[solids4Foam] How to apply a constant force on a solid during solids4foam fluid-structure coupling?

y99 · September 24, 2023, 05:16

When conducting fluid-structure coupling simulations for a flexible cylinder, I've been trying to apply a tensile force on the top surface of the solid using the "solidTraction" boundary condition in the solid solver's initial conditions. However, the calculation quickly diverges (it runs well when the top surface is set to "fixedDisplacement"). Could you please advise on how to apply a tensile force on the top surface of the cylinder?
Any suggestions would be greatly appreciated!

iBatistic · October 30, 2023, 11:40

Can you provide more information about the boundary conditions and geometry of your case? If the solid does not have a prescribed displacement on any patch, this may cause the problem (the body is floating in space - that's why it can converge when you prescribe it).

September 24, 2023, 05:16	How to apply a constant force on a solid during solids4foam fluid-structure coupling?	#1
y99 New Member ysh Join Date: Nov 2022 Posts: 5 Rep Power: 4	When conducting fluid-structure coupling simulations for a flexible cylinder, I've been trying to apply a tensile force on the top surface of the solid using the "solidTraction" boundary condition in the solid solver's initial conditions. However, the calculation quickly diverges (it runs well when the top surface is set to "fixedDisplacement"). Could you please advise on how to apply a tensile force on the top surface of the cylinder? Any suggestions would be greatly appreciated!

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October 30, 2023, 11:40		#2
iBatistic New Member Ivan Batistić Join Date: Sep 2022 Location: Zagreb, Croatia Posts: 14 Rep Power: 4	Can you provide more information about the boundary conditions and geometry of your case? If the solid does not have a prescribed displacement on any patch, this may cause the problem (the body is floating in space - that's why it can converge when you prescribe it).