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Wyszukujesz frazę "Multiphase Flow" wg kryterium: Temat


Tytuł:
Mathematical models of hydromechanics of multiphase flow with varying mass
Matematyczne modele hydromechaniki przepływu wielofazowego o zmiennej masie
Autorzy:
Mamedov, Gasim A.
Abbasov, Natiq M.
Powiązania:
https://bibliotekanauki.pl/articles/31348256.pdf
Data publikacji:
2023
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
multiphase flow
varying mass
continuum
phase transition
viscous fluid
tension
pressure
przepływ wielofazowy
zmienna masa
przejście fazowe
lepka ciecz
napięcie
ciśnienie
Opis:
The paper discusses the mathematical model of hydromechanics of multiphase flows with varying mass. A multiphase flow is considered a continuum consisting of a set of a large number of different groups of particles. The derivation of motion equations and similarity criteria are given taking into account both the externally attached (or detached) mass and phase transitions within the medium. The equations of mass, momentum and energy transfer for individual phases and the medium as a whole are derived based on fundamental conservation laws. It was demonstrated that in the absence of sources (or flow-offs) of mass, momentum and energy, the known equations of single- and multi-phase flow hydromechanics follow as a special case from the obtained systems of motion equations and similarity criteria. The obtained motion equations are valid for the description of an ingredient of mixture and the medium as a whole, regardless of their physical and mechanical properties. Thermodynamic and rheological state equations, as well as expressions for heat flow, interfacial mass forces phase transitions, and heat exchange between phases can be used to close them. The implemented models make it possible to simulate both the stationary distribution of parameters along the wellbore during production and non-stationary processes that occur, for example, when the pump shaft speed changes during oil production. The developed approaches were implemented in the DataFlow software tool for analysis of the hydrodynamics of multiphase hydrocarbon flows, taking into account heat exchange with the rocks surrounding the well, and phase transitions in the fluid. Using the software package, test calculations were carried out to demonstrate the performance of the proposed and implemented models.
W artykule omówiono model matematyczny hydromechaniki przepływów wielofazowych o zmiennej masie. Przepływ wielofazowy jest traktowany jako kontinuum składające się ze zbioru dużej liczby różnych grup cząstek. Wprowadzone równania ruchu i kryteria podobieństwa są podane z uwzględnieniem zarówno zewnętrznej dołączonej (lub odłączonej) masy, jak i przejść fazowych wewnątrz ośrodka. Równania transferu masy, pędu i energii dla poszczególnych faz i ośrodka jako całości otrzymano przy użyciu podstawowych praw zachowania. Wykazano, że w przypadku braku źródeł (lub wypływów) masy, pędu i energii, znane równania hydromechaniki przepływu jedno- i wielofazowego wynikają jako szczególny przypadek z otrzymanych układów równań ruchu i kryteriów podobieństwa. Uzyskane równania ruchu mają zastosowanie do opisu składnika mieszaniny i medium jako całości, niezależnie od ich właściwości fizycznych i mechanicznych. Do ich rozwiązania można wykorzystać termodynamiczne i reologiczne równania stanu, a także wyrażenia dotyczące przepływu ciepła, siły międzyfazowych masy, przejść fazowych i wymiany ciepła między fazami. Wdrożone modele umożliwiają symulację zarówno stacjonarnego rozkładu parametrów wzdłuż odwiertu podczas wydobycia, jak i procesów niestacjonarnych, które zachodzą na przykład podczas zmiany prędkości wału pompy w trakcie wydobycia ropy. Opracowane podejścia zostały zaimplementowane w oprogramowaniu DataFlow do analizy hydrodynamiki wielofazowych przepływów węglowodorów, z uwzględnieniem wymiany ciepła ze skałami otaczającymi odwiert oraz przejść fazowych w płynie. Za pomocą pakietu oprogramowania przeprowadzono obliczenia testowe w celu wykazania wydajności proponowanych i wdrożonych modeli.
Źródło:
Nafta-Gaz; 2023, 79, 11; 709-715
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of TiO2 NPs catalyst and packing material in removal of phenol from wastewater using an ozonized bubble column reactor
Autorzy:
Alattar, Saja A.
Sukkar, Khalid A.
Alsaffar, May A.
Powiązania:
https://bibliotekanauki.pl/articles/2201970.pdf
Data publikacji:
2023
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
petroleum refineries
phenol degradation
TiO2 NPs
multiphase flow reactor
catalytic ozonation reaction
rafinerie ropy naftowej
degradacja fenolu
TiO2
nanocząsteczki
reaktor przepływowy wielofazowy
katalityczna reakcja ozonowania
Opis:
Phenol is present as a highly toxic pollutant in wastewater, and it has a dangerous impact on the environment. In the present research, the phenol removal from wastewater has been achieved using four treatment methods in a bubble column reactor (treatment by ozone only, using packed bubble column reactor with ozone, utilizing ozone with TiO2 NPs catalyst in the reactor without packing, and employing ozone with TiO2 NPs in the presence of packing). The effects of phenol concentration, ozone dosage, TiO2 NPs additions, and contact time on the phenol removal efficiency were determined. It was found that at a contact time of 30 min, the phenol removal was 60.4, 74.9, 86.0, and 100% for the first, second, third, and fourth methods, respectively. The results indicated that the phenol degradation method using catalytic ozonation in a packed bubble column with TiO2 NPs is the best treatment method. This study demonstrated the advantages of using packing materials in a bubble column reactor to enhance the mass transfer process in an ozonation reaction and then increase the phenol removal efficiency. Also, the presence of TiO2 NPs as a catalyst improves the ozonation process via the production of hydroxyl routs. Additionally, the reaction kinetics of ozonation reaction manifested that the first order model is more applicable for the reaction. Eventually, the packed bubble column reactor in the presence of TiO2 NPs catalyst provided a highperformance removal of phenol with a high economic feasibility.
Źródło:
Acta Innovations; 2023, 46; 93--105
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of turbulence damping in the OpenFOAM multiphase flow solver interFoam
Autorzy:
Polansky, Jiri
Schmelter, Sonja
Powiązania:
https://bibliotekanauki.pl/articles/2091357.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multiphase flow
stratified flow
turbulence damping
computational fluid dynamics
OpenFOAM
Reynolds-averaged Navier–Stokes
Detached Eddy Simulation
Delayed Detached Eddy Simulation
Opis:
In the presented work Egorov’s approach (adding a source term to the ω-equation in the k-ω model, which mimics the damping of turbulence close to a solid wall) was implemented in on the subclass of shear stress transport models. Hence, turbulence damping is available for all shear stress transport type models, including hybrid models that are based on the ω-equation. It is shown that turbulence damping improves the prediction of the axial velocity profile not only for Reynolds-averaged Navier–Stokes simulation but also for detached eddy simulation and delayed detached eddy simulation models. Furthermore, it leads to a more realistic estimation of the pressure drop and, hence, to a more correct prediction of the liquid level. In this paper, simulation results for four different turbulence models are presented and validated by comparison with experimental data. Furthermore, the influence of the magnitude of the damping factor on the pressure drop in the channel is investigated for a variety of different gas-to-liquid flow rate ratios. These investigations show that higher gas-to-liquid flow rate ratios require higher damping factors to correctly predict the pressure drop. In the end, advice is formulated on how an appropriate damping factor can be determined for a specific test case.
Źródło:
Archives of Thermodynamics; 2022, 43, 1; 21--43
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational fluid dynamics modelling of short timebottle filling process
Autorzy:
Jałowiecka, Monika
Makowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/185137.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
air entrainment
bottle filling
Computational Fluid Dynamics
multiphase flow
Volume of Fluid method
napowietrzenie
napełnianie butelek
Obliczeniowa dynamika płynów
przepływ wielofazowy
Metoda objętości płynu
Opis:
Every change in the bottle geometry as well as every change of physical and rheological properties posesa risk of excessive gas entrainment during a filling process. To maintain satisfactory filling efficiencythere is a need to optimise this process with respect to all adverse phenomena which affect the fluidflow, such as spluttering on the bottom, air caverns formation and air entrainment with incoming liquid.This paper comprises numerical simulations of two filling methods. The first method involves dosingwith a pipe placed over the free liquid surface of a fully filled bottle. The second method covers fillingwith a pipe located near the bottom. Moreover, the influence of rheological properties and surfacetension values is considered. The comprehensive analysis of amount of entrained air represented byair volume fraction in dispensed liquid let the authors define the influence of filling speed on themechanism and amount of entrapped air.
Źródło:
Chemical and Process Engineering; 2020, 41, 2; 143--163
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational fluid dynamics simulation of gas–liquid multiphase flow in T-junction for CO2 separation
Autorzy:
Wrzesień, Sylwia
Madejski, Paweł
Ziółkowski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/37215646.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Computational Fluid Dynamics
CFD
Multiphase Flow
Numerical Simulations
T-junction
Opis:
The article presents the results of a computational fluid dynamics (CFD) analysis of gas-liquid multiphase flow. The simulation was conducted using CFD code and the Euler–Euler approach. The presented study relates to the non–reactive, steady-state, turbulent flow of water and carbon dioxide mixture in a 3D pipe. Separation phenomenon between phases is observed. The solution was obtained using a mixture model. Different values of carbon dioxide volume fraction were taken into account in the analysis of the results. The analysed cases were compared thanks to the obtained calculations results. The main purpose of the simulations was to show streamlines, velocity, pressure, and volume fraction distribution that could be useful in developing pipeline systems in many industrial applications, especially for CO2 separators.
Źródło:
Zeszyty Energetyczne; 2020, 7; 403-414
2658-0799
Pojawia się w:
Zeszyty Energetyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of bubble-particle interaction in different flotation processes and applications - a review of recent studies
Autorzy:
Patnaik, Nelesh
Menon, Aditya
Gupta, Tapesh
Joshi, Vijesh
Powiązania:
https://bibliotekanauki.pl/articles/1450499.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
bubble-particle interaction
bubble dynamics
multiphase flow
fluid interface
Opis:
Flotation process involves aggregation of the particles based on the material/compound type of random mixtures such as ores and seawater. It is primarily used in pretreatment of water desalination and other industrial applications. The process makes use of various fluid mechanics principles as multifluids are involved. The multi-fluids in most of the flotation processes are of different phases, such as air and water. Like any other process, the efficiency of flotation is important, and hence most of the studies have been dedicated to understanding how the various parameters are affecting the flotation process. Among various parameters, fluids properties and flow parameters chiefly affect the flotation process. In particular, the bubble-particle interaction of the flotation process has been of interest as it is one of the cost-effective ways to enhance flotation efficiency. In this review, the authors present the latest developments in such parametric studies. This paper could be of interest to research students, academic researchers, and practitioners who want to contribute to (or take from) flotation research.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 6; 206-224
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation of the stress state of an erosion-worn tee of the main gas pipeline
Autorzy:
Doroshenko, Ya.
Zapukhliak, V.
Grudz, Ya.
Poberezhny, L.
Hrytsanchuk, A.
Popovych, P.
Shevchuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/1818501.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
multiphase flow
gas-dynamic process
erosion wear
residual life
temperature difference
erosion defect
allowable wall thickness
przepływ wielofazowy
proces gazodynamiczny
zużycie erozyjne
trwałość resztkowa
różnica temperatur
wada erozji
Opis:
Purpose: To investigate the strength of tees with regard to their erosion wear, it is necessary to consider the complex three-dimensional geometric shape of the erosion worn inner surface of the tee. In addition, the study of the strength of the erosion worn tees of the main gas pipelines is complicated by the occurrence of additional stresses caused by changes in the direction of movement of the gas stream, resulting in an uneven pressure distribution in the inner cavity of the tee, and the temperature difference in its walls. Design/methodology/approach: Methodology for complex numerical three-dimensional simulation of the stressed state of tees of the main gas pipelines, taking into account the gas-dynamic processes that occur in the places of these defects, erosion wear of the tee wall, temperature difference in the tee walls. Findings: The acceptable parameters of erosion defects of tees of gas pipelines, and residual life of tees with erosion defects of the wall should be determined. Research limitations/implications: The developed model does not take into account internal corrosion and corrosion products as an additional erosion factor. Further studies plan to develop a model of corrosion-erosion wear of pipeline elements. Practical implications: The developed technique allows determining the location of erosion defects, estimating the strength and determining the residual life of tees with erosion wear of the wall in order to ensure their reliability, to rank such defects according to the degree of danger, to determine which of them are critical and need an immediate repair. Originality/value: Based on the gas-dynamic processes occurring in the internal cavity of the main gas pipelines’ tees, the complex three-dimensional geometric form of wall erosion defects, and temperature difference, the technique of three-dimensional simulation of stress state of the main gas pipelines’ tees is developed
Źródło:
Archives of Materials Science and Engineering; 2020, 101, 2; 63--78
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and simulation of a multienergy gamma ray absorptiometry system for multiphase flow metering with accurate void fraction and water-liquid ratio approximation
Autorzy:
Khayat, Omid
Afarideh, Hossein
Powiązania:
https://bibliotekanauki.pl/articles/147267.pdf
Data publikacji:
2019
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
multiphase flow measurement
void fraction
water-liquid ratio
flow regime
MCNP
artificial neural network
reżim przepływu
sztuczna sieć neuronowa
Opis:
Multiphase flow meters are used to measure the water-liquid ratio (WLR) and void fraction in a multiphase fluid stream pipeline. In the present study, a system of multiphase flow measurement has been designed by application of three thallium-doped sodium iodide scintillators and a radioactive source of 133Ba simulated by Monte Carlo N-particle (MCNP) transport code. In order to capture radiations passing across the pipe, two direct detectors have been installed on opposite sides of the radioactive source. Another detector has been placed perpendicular to the transmission beam emitted from the 133Ba source to receive radiations scattered from the fluid flow. Simulation was done by the MCNP code for different volumetric fractions of water, oil, and gas phases for two types of flow regimes, namely, homogeneous and annular; training and validation data have been provided for the artificial neural network (ANN) to develop a computation model for pattern recognition. Depending on applications of the neural system, several structures of ANNs are used in the current paper to model the flow measurement relations, while the detector outputs are considered as the input parameters of the neural networks. The first, second, and third structures benefit from two, three, and five multilayer perceptron neural networks, respectively. Increasing the number of ANNs makes the system more complicated and decreases the available data; however, it increases the accuracy of estimation of WLR and gas void fraction. According to the results, the maximum relative difference was observed in the scattering detector. It was clear that transmission detectors would demonstrate the difference between the flow regimes as well. It is necessary to note that the error calculated by the MCNP simulator is <0.5% for the direct detectors (TR1 and TR2). Due to the difference between the data of the two flow regimes and the errors of data in the simulation codes of the MCNP, it was possible to separate these flow regimes. The effect of changing WLR on the efficiency for a constant void fraction confi rms a considerable variance in the results of annular and homogeneous flow s occurring in the scattering detector. There is a similar trend for the void fraction; hence, one can easily distinguish changes in efficiency due to the WLR. Analysis of the simulation results revealed that in the proposed structure of the multiphase flow meter and the computation model used for simulation, the two flow regimes are simply distinguishable.
Źródło:
Nukleonika; 2019, 64, 1; 19-29
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza sposobów modelowania reaktora trójfazowego ze stałym złożem (TBR) z użyciem metod CFD
Analysis of modelling of a three-phase fixed bed reactor using CFD procedures
Autorzy:
Janecki, D.
Bartelmus, G.
Powiązania:
https://bibliotekanauki.pl/articles/2073295.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
reaktor strużkowy
model CFD
hydrodynamika
przepływy wielofazowe
trickle-bed reactor
CFD model
hydrodynamics
multiphase flow
Opis:
Przedstawiono zagadnienia związane z zastosowaniem modelu wielofazowego Eulera do modelowania reaktora trójfazowego ze złożem stacjonarnym (TBR). Analizując równania modelu wyselekcjonowano parametry, które obliczane są w oparciu o dane dostępne w literaturze, a następnie przeprowadzono analizę czułości modelu na zmianę wartości wyselekcjonowanych parametrów. Przeanalizowano wpływ zmian zależności opisujących siły wzajemnych oddziaływań pomiędzy fazami oraz promieniowej zmiany porowatości wypełnienia na wyniki obliczeń numerycznych.
The paper presents issues connected with the use of Eulerian multiphase model for modelling a three-phase fixed-bed reactor (TBR). Param eters calculated on the basis of available in literature data were selected, and next the analysis of model sensitivity to the change of selected parameters was carried out. The influence of changes of relationships describing the interaction forces between phases and the change of radial porosity of packing on the results of numerical calculations was analyzed.
Źródło:
Inżynieria i Aparatura Chemiczna; 2018, 4; 95--96
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelowanie procesu napełniania przy użyciu obliczeniowej mechaniki płynów
Modelling of the filling process using computational fluid mechanics
Autorzy:
Makowski, Ł.
Wyszomierska, E.
Grochowiecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/2073290.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
obliczeniowa mechanika płynów
przepływ wielofazowy
dozowanie płynów
piana ciekła
computational fluid dynamics
multiphase flow
fluid dosing
foam
Opis:
Celem pracy było przeprowadzenie symulacji procesu napełniania pojemników cieczami pieniącymi się o różnych właściwościach reologicznych oraz określenie wpływu tych właściwości na ułamek objętościowy powietrza w cieczy. Wykazano, że zgodnie z przewidywaniami największy wpływ ma lepkość oraz napięcie powierzchniowe płynu. Im niższa wartość napięcia powierzchniowego tym powstawała większa liczba pęcherzyków powietrza podczas procesu napełniania. Dla cieczy o dużej lepkości proces przebiegał odmiennie - zatrzymane powietrze w cieczy w trakcie procesu dużo wolniej zanika niż przy nalewaniu cieczy o małej lepkości.
The aim of this work is to simulate the process of filling containers with foaming liquids with different rheological properties and to determ ine the effect of these properties on the volume fraction of air in the liquid. It has been shown that, as predicted, viscosity and surface tension of the fluid have the greatest influence. The lower the surface tension, the greater the number of air bubbles during the filling process. For viscous liquids the process is different - the air retained in the liquid during the process disappears much slower than when pouring Iow viscosity liquids.
Źródło:
Inżynieria i Aparatura Chemiczna; 2018, 4; 102--103
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Capillary Pumped Loop as a tool for collecting large heat fluxes from electronic devices on warships
Autorzy:
Mikielewicz, D.
Szymański, P.
Powiązania:
https://bibliotekanauki.pl/articles/260217.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Loop Heat Pipe
Capillary Pumped Loop
Porous Media
Multiphase Flow
Heat Transfer
Opis:
The combat potential of future warships will be directly related to the use of modern electronic devices being parts of advanced systems, such as, for instance, radar systems, fire aiming systems, fire detection systems, electric drive systems, and even electronic and radio-electronic weaponry, railguns and lasers, installed on these warships. The capacity and functionality of these devices is continually increasing, at decreasing mass and dimensions, which results in higher power consumption. Heat collection becomes a growing problem in operation of these devices. The paper presents a concept of the use of the CPL (Capillary Pumped Loop) cycle for passive heat collection from precise electronic devices used on warships. It also includes the description of the experimental rig and discussion of the results of laboratory tests performed on this rig and confirmed using the mathematical model developed by the authors.
Źródło:
Polish Maritime Research; 2017, 1; 72-80
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cavitation phenomenon research for different flow conditions
Autorzy:
Homa, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/1178400.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
cavitation
experimental fluid mechanics
flow over a foil
multiphase flow
Opis:
Cavitation is a multiphase phenomenon including vapor bubbles creation and collapse occurring alternately at high frequency in liquid stream. Creation of bubbles is possible under low pressure conditions, which occur for example during acceleration of the liquid. The collapses of bubbles generate pressure waves which spread through the flow. Working under cavitation condition is especially dangerous for power machines such as pumps and turbines, because it can lead to serious damage of blades. To investigate cavitating flow over a foil a test rig was built. The test rig included chamber with the blade fixed to the disc that enabled to set different angles of attack. The flow rate of water was changed by means of pump’s motor variable frequency drive. As the flow rate was increased, the velocity in chamber rose and pressure dropped. This led to cavitation structures appearance and development on the suction side of the blade. For different flow conditions the pictures of cavitating flow were taken and examined. Moreover, the pressure and the inlet and outlet of the chamber were recorded, as well as the value of volumetric flow rate. That enabled to determine the cavitation number, a parameter that describes intensity of cavitation in the flow, for each case.
Źródło:
World Scientific News; 2017, 73; 1-11
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental investigation into influence of oil-in-water emulsions flow on permeability of porous bed
Autorzy:
Błaszczyk, Mariola
Sęk, Jerzy
Przybysz, Łukasz
Pacholski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1178549.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
emulsions
multiphase flow
oil-in-water
porous bed permeability
Opis:
Emulsions are interesting dispersed systems that are necessary for a number of technological processes. Their flow through porous structures have many applications in the field of chemical engineering. Enhanced Oil Recovery (EOR) techniques, soil remediation and various treatment methods of oily wastewater are good examples of emulsion flow in porous structure. The phenomenon of dispersed system flow through porous media is not easy to describe, mainly because of rheological behavior of emulsions and porous structure properties. During two phase flow of oil and water through porous bed it is possible to observe the interception of oil to porous structure, as well as filtration of oil in pores. In this study, we tried to examine the influence of the fraction size as well as migration process history on permeability of porous bed.
Źródło:
World Scientific News; 2017, 70, 2; 241-251
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of emulsion inner phase concentration on permeability of deposit during flow through porous media
Autorzy:
Przybysz, Ł.
Błaszczyk, M.
Sęk, J.
Powiązania:
https://bibliotekanauki.pl/articles/105662.pdf
Data publikacji:
2017
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
emulsion
porous media
multiphase flow
emulsja
media porowate
przepływy wielofazowe
Opis:
The issue of emulsion flow through porous media plays an important role in the development of land purification methods from various oily substances, as well as during the oil extraction process. The concentration of the emulsion dispersed phase exerts a strong influence on the rheological properties. The oil in water emulsions (O/W), that have a concentration of less than 0.5 (or 50%), show Newtonian behavior, and those with higher concentrations non-Newtonian. The flow of such systems through the structure of the porous medium is, therefore, also dependent on the variable rheological properties of the liquid. When the emulsion flows through the porous medium, a reduction of the relative permeability occurs. Due to that the transport may be very effectively limited, as the pores of deposit are being blocked by oil droplets. The paper presents studies on emulsion flow, with various concentrations, through a granular bed. It allowed to track changes in the permeability of the deposit over time. The results of experimental studies of transport and elution of highly concentrated emulsions from granular structures are also presented. This enabled tracking of changes in flow resistance of the emulsion through the porous bed in time. Moreover, the development of the mathematical model, which allows us to define the relationship between the bed blockage degree and the concentration of the emulsion internal phase could be the result of the experimental works. The results of such studies are very widely used in practice, among other things, in the issues of migration of pollutants, such as petroleum substances, in the soil layers. The development of knowledge in this field may contribute to the optimization of existing oil recovery techniques and methods of remediation of soil from organic substances.
Źródło:
Acta Innovations; 2017, 23; 25-34
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predicting relative permeability from experimental capillary pressure porous plate test for two phase flow
Autorzy:
Czarnota, R.
Janiga, D.
Stopa, J.
Wojnarowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/298727.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
capillary pressure
relative permeability
crude oil
multiphase flow
Opis:
Relative permeabilities relationships as a function of fluids saturation are one of the most important parameters for describing multiphase flow processes in reservoir rocks. When direct laboratory tests are not available for investigating oil-water multi-phase flow in rocks, then indirect prediction techniques using relative permeability functions are widely used, e.g. from capillary pressure test. In this study the measurement of capillary pressure was performed on rocks plugs with different characteristics at reservoir conditions using porous plate method. During measurement semi-permeable membrane was used with 15 bar threshold pressure, what allowed to register formation water saturation, at changing differential pressures steps. Desaturation at each pressure stage was continued until no more produced liquid was observed. Water saturation point at maximum capillary pressure applied is assumed to be final irreducible water saturation. Application of porous plate method provides sufficient stabilization time, allowing to achieve uniform saturation distribution. In this research, Brook-Corey model was used to predict relative permeability from experimental measured capillary pressure data for oil-water phase flow in porous media. As a result, it is possible to obtain more accurate capillary pressure outcomes, and relative permeability curves for the two-phase system, than other methods used in practice. Performing capillary pressure measurements at reservoir conditions, allows to restore the processes occurring in the reservoir.
Źródło:
AGH Drilling, Oil, Gas; 2017, 34, 2; 323-334
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł

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