Natural convection flow simulation of nanofluid in a square cavity using an incompressible generalized lattice boltzmann method

摘要

In this paper, the heat transfer performance in an enclosure including nanofluids is studied. The velocity field is solved by an incompressible generalized lattice Boltzmann method and heat transfer is simulated using single-relaxation-time lattice Boltzmann method. The hydrodynamics and thermal fields are then coupled together using the Boussinesq approximation. The fluid in the square cavity is a Cu-water nanofluid. The effects of Grashof number and solid volume fraction on thermal and hydrodynamic characteristics are investigated. The results obtained clearly show that heat transfer enhancement is possible using nanofluids in comparison to conventional fluids. Comparisons with previously published works are performed and found to be in excellent agreement with existing data.