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Old   March 8, 2010, 12:37
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Dan
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I'm getting started on a fluid structure interaction problem and I wanted some clarification on one area. The loads transferred from the fluid part to the structural part are the static pressures correct?
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Old   March 9, 2010, 07:04
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I think it is the static pressure that is normal to the structure and when the force is tangential to the structure, it is shear. I am not a master and just want to join in the discussion.
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Old   March 9, 2010, 19:56
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Originally Posted by dss1092 View Post
I'm getting started on a fluid structure interaction problem and I wanted some clarification on one area. The loads transferred from the fluid part to the structural part are the static pressures correct?
Not just so. The shear stress also plays an important role for low Reynolds flow. I am doing the FSI work.
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Old   March 10, 2010, 05:02
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Quote:
Originally Posted by dss1092 View Post
I'm getting started on a fluid structure interaction problem and I wanted some clarification on one area. The loads transferred from the fluid part to the structural part are the static pressures correct?
Actually, you should prescribe the traction vector, Ti, at the surfaces, which is given (in tensor notation) by Ti = Nj Sij and where Sij is the stress tensor (including the viscous part) and Nj is the normal unit vector.
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