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Wyszukujesz frazę "chemical reaction parameter" wg kryterium: Wszystkie pola


Wyświetlanie 1-6 z 6
Tytuł:
Hall effects on isothermal vertical plate with uniform mass diffusion in the presence of rotating fluid and chemical reaction of first order
Autorzy:
Dhananjeya Kumaar, V. S. A.
Muthucumaraswamy, R.
Powiązania:
https://bibliotekanauki.pl/articles/265031.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
Hall effect
chemical reaction parameter
rotating fluid
angular velocity
efekt Halla
reakcja chemiczna
prędkość kątowa
Opis:
An exact solution of the combined study of Hall effects on a vertical plate with a rotating fluid in the presence of a homogeneous chemical reaction of first order has been analysed. The dimensionless governing coupled partial differential equations are tackled using the usual Laplace transform technique. The sway of the Hall parameter, Hartmann number, Grashof number, Prandtl number, Schmidt number, chemical reaction parameter on the axial velocity and concentration of the fluid has been depicted graphically. When the non-dimensional angular velocity, Ω=2M21+m.2, the transverse velocity component vanishes, thereby the axial velocity of the fluid attains the maximum value. It is noted that with increase in the Hall parameter, thermal Grashof number and mass Grashof number, the axial velocity of the fluid increases significantly.
Źródło:
International Journal of Applied Mechanics and Engineering; 2017, 22, 1; 111-121
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of chemical reaction on transient MHD flow with mass transfer past an impulsively fixed infinite vertical plate in the presence of thermal radiation
Autorzy:
Reddy, B. Prabhakar
Powiązania:
https://bibliotekanauki.pl/articles/264441.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
magnetohydrodynamika
pole magnetyczne
reakcja chemiczna
MHD
magnetic field
fixed vertical plate
chemical reaction parameter
radiation parameter
Opis:
The effects of chemical reaction on a transient MHD mixed convection flow with mass transfer past an impulsively fixed infinite vertical plate under the influence of a transverse magnetic field have been presented. The medium is considered to be non-scattering and the fluid to be non-gray having emitting-absorbing and optically thick radiation limit properties. The dimensionless governing equations of the flow and mass transfer with boundary conditions are solved numerically by using the Ritz finite element method. The numerical results for the velocity, temperature and the concentration profiles as well as the skin-friction coefficient for different values of physical parameters such as the radiation parameter, magnetic parameter, Schmidt number and chemical reaction parameter have been obtained and presented through graphs and tables. It has been found that there is a fall in the temperature and velocity for both air and water as the radiation parameter is increased. An increase in the Schmidt number and chemical reaction parameter results a decrease in the concentration and velocity profiles for both air and water. Furthermore, an increase in the radiation parameter, magnetic parameter, Schmidt number and chemical reaction parameter decreases the skin-friction.
Źródło:
International Journal of Applied Mechanics and Engineering; 2019, 24, 4; 169-182
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation and chemical reaction effects on unsteady MHD free convection parabolic flow past an infinite isothermal vertical plate with viscous dissipation
Autorzy:
Reddy, B. Prabhakar
Powiązania:
https://bibliotekanauki.pl/articles/265160.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
promieniowanie
reakcja chemiczna
magnetohydrodynamika
swobodna konwekcja
płyta pionowa
radiation parameter
chemical reaction parameter
porous medium
MHD
free convection
isothermal vertical plate
Opis:
The numerical investigation of the effects of radiation and chemical reaction on an unsteady MHD free convection flow with a parabolic starting motion of an infinite isothermal vertical porous plate taking into account the viscous dissipation effect has been carried out. The fluid is considered a gray, absorbing emitting radiation but a non-scattering medium. The dimensionless governing equations for this investigation are solved numerically by applying the Ritz finite element method. Numerical results for the velocity profiles, temperature profiles and concentration profiles as well as the skin-friction are presented through graphs and tables for different values of the physical parameters involved. Results obtained show a decrease in the temperature and velocity in the boundary layer as the radiation parameter increased. The velocity increases with an increase in the thermal and mass Grashof numbers and decreases with an increase in the magnetic parameter. Further, the concentration and velocity decreases with increasing the Schmidt number and chemical reaction parameter. These findings are in very good agreement with the studies reported earlier.
Źródło:
International Journal of Applied Mechanics and Engineering; 2019, 24, 2; 343-358
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Newtonian heating effect on heat absorbing unsteady MHD radiating and chemically reacting free convection flow past an oscillating vertical porous plate
Autorzy:
Prabhakar Reddy, B.
Makinde, O. D.
Powiązania:
https://bibliotekanauki.pl/articles/2174166.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
magnetohydrodynamika
promieniowanie
reakcja chemiczna
Newtonian heating
radiation parameter
chemical reaction rate
oscillating plate
heat absorption parameter
Opis:
In this article, we have discussed in detail the effect of Newtonian heating on MHD unsteady free convection boundary layer flow past an oscillating vertical porous plate embedded in a porous medium with thermal radiation, chemical reaction and heat absorption. The governing PDEs of the model together with related initial and boundary conditions have been solved numerically by the finite element method. The dimensionless velocity, temperature and concentration profiles are analyzed graphically due to the effects of key parameters in the concerned model problem. Computed results for the skin friction coefficient, Nusselt number and Sherwood number are put in tabular form. It is observed that the thermal and mass buoyancy effects support the velocity whilst a reverse effect is noticed when the strength of the magnetic field is increased. The velocity and temperature enhances with an increase in the Newtonian heating and thermal radiation whilst a reverse effect is observed with an increase in the Prandtl number and heat absorption parameter. Increasing Schmidt number and chemical reaction parameter tends to depreciate both velocity and concentration. The Newtonian heating, thermal radiation and magnetic field tends to decrease in the skin friction. The Nusselt number increases with increasing Newtonian heating and heat absorption parameters. An increase in the Schmidt number and chemical reaction rate tends to improve the Sherwood number.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 168--187
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetohydrodynamic flow around an elongated cylinder in non-Darcian porous regime with higher order chemical reaction and Soret/Dufour effects
Autorzy:
Das, Utpal Jyoti
Begum, Jubi
Powiązania:
https://bibliotekanauki.pl/articles/27312395.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
parametr bezwładności
magnetohydrodynamika
zjawisko Dufoura
efekt Soreta
ośrodek porowaty
inertia parameter
magnetohydrodynamic
Soret number
Dufour number
porous medium
elongating cylinder
bvp4c
Opis:
Here, we consider magnetohydrodynamic flow of an incompressible, time independent fluid past an elongated cylinder surrounded in a non-Darcian porous regime with magnetic flux supplied at an acute angle. The Soret/Dufour effects and the higher order chemical reactions are also included in the present study. The subsequent governing equations are resolved using the MATLAB-bvp4c method. The flow velocity appears to decrease with the growth of the Reynolds number, inertia parameter, magnetic field and angle of inclination of the magnetic flux, but improves with the Darcy number. The inertia parameter enhances the fluid temperature and skin friction. Further order of chemical reaction, Soret/ Dufour number plays a significant role in the system.
Źródło:
International Journal of Applied Mechanics and Engineering; 2023, 28, 1; 11--22
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and assessment of technological processes of the Miedwie Lake surface water treatment plant for the city of Szczecin
Analiza i ocena procesów technologicznych stacji uzdatniania wody powierzchniowej z jeziora Miedwie dla miasta Szczecina
Autorzy:
Wira, J.
Wira, D.
Powiązania:
https://bibliotekanauki.pl/articles/84845.pdf
Data publikacji:
2005
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
technological process
Lake Miedwie
surface water
water treatment plant
Szczecin city
protection zone
lake water
tributary
raw water
clean water
water parameter
water analysis
water temperature
chloride
chemical oxygen demand
oxidizability
pH reaction
alkalinity
carbon dioxide
Opis:
Miedwie Lake is the biggest post-glacial lake of the West-Pomeranian Voievodship. At the same time it is the fifth of the largest lakes in Poland. As regards the geographical situation, Miedwie Lake is situated centrally between three big agglomerations i.e. Szczecin, Stargard Szczecinski and Pyrzyce (Fig. 1). The lake lies on the territory of three municipalities: Pyrzyce and Warnice in the District of Pyrzyce as well as Stargard Szczecinski in the District of Stargard (Rozmiarek 1983, Szyper 1990). At the moment, the reservoir is characterised with the regular, prolonged shape resembling an ellipse. Banks are shallow, regular and sometime very wet. The lake has the belt of the nearshore reaching locally tens metres far from the lake bank, what is the reason, together with the fact that the wind blows always here, that it is convenient for practising the various kinds of water sports. The lake area amounts to 3 527 ha; maximal depth – 43.8 m; average depth – 19.3 m; water capacity – 681.7 mln m3; shore-line length – 38.8 km; water level datum 14.1 m above sea level; maximal width 3.16 km; maximal length 16.2 km. The lake’s bottom is the lowest situated area on the territory of Poland.
Ujecie wody „Miedwie” powstało w roku 1976. Do tego czasu wody jeziora odpowiadały pierwszej klasie czystości. Jednakże jakość wody zaczęła się pogarszać już po rozpoczęciu eksploatacji ujęcia, dochodząc aż do poziomu trzeciej klasy czystości. Przyczyną był brak oczyszczalni oraz PGR-y. Zanieczyszczenie zbiornika powodowało masowe śniecią ryb (siei miedwiańskiej), przy dnie pojawił się siarkowodór, masowo zakwitały glony. Dalsze pogarszanie się stanu jeziora groziło zamknięciem ujęcia wody oraz wyniszczeniem życia biologicznego w zbiorniku, jak również wokół niego. Spadek jakości wód jeziora spowodowany był kilkoma czynnikami: rolnictwo, baza rosyjska w Kluczewie, turystyka, dopływy jeziora, biomanipulacja wodami Miedwia.
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2005, 09
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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