摘要
针对液态溶质在土壤中的渗流问题,利用数学模型描述了符合达西定律的二维非稳定渗流,并运用有限体积法对该模型进行了数值求解.得出了给定渗流场不同渗透系数、单位贮藏量下的水头、渗流量的变化规律,模拟了液态溶质在土壤中的渗流过程.通过对计算结果的可视化处理、比较分析,发现渗透系数、单位贮藏量等因素对液态溶质在土壤中的运移都有不同程度的影响,渗透系数越小,液态溶质运移速度越慢;单位贮存量越小,液态溶质运移速度越快;反之亦然.
For the sake of the seepage problem of liquid solute in soil, a mathematical mod- el has been used to describe the two-dimensional unsteady seepage conformed to Darcy＇ s law, and the finite volume method is applied to do numerical solution of the given model. By these work, we can get different osmotic coefficients of the given seepage field, head un- der unit of storage capacity and change rule of seepage discharge and stimulate percolation process of the liquid solute in soil. Based on visualization processing and comparative anal- ysis of the computed result, we find that both permeability coefficient and unit of storage capacity have a different degree of influence on liquid solute migration in soil. And, we also conclude that the smaller osmotic coefficient it is, the slower speed of the liquid solute transports ;the smaller unit of storage capacity it is, the faster speed 0f the liquid solute transports and vice versa.
出处
《南华大学学报（自然科学版）》
2015年第4期63-68,共6页
Journal of University of South China：Science and Technology
关键词
溶质运移
渗流
达西定律
有限体积法
数值模拟
solute transport
seepage
Darcy＇s law
the finite volume method
numerical sim- ulation
