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Tytuł:
Experimental Investigation of Interfacial Conditions between Fluid and Porous Layer Formed by Periodic Arrays of Circular and Non-Circular Cylinders
Autorzy:
Cihat Baytaş, A.
Erdem, D.
Acar, H.
Cetiner, O.
Başcı, H.
Powiązania:
https://bibliotekanauki.pl/articles/1030800.pdf
Data publikacji:
2018-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
flows through porous media
interfacial flows
interface slip coefficient
interface geometry
composite channel
PIV
boundary condition
Opis:
In this experimental study, a flow through a two-dimensional channel partially containing porous media is investigated. A two-layer structure comprising of a saturated porous layer with an overlaying fluid flow layer in a rectangular horizontal channel is designed for the experiments. Flow characteristics at the interface between clear fluid and porous layer are investigated. The porous layer consists of cylindrical rod bundle placed horizontally on the side walls of the channel in arranged square arrays. In the experiments, water white oil is used as the working fluid to match the refractive index of the cylindrical rods made of Plexiglas. Visualizations and measurements have been acquired by digital particle image velocimetry system for the velocity profiles which help us to evaluate the interface velocity and slip coefficient at the interface region. The measurement of interface velocity profile is repeated for circular, square, and 45^{°} rotated square cylindrical rods to understand the effects of the structure of the interface region. It has been observed that dimensionless slip or interface velocity depends significantly on the surface structure at the interface region when cylindrical rods each with circular, square, and 45^{°} rotated square cross-sections are used as porous medium. The volumetric flow rate can be changed according to the cross-sections of cylindrical rods. The permeability for the different arrangements of cylindrical rods is computed by an analytical study. The dimensionless slip velocity, slip coefficient, particle image velocimetry images, experimental and numerical velocity vector maps, and velocity profiles at the interface are presented.
Źródło:
Acta Physica Polonica A; 2018, 133, 5; 1314-1323
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania wpływu naprężeń normalnych na zachowanie połączenia międzywarstwowego przy ścinaniu próbek asfaltowych zbrojonych siatkami
Influence of normal strains on pavement inter-layer behavior during shear tests of asphalt specimens reinforced with road grid
Autorzy:
Gajewski, M.
Mirski, K.
Bańkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/144850.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
nawierzchnia drogowa
ścinanie międzywarstwowe
interfejs
zbrojenie siatką
road pavement
interlayer shear
interface
reinforcing grids
Opis:
Artykuł przedstawia wyniki badania ścinania próbek warstwowych zbrojonych siatkami w prototypowym aparacie, pozwalającym na realizację dodatkowego obciążenia prostopadłego do płaszczyzny połączenia warstw. Zaprezentowane wyniki mogą stanowić przesłanki do oceny wpływu zbrojenia nawierzchni siatkami na pracę interfejsu międzywarstwowego.
This paper presents the results of shear tests of layered specimens reinforced with road grids in the prototype device, which allows for the application of additional normal loads perpendicular to the plane of connecting layers. The presented results may be used to assess the influence of reinforcing grids on pavement inter-layer interface behavior.
Źródło:
Drogownictwo; 2012, 7-8; 253-259
0012-6357
Pojawia się w:
Drogownictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charge-pumping characterization of SOI devices fabricated by means of wafer bonding over pre-patterned cavities
Autorzy:
Głuszko, G.
Łukasiak, L.
Kilchytska, V.
Chung, T. M.
Olbrechts, B.
Flandrie, D.
Raskin, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/308669.pdf
Data publikacji:
2007
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
charge-pumping
electrical characterization
interface traps
SOI
water bonding
Si layer transfer
Opis:
The quality of the silicon-buried oxide bonded interface of SOI devices created by thin Si film transfer and bonding over pre-patterned cavities, aiming at fabrication of DG and SON MOSFETs, is studied by means of chargepumping (CP) measurements. It is demonstrated that thanks to the chemical activation step, the quality of the bonded interface is remarkably good. Good agreement between values of front-interface threshold voltage determined from CP and I-V measurements is obtained.
Źródło:
Journal of Telecommunications and Information Technology; 2007, 3; 61-66
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of the interface evolution during Si layer growth on a partially masked substrate
Autorzy:
Gulkowski, S.
Olchowik, J.
Cieślak, K.
Moskvin, P.
Powiązania:
https://bibliotekanauki.pl/articles/1934033.pdf
Data publikacji:
2011
Wydawca:
Politechnika Gdańska
Tematy:
epitaxial lateral overgrowth
liquid-phase epitaxial growth
computer simulations
Opis:
High-quality thin Si layers obtained from the solution by epitaxial lateral overgrowth (ELO) can play a crucial role in photovoltaic applications. The laterally overgrown parts of the layer are characterized by a lower dislocation density than that of the substrate. The height and width of the layer depend on several factors, such as the technological conditions of liquid phase expitaxy (LPE), growth temperature, cooling rate and the geometry of the system (mask filling factor). Therefore, it is crucial to find the optimal set of technological parameters in order to obtain very thin structures with a maximum width (high aspect ratio). This paper presents a computational study of Si epilayer growth on a line-pattern masked silicon substrate from Si-Sn rich solution. To solve this problem, a mixed Eulerian-Lagrangian approach was applied. The concentration profile was calculated by solving the two-dimensional diffusion equation with appropriate boundary conditions. The growth velocity was determined on the basis of gradients of concentration in the border of the interface. Si interface evolution from the opened window was demonstrated.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2011, 15, 1; 91-98
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wear resistance of piston sleeve made of layered material structure: MMC A356R, anti-abrasion layer and FGM interface
Autorzy:
Hernik, S.
Powiązania:
https://bibliotekanauki.pl/articles/387577.pdf
Data publikacji:
2016
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
piston sleeve
wear
thermo-elasticity
Archard's law
Metal Matrix Composite
MMC
Functionally Graded Material
FGM
odporność na zużycie
termosprężystość
prawo Archarda
tuleja tłoka
stal nierdzewna
Opis:
The aim of this paper is the numerical analysis of the one of main part of car engine – piston sleeve. The first example is for piston sleeve made of metal matrix composite (MMC) A356R. The second improved material structure is layered. Both of them are comparison to the classical structure of piston sleeve made of Cr-Ni stainless steel. The layered material structure contains the anti-abrasion layer at the inner surface of piston sleeve, where the contact and friction is highest, FGM (functionally graded material) interface and the layer of virgin material on the outer surface made of A356R. The complex thermo-elastic model with Archard's condition as a wear law is proposed. The piston sleeve is modelling as a thin walled cylindrical axisymmetric shell. The coupled between the formulation of thermoelasticity of cylindrical axisymmetric shell and the Archard’s law with functionally changes of local hardness is proposed.
Źródło:
Acta Mechanica et Automatica; 2016, 10, 3; 207-212
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elastostatic problem for an interface rigid inclusion in a periodic two-layer space
Autorzy:
Kaczyński, A.
Kozłowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/386500.pdf
Data publikacji:
2010
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
naprężenie
efektywne własności materiałowe
statyka
tension
elastostatic problem
elastostatics
Opis:
The article is devoted to the elastostatic three-dimensional problem of an interface sheet-like inclusion (anticrack) embedded into a periodic two-layered unbounded composite. An approximate analysis is carried out within the framework of the homogenized model with microlocal parameters. The formulation and the method of solving the general problem for an arbitrarily shaped inclusion is presented. As an example illustrating this method, the problem for a rigid circular inclu- sion under perpendicular tension is solved explicitly and discussed from the point of view of failure theory.
Źródło:
Acta Mechanica et Automatica; 2010, 4, 4; 42-50
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The 3D thermoelastic problem of uniform heat flow disturbed by an interface crack in a periodic two-layer composite
Trójwymiarowe zagadnienie stałego przepływu ciepła zakłóconego przez międzywarstwową szczelinę w periodycznym dwuwarstwowym kompozycie
Autorzy:
Kaczyński, A.
Matysiak, S. J.
Powiązania:
https://bibliotekanauki.pl/articles/280666.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
periodic two-layered space
homogenized model
interface crack
heat flow
thermal stresses
Opis:
This paper is concerned with the problem of an interface insulated plane crack obstructing a uniform heat flux in a two-layer microperiodic space. An approximate analysis is performed within the framework of linear stationary thermoelasticity with microlocal parameters. A general method of solving the resulting boundary-value problem is presented. It is based on the use of potential functions and an analogy between the thermal crack problem and the skew-symmetric mechanical loading problem. The thermal stress singularities are discussed.
Problem stałego przepływu ciepła zakłóconego istnieniem izolowanej termicznie szczeliny międzywarstwowej w periodycznie dwuwarstwowej przestrzeni jest przedmiotem pracy. Przybliżoną analizę przeprowadzono w ramach liniowej stacjonarnej termosprężystości z parametrami mikrolokalnymi. Podano i zilustrowano metodę rozwiązania wynikającego zagadnienia brzegowego, polegającą na zastosowaniu potencjałów harmonicznych i ustaleniu analogii z odpowiadającym mechanicznym, niesymetrycznym problemem szczeliny. Zbadano osobliwości naprężeń cieplnych wokół szczeliny.
Źródło:
Journal of Theoretical and Applied Mechanics; 2004, 42, 1; 59-68
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of azathioprine on the parameters of double Hg/chlorate(VII) interface layer in the presence of nonionic surfactants
Autorzy:
Kaliszczak, Waldemar
Grochowski, Mariusz
Nosal-Wiercińska, Agnieszka
Brycht, Mariola
Checinska-Majak, Dorota
Gołębiowska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/109820.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
azathioprine
mixed adsorption layers
Triton X-100
Tween 80
adsorption parameters
water activity
Opis:
The mixed adsorption of azathioprine and Triton X-100 or Tween 80 at the mercury/ chlorates (VII) interface wasdescribed. The differential capacitance of the double layer Cd at the Hg/ basic electrolyte interface was measured using the electrochemical impedance spectroscopy. The potential of zero charge Ez wasdetermined applying streaming mercury electrode and the surface tension at the potential of zero charge γz was measured by the method of the highest pressure inside the mercury drop. The changes of determined parameters in the function of the supporting electrolyte concentration point with the participation of ClO4-ions in the adsorption process, as well as the electrostatic interactions between the dipoles of H2O and azathioprine–Triton X-100 or azathioprine–Tween 80 in the double layer are shown.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 6; 1350-1356
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and Characterization of GaN/Polymer Composite p-n Junction with PEDOT Nanoparticle Interface Layer
Autorzy:
Kim, M.
Jin, S.
Choi, H.
Kim, G.
Yim, K.
Kim, S.
Nam, G.
Yoon, H.
Kim, Y.
Lee, D.
Kim, Jin
Kim, Jong
Leem, J.
Powiązania:
https://bibliotekanauki.pl/articles/1505152.pdf
Data publikacji:
2011-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.61.Ey
81.15.Gh
Opis:
A heavily Si-doped GaN/polymer hybrid structure with p-type poly(3,4-ethylene-dioxythiophene):beta-1,3-glucan (PEDOT nanoparticle) interface layer has been fabricated. The Si-doped GaN thin film with carrier concentration of 1 × $10^{19} cm^{-3}$ was grown by metal-organic chemical vapor deposition. The PEDOT nanoparticle with various sizes ranging from 60 to 120 nm was synthesized via a miniemulsion polymerization process. The electrical conductivity of the PEDOT nanoparticle is less than 1.2 S/cm. The current-voltage (I-V) characteristic of the hybrid structure shows diode-like behavior. The I-V characteristic was examined in the framework of the thermionic emission model. The ideality factor of the structure without PEDOT nanoparticle interface layer is 12.9. However, the ideality factor of the hybrid structure with PEDOT nanoparticle interface layer is obtained as 1.9. The value of ideality factor is dramatically decreased by inserting the PEDOT nanoparticle interface layer.
Źródło:
Acta Physica Polonica A; 2011, 119, 6; 875-879
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interface Properties of Single and Bi-Layer $Fe_3O_4$ Films Grown on MgO(001) Studied by RBS and Channeling Experiments
Autorzy:
Kim-Ngan, N.
Balogh, A.
Brötz, J.
Zając, M.
Korecki, J.
Powiązania:
https://bibliotekanauki.pl/articles/1535628.pdf
Data publikacji:
2010-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
34.35.+a
68.35.Ct
68.35.Fx
68.47.Gh
Opis:
Series of $Fe_3O_4$/MgO(001) and $Fe_3O_4$/Fe/MgO(001) films (single- and bi-layer films, respectively) with a total layer thickness in the range of 20 ÷ 150 nm were investigated by the Rutherford backscattering spectrometry (2 MeV $He^{+}$ ion beam), by the Rutherford backscattering spectrometry channeling experiments (1.5 MeV $He^{+}$ ion beam). Depending on the layer thickness of each layer and the film geometry, a single Fe peak and/or a double-anomaly feature was revealed in the Rutherford backscattering spectra. For all films no magnesium presence in the surface layer was observed. For both single- and bi-layer films with a total layer thickness less than 60 nm only one minimum was observed in the channeling curves, while a double minimum was revealed for the bi-layer films with a larger thickness. X-ray reflectometry measurements have revealed that the film density is the same as that of the bulk one.
Źródło:
Acta Physica Polonica A; 2010, 118, 4; 570-575
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
2D-Raman correlation spectroscopy as a method to recognize of the interaction at the interface of carbon layer and albumin
Autorzy:
Kołodziej, A.
Wesełucha-Birczyńska, Aleksandra
Moskal, Paulina
Stodolak-Zych, Ewa
Dużyja, Maria
Długoń, Elżbieta
Sacharz, Julia
Błażewicz, Marta
Powiązania:
https://bibliotekanauki.pl/articles/950923.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
multi-walled carbon nanotubes
pyrolytic carbon
carbon layers
raman microspectroscopy
plasma blood proteins
2D correlation
Opis:
In modern nanomaterial production, including those for medical purposes, carbon based materials are important, due to their inert nature and interesting properties. The essential attribute for biomaterials is their biocompatibility, which indicates way of interactions with host cells and body fluids. The aim of our work was to analyze two types of model carbon layers differing primarily in topography, and developing their interactions with blood plasma proteins. The first layer was formed of pyrolytic carbon C (CVD) and the second was constructed of multi-walled carbon nanotubes obtained by electrophoretic deposition (EPD), both set on a Ti support. The performed complex studies of carbon layers demonstrate significant dissimilarities regarding their interaction with chosen blood proteins, and points to the differences related to the origin of a protein: whether it is animal or human. However the basic examinations, such as: wettability test and nano sctatch tests were not sufficient to explain the material properties. In contrast, Raman microspectroscopy thoroughly decodes the phenomena occurring at the carbon structures in contact with the selected blood proteins. The 2D correlation method selects the most intense interaction and points out the different mechanism of interactions of proteins with the nanocarbon surfaces and differentiation due to the nature of the protein and its source: animal or human. The 2D correlation of the Raman spectra of the MWCNT layer+HSA interphase proves an increase in albumin β-conformation. The presented results explain the unique properties of the Clayers (CVD) in contact with human albumin.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2019, 13, 3; 74-83
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Epitaxial Layer Thickness on Built-in Electric Field in Region of AlGaAs/SI-GaAs Interface: A Photoreflectance Study
Autorzy:
Ochalski, T. J.
Żuk, J.
Vlasukova, L. A.
Powiązania:
https://bibliotekanauki.pl/articles/1968408.pdf
Data publikacji:
1997-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.66.Fd
78.20.-e
Opis:
We present a study of detailed line shapes of photoreflectance spectra for Al$\text{}_{0.3}$Ga$\text{}_{0.7}$ As/SI-GaAs epitaxial layers grown by MBE. All measurements were performed at 80 K under UHV conditions with a special care for the samples surface quality. A set of the photoreflectance spectra was collected for photon energies close to the GaAs and Al$\text{}_{0.3}$Ga$\text{}_{0.7}$As band gaps (E$\text{}_{0}$). The photoreflectance spectra originated in the vicinity of the Al$\text{}_{0.3}$Ga$\text{}_{0.7}$As/SI-GaAs interface were analyzed using the complex Airy function model of Franz-Keldysh oscillations. To examine the effect of the epitaxial layer thickness on parameters characterizing the interface, a step-by-step chemical etching was applied for stripping the top layers. The built-in electric field intensity, field inhomogeneity and phenomenological broadening parameter for interface regions were determined as a function of the epilayer thickness.
Źródło:
Acta Physica Polonica A; 1997, 92, 5; 935-939
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Approach to Rayleigh Wave Propagation in the Elastic Halfspace - Viscoelastic Layer Interface
Autorzy:
Pasternak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1811544.pdf
Data publikacji:
2008-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.35.Pt
68.35.Iv
43.20.Mv
46.35.+z
Opis:
The Rayleigh wave propagation problem in the elastic halfspace - viscoelastic layer interface was analysed in the paper. The problem was formulated in the Fourier-Laplace space using the Biot viscoelastic solid model. The characteristic equation has taken the Rayleigh equation form with correction term describing viscoelastic layer properties influence on the wave velocity. The approach presented here seems to be useful for surface acoustic waves gas sensors modelling because many chemisensitive coatings applied to the sensors exhibit viscoelastic properties.
Źródło:
Acta Physica Polonica A; 2008, 114, 6A; A-169-A-174
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method for determination of flow at the plane, horizontal interface separating streams of two different fluids
Autorzy:
Prosnak, W. J.
Cześnik, P. P.
Powiązania:
https://bibliotekanauki.pl/articles/241051.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
interface
almost parallel streams of two fluids
boundary layer
ordinary differential equations
matching conditions
Opis:
The paper deals with the theoretical investigation of the phenomenon, which consists in generation - by wind - of the movement of water, the bodies of air and of water being separated by a horizontal, plane interface, which is identical with the free surface of water. A set of assumptions defining a physical model of the phenomenon, borrowed from Lock (1951), is introduced, as well as the mathematical description of this model. It reduces to a composite ordinary differential problem, containing two non-linear equations of the third order, which have to satisfy some boundary conditions. A novel method of solution of the differential problem just mentioned is presented in the paper. In the method use is made of exact formulae for coefficients of series representing the solution. The method seems to be competitive with the one given in the paper by Lock (1951).
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2005, 52, 2; 89-110
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Layer and Interface Structure of CoFe/Ru Multilayers
Autorzy:
Pym, A.
Lamperti, A.
Cardoso, S.
Freitas, P.
Tanner, B.
Powiązania:
https://bibliotekanauki.pl/articles/1814028.pdf
Data publikacji:
2007-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.10.Kw
68.65.Ac
68.35.Ct
75.50.Kj
85.75.Dd
85.70.Ay
Opis:
Grazing incidence X-ray scattering measurements have been performed to probe the structure of CoFe/Ru layers and their interfaces. It was found that the interface width increased approximately linearly with the layer number from the substrate in a multilayer and that a substantial asymmetry existed between the width of CoFe/Ru and Ru/CoFe interfaces. By co-minimizing both the specular and diffuse scatter with that simulated from a model structure, the topological roughness amplitude was determined to be comparable to the intermixing interface width.
Źródło:
Acta Physica Polonica A; 2007, 112, 6; 1243-1248
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
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