How can I stop water movement in TMVOC?

How can I stop water movement in TMVOC?

I was told to put the residual water saturation of the material, which I think is  CP(2), equals water saturation of cells. I did but there is still water flow in my domain. 

How can I stop water movement and just have gas transport?

Thank you

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  • Madjid,

    You need to set the residual liquid saturation in the relative permeability function (not the capillary pressure function) greater than whatever you think is the maximum liquid saturation you expect in all the grid blocks assigned to that material type. Which parameter that is (e.g., RP(1) or RP(2) etc.) depends on the function you choose - please check the manual. Beware, however, that the value of the residual liquid saturation often also affects the relative permeability of the other phases. I hope you only want to apply this to boundary elements.

    Stefan

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  • Dear Stefan 

    Thanks for your reply. I did what you suggested, but I still have water flow. I used all the IRP under different water saturations and water flow occurred in all the cases. I am attaching one example that I used for IRP=3.  

    Why do I still have water movement?

    Thanks for all your help

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  • Madjid,

    I looked at your output file and don't see any water fluxes. Please check again. Also, you set RP(1)=0.3, which is exactly the value of liquid saturation, not greater than the value, as I suggested. Set it to a slightly higher value (0.301 should suffice), and you are likely to get rid of even the spurious "flux" of 1E-25.

    Stefan

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