Modeling a Flexible Body

TiagoFC · February 28, 2016, 16:17

Hello, guys, is it possible to model a flexible wall (like a diaphragm, on a diaphragm pump), like, with the deformation being caused by the pressure near this wall? Thank you!

LuckyTran · February 28, 2016, 19:17

This requires FSI which Fluent doesn't support alone.

But it is possible in workbench. You need to couple Fluent with Mechanical or something like that.

TiagoFC · February 28, 2016, 20:26

Thank you, LuckyTran. I'm trying to do a transient analysis, and this flexiblity will change the outcome (since it is not just a steady state simulation). I thought that FSI would just give me solution to steady problems, since I calculate the "solid" part after I already finished my fluid simulation. Do you think it is possible to solve them at the same time?

LuckyTran · February 28, 2016, 20:52

Transient FSI is two-way coupling and is also supported. But I don't have any experience with it.

Use the transient structural block in workbench.

There's a workbench tutorial on two-way FSI. Look in the Ansys help, it's not in the Fluent help.

TiagoFC · February 28, 2016, 20:53

Great! Thank you again!

February 28, 2016, 16:17	Modeling a Flexible Body	#1
TiagoFC New Member Tiago Fonseca Costa Join Date: Jun 2015 Posts: 9 Rep Power: 10	Hello, guys, is it possible to model a flexible wall (like a diaphragm, on a diaphragm pump), like, with the deformation being caused by the pressure near this wall? Thank you!

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February 28, 2016, 19:17		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,677 Rep Power: 66	This requires FSI which Fluent doesn't support alone. But it is possible in workbench. You need to couple Fluent with Mechanical or something like that.

February 28, 2016, 20:26		#3
TiagoFC New Member Tiago Fonseca Costa Join Date: Jun 2015 Posts: 9 Rep Power: 10	Thank you, LuckyTran. I'm trying to do a transient analysis, and this flexiblity will change the outcome (since it is not just a steady state simulation). I thought that FSI would just give me solution to steady problems, since I calculate the "solid" part after I already finished my fluid simulation. Do you think it is possible to solve them at the same time?

February 28, 2016, 20:52		#4
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,677 Rep Power: 66	Transient FSI is two-way coupling and is also supported. But I don't have any experience with it. Use the transient structural block in workbench. There's a workbench tutorial on two-way FSI. Look in the Ansys help, it's not in the Fluent help.

February 28, 2016, 20:53		#5
TiagoFC New Member Tiago Fonseca Costa Join Date: Jun 2015 Posts: 9 Rep Power: 10	Great! Thank you again!