Numerical Analysis of Soil-Water Flow in Fixed Horizontal Pipe

摘要

The flow through unsaturated porous media is governed by extension of Darcy's law and Richard differential equation. These equations generally presented in standard forms as "h-based", "θ-based" and "mixed" form. A finite difference techniques using forward Euler time-marching coupling simulation approach for soil-water content-pressure head curve, is presented in this paper. Fokker-Planck equation backed by effective saturation, Θ and relative hydraulic conductivity, Kr is solved. Spherical monochromatic porous media packing is considered for simulation. Result obtained from simulation are further presented for simulation period and compared with observed hydraulic conductivity data. The simulation is found to be reasonable accurate for predicting unsaturated flow properties in soil water retention curve like variation characteristic of matric potential, moisture content, hydraulic conductivity with respect to rig linear dimension variation.