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为进一步研究大孔隙率内的湍流特性对多孔介质内输运和燃烧过程的影响,提出多孔介质的一种二维孔隙网络模型.该模型由一系列圆形孔隙体和长方形喉道互相连接而成.采用标准k-ε模型模拟孔隙网络内的微观流场,利用体积平均方法将微观流场计算结果转换为宏观流场的信息,从而可确定宏观模型中修正项系数的值.计算结果与文献[3]提出的模型吻合较好.
In order to further study the influence of turbulent flow characteristics in macroporosity on the transport and combustion in porous media, a two-dimensional pore network model of porous media is proposed. The model consists of a series of circular pores and rectangular throats connected to each other Using the standard k-ε model to simulate the microscopic flow field in the pore network and using the volume average method to convert the microscopic flow field calculation results into the information of the macro flow field, the value of the correction coefficient in the macro model can be determined. The model proposed by [3] is in good agreement.