Numerical investigation of mixed convection flow in a concentration-stratified fluid-saturated vertical square porous enclosure is investigated by Galerkin finite element method. The forced flow conditions are imposed by providing an inlet at the bottom wall and an outlet with a suction on the top wall. The free convection is induced by introducing a hot but isothermal temperature on the left v...

In this article, the problem of laminar, isothermal, incompressible and viscous flow in a rectangular domain bounded by two moving porous walls which enable the fluid to enter or exit during successive expansions or contractions is solved analytically by using the differential transform method (DTM). Graphical results are presented to investigate the influence of the non-dimensional wall dilati...

A compressible Hybrid Lattice Boltzmann Method solver is used to perform a wall-resolved Large eddy simulation of an isothermal axisymmetric jet issuing from pipe and impinging on heated flat plate at Reynolds number 23 000, Mach 0.1, impingement distance two diameters. The flow field statistics, Nusselt profile (including the secondary peak), shear stress were well reproduced. azimuthal cohere...

The thermal behavior of a spherical gas bubble in liquid excited by an acoustic pressure signal is investigated constructing iterative solution the energy balance equations between and surrounding uniform approximation. This leads to hierarchy for radial partial derivatives temperature at wall, which control temporal rate change within bubble. In particular, closure relation introduced based on...

Numerical predictions of heat transfer have been made for laminar free and mixed convective from non-isothermal vertical plane surface to supercritical water. Variation all the thermo-physical properties fluid under investigation considered. The numerical scheme employed in present is first validated with respect experimental data isothermal wall conditions good agreement achieved maximum devia...

The analysis of solute and thermal dispersion in pulsatile flow through the stenotic tapered blood vessel is presented. The present problem is an extension of the work done by Ramana et al. who considered the time-invariant arterial wall. In the present model, the flexible nature of the arterial wall through the obstruction (called stenosis) is considered and it is achieved with the he...

This study is considered a fully developed non-isothermal, viscous, incompressible fluid flow that passes through the centerline of rotating square curved duct in presence magnetic field with Hall and ion-slip current. non-isothermal generated by keeping heat on outer wall cool inner wall; upper lower walls are taken as adiabatic. The aspect ratio l = 1 so cross section viewed square. gravitati...

Large-eddy simulation (LES) equipped with the one-equation subgrid-scale (SGS) model is employed to investigate the mean flows and turbulence over idealized two-dimensional (2D) street canyons in various unstable thermal stratifications. The building-height-tostreet-width (aspect) ratio is equalto unity so the flows inside a street canyon are in the skimming flow regime. Periodic boundaries are...

volumetric techniques were employed to study the adsorption of co2 on a purified multi-wall carbon nanotubes (mwnt’s) sample, as a mesoporous material, at isothermal conditions of 288, 293 and 298 k and pressures ranging from 30 to 150 kpa. langmuir, freundlich and sips equations were used to represent the isotherms. also the parameters of these fitted isotherm models have been determined. the ...

A penalty finite element analysis with bi-quadratic elements is carried out to investigate the effects of uniform and non-uniform heating of inclined walls on natural convection flows within a isosceles triangular enclosure. Two cases of thermal boundary conditions are considered; case I: two inclined walls are uniformly heated while the bottom wall is cold isothermal and case II: two inclined ...