低渗透多孔介质中溶质运移的灰色数值模拟

针对低渗介质中启动压力梯度难以确定的问题,将启动压力梯度等参数视为未确知变量,并以灰参数的形式表示,建立了低渗多孔介质中的地下水水质模拟的灰色数学模型.在数值求解过程中,对一维低渗介质中地下水水污染的灰色模型求解过程中有限差分法的截断误差进行了修正,得到了一种具有特殊结构的数值模型,并且给出了求解这类模型的灰色数值算法.通过实例表明,该方法是可行的,模拟结果是合理的.

Gray numerical simulation of contaminant transport in low- permeability porous media

It is difficult to determine the starting pressure gradient in low-permeability reservoirs.In accordance with this problem,a gray mathematical model for simulating the groundwater flow in low-permeability media is established,in which the starting pressure gradient is as a gray unknown variable.In the process of solving the 1D gray mathematical model,a special structural numerical model is obtained through the revision of the truncation errors of finite difference method,and the gray numerical algorithm for solving this kind of models is presented.A case shows that it is feasible and reliable to use this algorithm to simulate the contaminant transport of groundwater in low-permeability porous media.