Numerical determination of permeability, inertial and interfacial heat transfer coefficients of a metal foam by using micro-tomography images

抄録

The use of metal foams is one of the recent popular passive heat transfer enhancement methods due to their remarkable increase in effective thermal conductivity. In order to analyze heat and fluid flow in metal foams in the manner of volume averaged quantities, macroscopic transport parameters such as permeability, inertia and interfacial convective heat transfer coefficients should be well-known. In this study, determination of macroscopic transport parameters is done by using x-ray micro-tomography images. A metal foam with pore density of 20 PPI is considered in this study. The flow simulations are conducted for air flow at steady state and in laminar flow regime.