"The fluid-solid interface is not valid..."

rjw · March 12, 2017, 19:27

Attempting to set-up a FSI, and in the transient structural analysis, I get the following message:

"The fluid solid interface load is not valid for multi-step analysis."

I have selected all faces that will participate in the analysis, but I still get this declaration. Is there a trouble-shooting guide to eliminate this kind of error?My model is not overly complex.

anishthapa · August 5, 2023, 13:43

Dear sir,

I am facing similar issue. "The fluid solid interface load is not valid for multi-step analysis."

I was wondering if you had found the solution to defining Fluid Solid Interface in multi-step FSI.

Any suggestion would be appreciated.

Thank you.

Fanxian · August 15, 2023, 04:28

Dear sir,

I am also facing the same issue, have you solved this problem？

Farkin · March 7, 2024, 04:27

In this case, I try to make sure that the mesh settings are compatible with multi-step FSI. I look for mismatches between the fluid and solid meshes, especially in the interfaces.

March 12, 2017, 19:27	"The fluid-solid interface is not valid..."	#1
rjw New Member Richard Join Date: Feb 2017 Posts: 12 Rep Power: 9	Attempting to set-up a FSI, and in the transient structural analysis, I get the following message: "The fluid solid interface load is not valid for multi-step analysis." I have selected all faces that will participate in the analysis, but I still get this declaration. Is there a trouble-shooting guide to eliminate this kind of error?My model is not overly complex.

August 5, 2023, 13:43	Similar issue: Help!	#2
anishthapa New Member anish Join Date: Aug 2023 Posts: 2 Rep Power: 0	Dear sir, I am facing similar issue. "The fluid solid interface load is not valid for multi-step analysis." I was wondering if you had found the solution to defining Fluid Solid Interface in multi-step FSI. Any suggestion would be appreciated. Thank you.

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August 15, 2023, 04:28		#3
Fanxian New Member 河南 Join Date: Aug 2023 Posts: 1 Rep Power: 0	Dear sir, I am also facing the same issue, have you solved this problem？

March 7, 2024, 04:27		#4
Farkin New Member Join Date: Mar 2024 Posts: 3 Rep Power: 2	In this case, I try to make sure that the mesh settings are compatible with multi-step FSI. I look for mismatches between the fluid and solid meshes, especially in the interfaces.