FSI - Recent Threads

Deformation scaling in scPOST

Oscar Lorenzo Rodriguez — Tue, 03 Jun 2025 08:55:13 GMT

Hello community,

I am performing a co-simulation between Marc and scFLOW. I have displayed the results of both the structural and fluid analyses in scPOST, as I understand this is possible. However, since the deformation on the structural side is small, it is difficult for me to interpret the results. Is there a way to enlarge the deformation to better visualize what is happening?

Thank you very much in advance! Kind regards.

RE: Deformation scaling in scPOST

Oscar Lorenzo Rodriguez — Tue, 03 Jun 2025 10:12:28 GMT

Great! This is what I was looking for. Thank you very much for your quick response, Sachin 🙂

RE: Deformation scaling in scPOST

Sachin Pande — Tue, 03 Jun 2025 09:53:19 GMT

1. Click on Filename

2. Select [Deform] tab

3. Select [Displacement] for Displacement Vector

4. Change [Deformation Scale Factor]

Please refer image below

With deformation scale of 1

With deformation scale of 5

RE: What type of mesh deformation do you use in scFLOW in case of FSI?

Laurent Delmas — Mon, 24 Mar 2025 09:19:32 GMT

Thanks that's helpful
does anyone have other experience linked to membrane inside the pump or scroll compressor or even large detailed wings

What type of mesh deformation do you use in scFLOW in case of FSI?

Laurent Delmas — Fri, 21 Mar 2025 04:34:46 GMT

When dealing with FSI, what type of mesh deformation algorithm do you use versus the target application.

Pump with membrane, wing, foil, ...

RE: What type of mesh deformation do you use in scFLOW in case of FSI?

Oscar Lorenzo Rodriguez — Mon, 24 Mar 2025 09:15:59 GMT

On my side, for cases with small deformations, I normally use the default Harmonic (Poisson Equation). However, in applications where the mesh element distortions are more challenging to handle, such as with significant component rotations or large displacements, I opt for the LDC (Linear Displacement Combination) or RBF (Radial Basis Function), adjusting the number of control points.

RE: Best practices to improve stability on scFLOW side?

Laurent Delmas — Wed, 05 Mar 2025 07:49:38 GMT

When dealing with FSI and associated mesh deformation, this could lead to unwanted low-quality mesh elements, depending on the mesh deformation algorithm used (Harmonic, LDC, or RBF).
The scFLOW Log file is the first file to be analysed to see if there is

negative mesh element appears
sufficient loop number to converge between physical time steps
courant number no too big to be computed in a stable way

Best practices to improve stability on scFLOW side?

Oscar Lorenzo Rodriguez — Tue, 04 Mar 2025 10:59:00 GMT

Hello everyone,

When dealing with challenging Marc - scFLOW analysis and encountering stability issues on the CFD side, are there any good practices to follow to improve the robustness of the simulation in scFLOW side?

Is Steady static is supported in Nastran -scFLOW ?

Ravi Aithal — Thu, 03 Oct 2024 07:06:29 GMT

Is Steady static is supported in Nastran -scFLOW ?

RE: Is Steady static is supported in Nastran -scFLOW ?

Laurent Delmas — Thu, 03 Oct 2024 07:11:04 GMT

(missing image)

here is an example of static coupling between scFLOW and Nastran

RE: Is Steady static is supported in Nastran -scFLOW ?

Sachin Pande — Thu, 03 Oct 2024 07:09:22 GMT

Yes, steady/Static is supported, but only in displacement-pressure/force vector coupling.

For Temperature load coupling and 6DOF separation is not supported.