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how to find the apparent viscosity of non-Newtonian fluid in fluent? |
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Member
mln
Join Date: Dec 2019
Posts: 39
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Hello
I am trying to model bubble column reactor having a non-Newtonian liquid as primary phase and air. I have used shear dependent non-Newtonian power law model. I want to find the apparent viscosity of the liquid. 1) Would like to know whether the molecular viscosity that Fluent determines is the same as the apparent viscosity. I checked the contour plot of the molecular viscosity for the liquid and the mixture in my simulation. But, I found that the upper and lower limit of the viscosity range for the liquid is always equal to the maximum viscosity that I entered while defining the fluid. Also, the viscosity range for the mixture, however, shows the range I defined initially. That is, mixture viscosity values are giving me results expected for the liquid. I am confused with this result ![]() 2) Even the shear rate (strain rate in fluent) is not within the expected range (i.e, based on the non-Newtonian power law formula). Kindly help. thank you |
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Tags |
bubble column, non-newtonian, viscosity determination |
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