Running CFX and Structural Analysis Separately

ashtonJ · April 12, 2012, 23:00

Dear All,

I am modelling FSI in a pipe using Ansys CFX. What I want to do is to run the fluid part first and get time dependent average pressure on the wall. Then use this pressure distribution in structural part to find out how big the wall deformation is.
I am OK with fluid part; however, don't know how to apply the fluid pressure in structural part. Does anyone know how?

Kind regards,
AshtonJ

rogeryang · April 13, 2012, 16:03

You need to import the pressures from CFD into Structural model. Check out the Probe Tutorial in ANSYS Customer Portal area.

stumpy · April 13, 2012, 16:48

Since the case is transient I wouldn't recommend the approach used in the probe tutorial. Using the 2-way/MFX approach, but only sending data in one direction is the first choice. The other option is to use APDL commands to read in the transient loads. I would ask ANSYS support how to do that.

ashtonJ · April 14, 2012, 01:21

Thanks for your helps.

I went through the probe tutorial. As Stumpy said, in this tutorial, a constant pressure load is transferred not transient!

Dear Stumpy, could you please explain a bit more about your recommended options:
2-way/MFX and APDL commands.

Thank you all
Regards,
AshtonJ

April 12, 2012, 23:00	Running CFX and Structural Analysis Separately	#1
ashtonJ Senior Member Ashkan Javadzadegan Join Date: Sep 2010 Posts: 255 Rep Power: 16	Dear All, I am modelling FSI in a pipe using Ansys CFX. What I want to do is to run the fluid part first and get time dependent average pressure on the wall. Then use this pressure distribution in structural part to find out how big the wall deformation is. I am OK with fluid part; however, don't know how to apply the fluid pressure in structural part. Does anyone know how? Kind regards, AshtonJ

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April 13, 2012, 16:03		#2
rogeryang New Member Roger Yang Join Date: Jan 2010 Posts: 1 Rep Power: 0	You need to import the pressures from CFD into Structural model. Check out the Probe Tutorial in ANSYS Customer Portal area.

April 13, 2012, 16:48		#3
stumpy Senior Member Join Date: Apr 2009 Posts: 531 Rep Power: 21	Since the case is transient I wouldn't recommend the approach used in the probe tutorial. Using the 2-way/MFX approach, but only sending data in one direction is the first choice. The other option is to use APDL commands to read in the transient loads. I would ask ANSYS support how to do that.

April 14, 2012, 01:21		#4
ashtonJ Senior Member Ashkan Javadzadegan Join Date: Sep 2010 Posts: 255 Rep Power: 16	Thanks for your helps. I went through the probe tutorial. As Stumpy said, in this tutorial, a constant pressure load is transferred not transient! Dear Stumpy, could you please explain a bit more about your recommended options: 2-way/MFX and APDL commands. Thank you all Regards, AshtonJ