多孔介质平板通道强迫对流中热局部非平衡时的热应力

根据微观不可压饱和多孔介质热-力-流相互作用的一般理论,在固相骨架小变形的假定下,考虑固相和流相相互作用的粘性耗散,研究了多孔介质平板通道强迫对流热局部非平衡的热应力问题.建立了问题的热-力数学模型,根据饱和多孔介质的平衡方程,在固相骨架只存在横向位移的假定下,求解了固相骨架的位移和相应的热应力,数值考察了各种物性参数对热应力分布的影响,讨论了热局部平衡模型的适用性.

THERMAL STRESS OF LOCAL THERMALLY NONEQUILIBRIUM FOR FORCED CONVECTION IN A POROUS MEDIUM PARALLEL PLATE CHANNEL

Based on the general theory of the thermo-mechanical-hydro couplings of saturated porous media,and take effect of the viscous dissipation due to the interaction between the two phases into account,a thermal stress of the local thermal nonequilibrium for forced convection in a porous medium parallel plate channel is investigated under the assumption of infinitesimal deformation of the solid skeleton.The mathematical model is established for the problem.Then under the assumption that the displacement of the solid phase is in transversal,the displacement and corresponding thermal stress are obtained from the equilibrium equation of porous media.The influences of dimensionless material parameters on the thermal stresses are revealed numerically,and the applicability of model of the local thermal equilibrium is discussed.