at present study the flow and heat transfer of non-newtonian nanofluid, aqueous solution of carboxymethyl cellulose-aluminum oxide with different volume fractions of nano particles in a two dimensional microtube is simulated for the first time. slip velocity and temperature jump boundary conditions are also considered along the microtube walls. the achieved results accuracy is investigated by c...

in this paper, two dimensional natural convection heat transfer in non-square cavities such as triangle, trapezoid, quadrant-circle and semi-circular are investigated via lattice boltzmann method. the prandtl number is taken as 0.71 that corresponds to that of air. the results show that, when the flow pattern consists of two rotating cell, there is a extremum point in the variations of the loca...

A CFD study of an axisymmetric vortex ring interacting with a flat, constant-temperature, heated wall is conducted to the physical nature mechanisms leading deterioration in heat transfer due unsteady boundary layer separation resulting from vortex-wall interaction. The utilizes supplemental computation hypothetical flow configuration which slip allowed at eliminate during Comparison between an...

Effective cooling of electronic equipment has emerged as a challenging and constraining problem of the new century. In the present work the feasibility and effectiveness of jet impingement cooling on electronics were investigated numerically and experimentally. Studies have been conducted to see the effect of the geometrical parameters such as jet diameter (D), jet to target spacing (Z) and rat...

This article reports a numerical study of double-diffusive convection in a fluidsaturated vertical porous annulus subjected to discrete heat and mass fluxes from a portion of the inner wall. The outer wall is maintained at uniform temperature and concentration, while the top and bottomwalls are adiabatic and impermeable to mass transfer. The physical model for the momentum equation is formulate...

The focus of presented numerical study is to investigate the effect of Reynolds number with respect to both heat transfer and flow characteristics in a channel equipped with two triangular bluff bodies in side by side arrangement. (SST) k turbulence model is used for simulations and the second order upwind numerical scheme and SIMPLE (pressure implicit with splitting of operations) algorithm a...