TY - EJOU
AU - Bensouici, Fatima-zohra
AU - Boudebous, Saadoun
TI - Mixed Convection of Nanofluids inside a Lid-Driven Cavity Heated by a Central Square Heat Source
T2 - Fluid Dynamics \& Materials Processing
PY - 2017
VL - 13
IS - 3
SN - 1555-2578
AB - A numerical work has been performed to analyze the laminar mixed convection of nanofluids confined in a lid driven square enclosure with a central square and isotherm heat source. All the walls are cooled at constant temperature, and the top wall slides rightward at constant velocity. The simulations considered four types of nanofluids (Cu, Ag, Al_{2}O_{3} and TiO_{2})-Water. The governing equations were solved using finite volume approach by the SIMPLER algorithm. Comparisons with previously published work are performed and found to be in good agreement. The influence of pertinent parameters such as Richardson number, size of the heat source, solid volume fraction and type of nanofluid, on the heat transfer characteristics of mixed convection is studied. For all the simulations, the Reynolds number is fixed to Re=100. The results show that a better cooling of the heat source is obtained at a size of S=0.25 for copper-water nanofluid at Ri=100 where the buoyancy is stronger. As a consequence, we can economise the lid driven energy. The results also show that adding nanoparticles into pure water improves heat transfer in the enclosure. Furthermore, Copper and Silver-water nanofluids yield the best heat transfer enhancement in comparison with the other nanofluids.
KW - Mixed convection
KW - nanofluid
KW - lid-driven cavity
KW - heat source
KW - numerical simulation
KW - heat transfer enhancement
DO - 10.3970/fdmp.2017.013.189