PULSATING FLOW AND HEAT-TRANSFER IN AN ANNULUS PARTIALLY FILLED WITH POROUS-MEDIA

A numerical study is made of heat transfer characteristics from pulsat ing flow in a concentric annulus partially filled with porous media. T he unsteady Navier-Stokes equations with the Brinkman-Forchheimer-exte nded Darcy model in the porous region are solved by using finite volum e techniques. Changes in convective heat transfer and in effective axi al heat conduction due to pulsation are investigated over broad ranges of the relevant parameters, i.e., the thickness of the porous layer a nd the frequency and amplitude of pulsation. The results obtained indi cate that the effective axial thermal conductivity is substantially in creased by pulsation, and this augmentation is more pronounced by part ial fillings of porous material.