Bingham plastic
I use the Hershel-Berkley viscosity model, because the material that i am modeling is non-newtonian, bingham plastic.(Paste.)
Solver setting is, Unsteady, Laminar, Vof. I need to change the Paste's viscosity and yield stess value with every time step and calculation. However, the hershel-berkley viscosity model has 4 sections, 1) K - consistency index, but for bingham model, the value has to be viscosity of the material 2) power index, n 3) yield stress 4) yield viscosity(for bingham model, this value must be very large, so I give the value 10 thousand) I need to change the (1) and (3) value with time. I think that I have to use UDF for the process, but there's one problem. I don't have the source code for the Hershel-berkley viscosity. What can I do? |
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