Wszystkie pola: Drag - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Drag force of a porous particle moving axisymmetrically in a closed cavity of micropolar fluid
Autorzy:: Madasu, Krishna Prasad
Powiązania:: https://bibliotekanauki.pl/articles/122694.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: micropolar fluid
Stokes flow
sphere
concentric
drag force
płyn mikropolarny
prawo Stokesa
siła tarcia
siła hydrodynamiczna
przepływ pełzający
Opis:: The present paper deals with the problem of an incompressible axisymmetric creeping flow caused by a porous spherical particle in a spherical cavity filled with micropolar fluid. Depending on the kind of cell model, appropriate boundary conditions are used on the surface of sphere and spherical cavity. Drag force on the porous particle in the presence of a cavity is calculated to determine the correction factor to the Stokes law. A general expression for the hydrodynamic force acting on the porous sphere and, hence, for the wall correction factor of the sphere are obtained. The special cases of the porous sphere in viscous fluid, zero permeability solid sphere in micropolar fluid and viscous fluid are obtained in open and closed cavity respectively.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 4; 41-51
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Drag on a permeable sphere placed in a micropolar fluid with non-zero boundary condition for microrotations
Autorzy:: Mishra, V.
Gupta, B. R.
Powiązania:: https://bibliotekanauki.pl/articles/122361.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: drag force
modified Bessel’s function
micropolar fluid
permeable sphere
stream function
siła tarcia
funkcja Bessela
Opis:: This paper concerns an analytical study of an infinite expanse of uniform flow of steady axisymmetric creeping flow of an incompressible micropolar fluid around the permeable sphere assuming a nonhomogeneous boundary condition for microrotation vector. It is assumed that microrotation vector is proportional to the rotation rate of velocity vector. The stream function solutions for the flow fields are obtained in the terms of modified Bessel’s functions and Gegenbauer functions. Continuity of normal velocity, no-slip condition, non-zero microrotation vector on the sphere, uniform velocity at infinity are the different boundary conditions used to determine the flow fields explicitly. The microrotation component, pressure field, bounds of permeability parameter and drag force experienced by the permeable sphere are calculated. Dependence of the drag force on different fluid parameters is presented graphically and discussed. It is found that drag force decreases with increasing spin parameter. Several cases of interest are deduced from the present analysis.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2016, 15, 3; 97-109
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Slip flow of a sphere in non-concentric spherical hypothetical cell
Autorzy:: Krishna-Prasad, Madasu
Powiązania:: https://bibliotekanauki.pl/articles/1839769.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: Stokes flow
rigid sphere
non-concentric
drag force
slip condition
przepływ Stokesa
siła tarcia
współczynnik poślizgu
współczynnik korekcji
Opis:: Slow axisymmetric flow of an incompressible viscous fluid caused by a slip sphere within a non-concentric spherical cell surface is investigated. The uniform velocity (Cunningham’s model) and tangential velocity reaches minimum along a radial direction are imposed conditions at the cell surface (Kvashnin’s model). The general solution of the problem is combined using superposition of the fundamental solution in the two spherical coordinate systems based on the centers of the slip sphere and spherical cell surface. Numerical results for the correction factor on the inner sphere are obtained with good convergence for various values of the relative distance between the centers of the sphere and spherical cell, the slip coefficient, and the volume fraction. The obtained results are in good agreement with the published results. The effect of concentration is more in the Cunningham’s model compared to the Kvashnin’s model. The wall correction factor on the no-slip sphere is more compared to that of a slip sphere. The correction factor on the slip sphere is more than that of a spherical gas bubble.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 3; 59-70
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The influence of computational domain discretization on CFD results concerning aerodynamics of a vehicle
Autorzy:: Sosnowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/122297.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: computational domain discretization
fluid dynamics
aerodynamics
AHMED body
drag coefficient
dyskretyzacja domeny obliczeniowej
dynamika płynów
aerodynamika
współczynnik oporu
Opis:: The paper presents research concerning the influence of computational domain discretization on the results of CFD analysis. Tetrahedral and polyhedral numerical mesh types are analyzed and the mesh convergence index is calculated. The obtained results are compared to the experimental measurements concerning the estimation of drag coefficient of the vehicle model. The research carried out indicates the great influence of pre-processing on the reliability of the obtained results. Moreover, the advantages of polyhedral mesh over tetrahedral mesh are pointed out in the paper.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 1; 79-88
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: An analytical study of couple stress fluid through a sphere with an influence of the magnetic field
Autorzy:: Krishna Prasad, Madasu
Sarkar, Priya
Powiązania:: https://bibliotekanauki.pl/articles/2202037.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: creeping flow
sphere
magnetic effect
couple stress fluid
drag
przepływ pełzający
kula
efekt magnetyczny
Opis:: The present work concerns to study of the steady, axisymmetric slow flow of couple stress fluid through a rigid sphere in the transverse magnetic field. Boundary conditions on the sphere surface are the zero couple stress condition and tangential slip condition. The stream function, vorticity vector, and pressure term are obtained. The drag acting on the sphere in the presence of MHD is calculated. Here, we graphically represented the Hartmann number, couple stress, and slip parameters effect on the drag coefficient. Some well-known results of the drag are deduced.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 3; 99--110
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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