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-   -   absorption in porous media (http://www.cfd-online.com/Forums/flow-3d/27288-absorption-porous-media.html)

Marjon van Ginneken November 17, 2008 11:57

absorption in porous media
 
I am modelling ink impact and absorption in porous media and I was looking at the influence of the grid size on the solution. Refining the grid at first gave similar results (up to 1e-3 s), but as I increased computation time (1e-2 to 1 s) the fine grid ink droplets show sooner equilibrium state than coarse grids. Moreover the absorption and spreading in coarser grids keep continuing in time. Why is this happening? Marjon

michael barkhudarov November 17, 2008 23:37

Re: absorption in porous media
 
hmmm, not sure. What numerical options (e.g., implicit/explicit) and physical models (surface tension, flow losses in porous medial, capipllary pressure) are you using?


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