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Shear strain rate insertion at Bingham plastic model |
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May 12, 2020, 11:36 |
Shear strain rate insertion at Bingham plastic model
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#1 |
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Ahammed Rubel
Join Date: Jun 2019
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Dear Experts,
I want to simulate magneto-rheological fluid damper. Here I want to use default Bingham Plastic model at CFX. I have calculated Shear Stress for different current density by using APDL Electromagnetic . Shear Stress average value [(Bmax+Bmin)/2] =3186.55 T. Should I put this value as yield stress? For a specific shear stress how can I calculate Shear Strain Rate maximum and minimum value. For Bingham Plastic model which data need to insert? |
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May 12, 2020, 13:44 |
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#2 |
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Join Date: Jun 2009
Posts: 1,875
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A Bingham fluid is defined by its Yield Stress and Viscosity Consistency (see ANSYS CFX documentation for details).
I understand a magneto-rheological fluid as fluid where its properties can be a function of magnetic field variables, say B or H. I would translate that as Yield Stress = Function F (B or H, Temperature, etc) Viscosity Consistency = Function G (B, or H, Temperature, etc) The shear strain rate limits are to control the numerics of how the viscosity is treated in the equations, they are not a physical property of the material. What are the F and G above? You should look for that information in the literature for that material.
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