Heat Transfer Augmentation in a Channel Asymmetrically Filled with Fibrous PorousMedium using Lattice Boltzmann

In this paper, forced convection in a two-dimensionalconduit partially and asymmetrically filled with fibrousporous medium is investigated using numerical latticeBoltzmann method. The fibrous porous medium isformed by regular arrangement of solid fibers modeledas square obstacles and located in a cross flow.Asymmetrical thermal boundary conditions has beenimplemented, so that one of the walls is insulated,while the other is kept at constant temperature. Porescale simulation combined with thermal nonequilibrium assumption is applied to the solid phase.Conjugate heat transfer augmentation is achieved bytracing mean Nusselt number on the constanttemperature wall and pressure drop. Effects of thegeometrical parameters such as porous blockeccentricity and blockage ratio are investigated.Obtained results are compared with the case of fullyfilled channel. Results show that there are someoptimum values for the geometrical parameters inwhich maximum heat transfer is obtained.

کلیدواژه ها:

Fibrous porous media ، heat transferenhancement ، LBM approach ، asymmetrically filledchannel ، conjugate heat transfer