O. Laguerre,S. Ben Amara,G. Alvarez,D. Flick.Transient heat transfer by free convection in a packed bed of spheres: Comparison between two modelling approaches and experimental results[J].Applied Thermal Engineering,2007(1).
W.W.M. Siu,S.H.-K. Lee.Effective conductivity computation of a packed bed using constriction resistance and contact angle effects[J].International Journal of Heat and Mass Transfer,2000(21).
G. Buonanno,A. Carotenuto.The effective thermal conductivity of a porous medium with interconnected particles[J].International Journal of Heat and Mass Transfer,1996(2).