Hydro-thermal performance on the two phase nanofluid convection heat transfer using the LBM-FD method

Abstract

This paper is dedicated to the investigation of nanofluid natural convection inside a 2D cavity with various kinds of cold walls. To consider the different nanoparticle distribution in the cavity, Buongiorno’s two-phase model is used. The equations are solved by the homemade hybrid Lattice Boltzmann-Finite Difference (LBM-FD) code. It found that although the nanoparticle concentration is almost uniform inside the cavity, the apparent difference can be observed around the walls and edges of the vortices. The nanoparticles have higher concentrations around the cold wall and the lower concentration adjacent to the hot wall. For all cases, the local and average Nusselt number increases by increasing the solid volume fraction of nanofluid. The configuration of cold walls affects the flow pattern and distribution of temperature significantly. By applying the combination of right-angle and inclined walls, the best heat transfer performance for the present system.