Posted Fri, 03 Jun 2016 09:28:59 GMT by Kettermann
I'm a beginner with FEFlow, and this is probably a very easy problem I'm having, but unfortunately I'm the only one around here working flow modelling, so I have to ask you for help.

I'm trying to simulate flow in an analog experiment, where I have a fully saturated sand body, with an outflow at the bottom (constant hydraulic head). The sand body has a topography and is covered by a water-body with a constant hydraulic head that is larger than the bottom hydraulic head. So I basically induce a flux from top to bottom.  through the sand.

The problem I have is that I don't understand how to assign either (1) cells with conductivity values for open water (is that possible?) or (2) assign the hydraulic head of a constant water level above the topographically uneven sand body.

Can anybody help me out here?



Posted Wed, 15 Jun 2016 11:54:41 GMT by Björn Kaiser
To represent the water column by means of the hydrostatic pressure I suggest to assign a fixed Hydraulic-head BC to all nodes of the first slice. Use a value which corresponds to the water-table.

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