Fluent intrinsic structural FSI solver

destroy · September 6, 2021, 19:42

Dear all,

I am using the fluid-structure interaction (FSI) approach with coupling of Mechanical and Fluent. It is working by transferring data (integrated pressure, displacements etc.) between solvers by multiple so-called coupling iterations.

Recently I discovered, that Fluent itself has an option to use build-in simple structural solver to facilitate FSI simulation. I will use this approach and compare the results with the standard approach described above. However, I do not understand, and I did not found the information in theory guide, on how the intrinsic FSI solver works. I mean, are there any coupling iterations? Or there is created a monolithic matrix, as in monolithic solvers such as Abaqus?

Kind regards

Destroy

lzhaok6 · June 13, 2022, 22:30

Intrinsic FSI in FLUENT still use a partitioned scheme, solving fluid by CFD and solid by FEM. However, there is a few limitations such as thermal expansion is not captured and the structure Young's modulus has to be constant, which I don't understand why.

September 6, 2021, 19:42	Fluent intrinsic structural FSI solver	#1
destroy Member Marcin Join Date: Jun 2016 Posts: 98 Rep Power: 10	Dear all, I am using the fluid-structure interaction (FSI) approach with coupling of Mechanical and Fluent. It is working by transferring data (integrated pressure, displacements etc.) between solvers by multiple so-called coupling iterations. Recently I discovered, that Fluent itself has an option to use build-in simple structural solver to facilitate FSI simulation. I will use this approach and compare the results with the standard approach described above. However, I do not understand, and I did not found the information in theory guide, on how the intrinsic FSI solver works. I mean, are there any coupling iterations? Or there is created a monolithic matrix, as in monolithic solvers such as Abaqus? Kind regards Destroy

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Dynamic FSI with SU2 Compressible Solver and SU2 FEM Solver Diverges when restarted	sangeet	SU2	7	August 3, 2022 02:54
[ANSYS Meshing] Help with element size	sandri_92	ANSYS Meshing & Geometry	14	November 14, 2018 08:54
Compressible Solver Implementation in FSI Library (Foam-extend 3.2)	KarthickRajkumar	OpenFOAM Programming & Development	1	January 4, 2017 07:45
FSI Structural convergence problem	Blizzard99	CFX	13	December 23, 2014 04:45
couple OF with ext. structural solver: how to interpolate BC	matteoL	OpenFOAM	0	July 29, 2010 09:30

June 13, 2022, 22:30		#2
lzhaok6 New Member Join Date: Jul 2016 Posts: 28 Rep Power: 10	Intrinsic FSI in FLUENT still use a partitioned scheme, solving fluid by CFD and solid by FEM. However, there is a few limitations such as thermal expansion is not captured and the structure Young's modulus has to be constant, which I don't understand why.