Learning Forum

[nindoumon]

In my 2-way FSI of aortic valve, when the leaflets of valve close completely, the simulation failed for the splitting of the fluid domain. And I find the solution for this problem in a paper: a minimum distance should be imposed between the leaflets to keep a gap when the valve closed. But I don't know how to set such contact in ANSYS? Does any one know the setting way? Any help will be deeply appreciated.

[peteroznewman]

In the Contact Details, use an Offset parameter to prevent the structural walls from touching when the Frictional Contact is closed.

[nindoumon]

Thank you for you kind reply. However, I cannot find such selection in the Contact Details.
I think the offset in the Geometric Modification cannot handle my problem.
My contact setting is bellowing. Would you please give me some advice?

[peteroznewman]

I can see it on that image, it is the last line.

[nindoumon]

Thank you for your kind reply.
I searched the use of offset.
In the referrence, it means to move contact detection by value.
Positive value brings two separated parts closer.
But I don't know whether it is right to set a negative value for preseving a gap between two leaflets.
Is it ok to set a negative value in the offset?
Help to hear from you.
Thank you very much.

[peteroznewman]

Yes, use a negative value of offset to leave a gap between the contact and target surfaces of a frictional contact when the contact elements are in the closed state.