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Problem with viscosity equation in COMSOL
Posted Oct 14, 2017, 9:02 p.m. EDT Fluid & Heat, Porous Media Flow Version 5.3 0 Replies
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Hi all I want to simulate (nanopartilce+polymer) species transport in subsurface. I am using two physcis "Transport of diluted species in porous media" and "Darcy Law". There are two studies : Steady state and transient. I have following equation: (vis_sol) = xpoly* log(vis_poly) + xnano* log(vis_nano) + log(vis_water) (equation1)
Here, vis_sol= solution viscosity, vis_poly=polymer viscosity, vis_nano=nano partcile viscosity, vis_water= water viscosity, xpoly = mole of polymer/mole of water [molar fraction] xnano=mole of nanoprtcile/mole of water [molar fraction]
At first I knew vis sol, xpoly, xnano, vis_nano, vis_water. Then I found vis_poly from patameter section. I then used vis_poly in the same equation (equation 1) to find vis_sol in variable section [because this vis_sol is different from lab as it is in subsurface]
Unfortunately, the both steady state and transient model shows error. I know it is due to using one equation for two times but I hope there is a solution. Could any one please help me to find a way out? Thanks Asad
Hello Md. Abdullah Asad
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