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Wyszukujesz frazę "slip condition" wg kryterium: Temat


Wyświetlanie 1-8 z 8
Tytuł:
On global motion of a compressible barotropic viscous fluid with boundary slip condition
Autorzy:
Kobayashi, Takayuki
Zajączkowski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1338843.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Hilbert-Besov spaces
compressible barotropic viscous fluid
boundary slip condition
global existence
Opis:
Global-in-time existence of solutions for equations of viscous compressible barotropic fluid in a bounded domain Ω ⊂ $ℝ^3$ with the boundary slip condition is proved. The solution is close to an equilibrium solution. The proof is based on the energy method. Moreover, in the $L_2$-approach the result is sharp (the regularity of the solution cannot be decreased) because the velocity belongs to $H^{2+α,1+α/2}(Ω × ℝ_+)$ and the density belongs to $H^{1+α,1/2+α/2}(Ω× ℝ_+)$, α ∈ (1/2,1).
Źródło:
Applicationes Mathematicae; 1999, 26, 2; 159-194
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of slip parameter, viscous dissipation and Joule heating effect on boundary layer flow and heat transfer over a power-law stretching wedge-shaped surface with the correlation coefficient and multiple regressions
Autorzy:
Ali, Mohammad
Alim, Md. Abdul
Powiązania:
https://bibliotekanauki.pl/articles/2174185.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
warstwa graniczna
lepkość
transfer ciepła
boundary layer
wedge angle
stretching surface
permeability
slip condition
Opis:
The influence of slip parameter, viscous dissipation, and Joule heating parameter on MHD boundary layer nanofluid flow over a permeable wedge-shaped surface was analysed. The PDEs and the associated boundary conditions were transformed to a set of non-similar ODEs and the obtained system of equations was solved numerically with the help of the spectral quasi-linearization method (SQLM) by applying suitable software. This method helps to identify the accuracy and convergence of the present problem. The current numerical results were compared with previously published work and are found to be similar. The fluid velocity, fluid temperature, and nanoparticle concentration within the boundary layer region for various values of the parameters such as the slip effect, magnetic strength, Prandtl number, Lewis number, stretching ratio, viscous dissipation, suction, Brownian motion, Joule heating, heat generation, and thermophoresis are studied. It is observed that the Brownian motion, Joule heating, viscous dissipation, and thermophoresis lead to decreases in the heat and mass transfer rate. The skin friction coefficient enhances with slip, magnetic, permeability, and suction parameters, but reduces with the Brownian motion, wedge angle, and stretching ratio parameters whereas there is no effect of mixed convection, thermophoresis, heat generation parameters, the Prandtl and Eckert number.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 2; 1--21
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Visco-elastic fluid model in an inclined porous stenosed artery with slip effect and body acceleration
Autorzy:
Manisha, Rana
Kumar, Surendra
Powiązania:
https://bibliotekanauki.pl/articles/27312399.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
poślizg
przepuszczalność
tętnica
visco-elastic fluid
slip condition
inclined porous artery
permeability
body acceleration
Opis:
The present paper analyzes an unsteady magnetohydrodynamic blood flow model of an visco-elastic fluid through an inclined porous stenosed artery with body acceleration and slip effect. Navier-Stokes equations have been used to describe the blood flow model. The governing equation of blood flow is solved by an analytic method by considering blood as an incompressible, visco-elastic fluid, and suspension of RBC’s in plasma. Axial velocity, blood acceleration, flow rate, and shear stress are derived numerically by using the finite Laplace and Hankel transformation and their inverse. The effect of parameters such as the visco-elasticity parameter, Womersley number, Hartmann number, inclination angle, parameter of slip, and body acceleration frequency is analyzed. Axial velocity reduces as the Hartmann number and visco-elasticity parameter enhance and it enhances with the enhancement of the slip parameter and inclination angle. The study is beneficial for finding the effect of slip parameter, porosity factor and Hartmann number when a human body is exposed to MRI and CT scan.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 4; 82--104
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preconditioning in the path-following algorithm for the stokes flow with stick-slip conditions
Předpodmínění algoritmu sledování cesty pro stokesovo proudění se skluzovou podmínkou
Autorzy:
Jarošová, M.
Kucera, R.
Šátek, V.
Powiązania:
https://bibliotekanauki.pl/articles/112674.pdf
Data publikacji:
2017
Wydawca:
STE GROUP
Tematy:
Stokes problem
stick-slip condition
interior point method
TFETI method
zagadnienie Stokesa
stan stick-slip
metoda punktu wewnętrznego
metoda TFETI
Opis:
The Stokes problem with the stick-slip boundary condition is solved by the mixed finite element method combined with the TFETI method. An interior point method for the minimization subject to box and equality constraints is used. The preconditioned projected conjugate gradient method solves the inner linear systems. The preconditioners are tested experimentally. The aim of our research is to develop efficient solvers for modelling of a flow over hydrophobic walls that exhibits applications in engineering areas including biomedical modelling or transport of fluid.
Stokesova úloha se skluzovou podmínkou je rešena smíšenou metodou konecných prvku kombinovanou s TFETI metodou. Výpocet rešení se provádí metodou vnitrních bodu urcenou k minimalizaci s oboustraným omezením a rovnostní vazbou. Predpodmínená projektovaná metoda sdružených gradientu se používá pro rešení vnitrních lineárních soustav. Úcinost predpodminovacu se testuje experimentálne. Cílem výzkumu je vyvinout efektivní rešice pro modelování proudení po hydrofobních stenách, což nachází uplatnení v inženýrských oblastech zahrnujících modelování v biomedicíne nebo pri prenosu tekutin.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2017, 6, 4; 274-285
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A numerical approach to slip flow of a micropolar fluid above a flat permeable contracting surface
Autorzy:
Parthiban, R.
Palani, G.
Tinker, Seema
Sharma, R. P.
Powiązania:
https://bibliotekanauki.pl/articles/1839882.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
warstwa graniczna
radiator
płyn mikropolarny
ssanie
boundary layers
heat sink
micropolar fluid
slip condition
suction
injection
Opis:
A plain linear penetrable contracting sheet with slip over a micro-polar liquid with a stagnation-point flow is analyzed. Through similarity mapping, the mathematical modeling statements are transformed as ODE’s and numerical results are found by shooting techniques. The varying impacts of physical quantities on the momentum, micro-rotation, and temperature were demonstrated through graphs. The computed measures including shear and couple stress with distinct measures of factors involved in this proposed problem are presented through a table.
Źródło:
International Journal of Applied Mechanics and Engineering; 2021, 26, 2; 173-185
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
MHD slip flow past an extending surface with third type boundary condition and thermal radiation effects
Autorzy:
Gururaj, A. D. M.
Dhanasekaran, S.
Parthiban, V.
Powiązania:
https://bibliotekanauki.pl/articles/265680.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
promieniowanie cieplne
magnetohydrodynamika
warunki graniczne
third type boundary condition
slip flow
thermal radiation
extending surface
Opis:
MHD slip flow past an extending surface with third type (convective) boundary condition and thermal radiation is analysed. The governing momentum and energy equations are converted into set of nonlinear ordinary differential equations using appropriate similarity transformations. The Fourth-Order Runge-Kutta shooting method is applied for obtaining the numerical solution of the resulting nonlinear ordinary differentia equations. The numerical results for velocity and temperature distribution are found for different values of the vital parameters, namely: the magnetic interaction factor, slip factor, convective factor, Prandtl number and radiation factor and are presented graphically, and discussed.
Źródło:
International Journal of Applied Mechanics and Engineering; 2019, 24, 3; 577-590
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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
    Wyświetlanie 1-8 z 8

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