Numerical Simulation of the Contaminant Release Through the Sediment-Overlying Water Interface
On the condition that the overlying water flow does not lead to sediment suspension,numerical researches are carried out for the contaminant release mechanism through the sediment-overlying water interface.The overlying water flow is calculated using the k-ε turbulence model.The sediment is regarded as isotropic homogeneous porous medium,thereforc the seepage field in the porous sediment layer is obtained by solving Darcys equations.Several two dimensional coupled steady flow of the overlying water and the pore water in the sediment are calculated.Based on the flow fields obtained,the unsteady contaminant solute transportation process in the sediment and the overlying water is numerically simulated,as the shapes of the sediment-overlying water interface are flat or periodic triangular respectively.Numerical results show that the exchange of the pore water and the overlying water is an important factor which decides the release flux of the contaminant from the sediment to the overlying water.The non-uniform pressure distribution along the sediment-overlying water interface may induce the seepage of the pore water in the sediment and through the sediment-overlying water interface,which may increase the release flux of the contaminant from the sediment to the overlying water.
S.ZHENG J.GUO D.WANG
Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University,China200072
国际会议
Sixth International Conference on Nonlinear Mechanics(第六届国际非线性力学会议)(ICNM-VI)
上海
英文
482-488
2013-08-01（万方平台首次上网日期，不代表论文的发表时间）