TY - EJOU
AU - Zeghbid, Ilhem
AU - Bessaïh, Rachid
TI - Mixed Convection in a Lid-Driven Square Cavity With Heat Sources Using Nanofluids
T2 - Fluid Dynamics \& Materials Processing
PY - 2017
VL - 13
IS - 4
SN - 1555-2578
AB - This paper presents a numerical study of two-dimensional laminar mixed convection in a lid-driven square cavity filled with a nanofluid and heated simultaneously at a constant heat flux q” by two heat sources placed on the two vertical walls. The movable wall and the bottom wall of the cavity are maintained at a local cold temperature T_{C}, respectively. The finite volume method was used to solve the equations of flow with heat transfer across the physical domain. Comparisons with previous results were performed and found to be in excellent agreement. Results were presented in terms of streamlines, isotherms, vertical velocity profile, and local and average Nusselt numbers for Rayleigh number in the range (Ra=10^{3}-10^{6}), Reynolds number (Re=1-500), solid volume fraction of nanoparticles (ϕ=0-0.10), heat sources locations, and type of nanofluids (Cu, Ag, Al_{2}O_{3} and TiO_{2}). The influence of the relevant parameters such as the Rayleigh number, the Reynolds number and the volume fraction of the nonofluid on the average Nusselt number was studied in detail. It was found that the average Nusselt number increases with the increase of Rayleigh number and solid volume fraction of nanofluids. The results show that the Cu-water nanofluid improves heat transfer, and that the heat sources position has an influence on the flow and thermal fields, and on the local and average Nusselt numbers.
KW - Mixed convection
KW - heat sources
KW - cavity
KW - nanofluids
DO - 10.3970/fdmp.2017.013.251