Two way fluid structure interaction of flexible plate

sreemvlk · January 14, 2014, 12:35

Hi all,
I am trying to perform a two-way fluid structure interaction of a flexible plate under the effect of fluid flow over it.I am doing the problem in ANSYS WORKBENCH 14.0 by coupling CFX and TRANSIENT STRUCTURAL systems.I have even solved a problem in which, first the structure is excited by a force and then its effect on fluid around it.Here the pressure applied on structure was known and hence that was not much hard.
But my actual problem is how to transfer the loads exerted by the flowing fluid to the structure,!!!???...I dont know how to transfer the values of fluid forces exerted by flow to the structure...!!
Please help me on this problem..
Sree

levivad · January 22, 2014, 06:03

Describe your problem some more.
Is the flow parallel to the plate (grazing flow) or is it perpendicular (impinging on the plate) is the flow compressible? What are the boundary conditions?

I am solving a similar problem using fluent and may be able to help.

sreemvlk · February 3, 2014, 13:51

Hi levivad,
First of all thanks for responding to my problem.
In my problem the flexible wing is fixed at the bottom and flow is over the plate perpendicular to the plate.
I am trying to do the problem in a velocity of 5-10 m/s.I have taken inlet velocity boundary condition and pressure outlet=0 Pa .
I would like to calculate the force exerted by the perpendicular flow over the plate.
Thank you,
Sree.

sreemvlk · February 4, 2014, 04:04

Fluid domain for my problem is attached here..the plate is fixed at bottom at the centre of the domain as shown..

levivad · February 5, 2014, 13:05

well this is basically the same as the tutorial in CFX.
Follow tutorial 23 in the Ansys CFX help. you only need to change the inlet velocity.
if you want the total force on the plate you can add a monitor on drag and lift.
alternatively you can compute it in CFD-post

sreemvlk · April 28, 2014, 03:42

thank you levivad..

sreemvlk · April 30, 2014, 05:34

miller 3.jpg

miller 1.jpg

miller 2.jpg

January 14, 2014, 12:35	Two way fluid structure interaction of flexible plate	#1
sreemvlk New Member sree Join Date: Jan 2014 Posts: 13 Rep Power: 12	Hi all, I am trying to perform a two-way fluid structure interaction of a flexible plate under the effect of fluid flow over it.I am doing the problem in ANSYS WORKBENCH 14.0 by coupling CFX and TRANSIENT STRUCTURAL systems.I have even solved a problem in which, first the structure is excited by a force and then its effect on fluid around it.Here the pressure applied on structure was known and hence that was not much hard. But my actual problem is how to transfer the loads exerted by the flowing fluid to the structure,!!!???...I dont know how to transfer the values of fluid forces exerted by flow to the structure...!! Please help me on this problem.. Sree

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January 22, 2014, 06:03		#2
levivad New Member Join Date: May 2013 Posts: 12 Rep Power: 13	Describe your problem some more. Is the flow parallel to the plate (grazing flow) or is it perpendicular (impinging on the plate) is the flow compressible? What are the boundary conditions? I am solving a similar problem using fluent and may be able to help.

February 3, 2014, 13:51		#3
sreemvlk New Member sree Join Date: Jan 2014 Posts: 13 Rep Power: 12	Hi levivad, First of all thanks for responding to my problem. In my problem the flexible wing is fixed at the bottom and flow is over the plate perpendicular to the plate. I am trying to do the problem in a velocity of 5-10 m/s.I have taken inlet velocity boundary condition and pressure outlet=0 Pa . I would like to calculate the force exerted by the perpendicular flow over the plate. Thank you, Sree.

February 5, 2014, 13:05		#5
levivad New Member Join Date: May 2013 Posts: 12 Rep Power: 13	well this is basically the same as the tutorial in CFX. Follow tutorial 23 in the Ansys CFX help. you only need to change the inlet velocity. if you want the total force on the plate you can add a monitor on drag and lift. alternatively you can compute it in CFD-post

April 28, 2014, 03:42		#6
sreemvlk New Member sree Join Date: Jan 2014 Posts: 13 Rep Power: 12	thank you levivad..

April 30, 2014, 05:34		#7
sreemvlk New Member sree Join Date: Jan 2014 Posts: 13 Rep Power: 12	miller 3.jpg miller 1.jpg miller 2.jpg