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Forum: CFX

May 18, 2011, 03:32

Replies: 10

Folded mesh in two way FSI

Views: 3,027

Posted By Lance

Also, if you click the Mesh Refinement button in...

Also, if you click the Mesh Refinement button in PRE, there's a text saying:
"Mesh adaptation is unavailable for [...], cases with external solver coupling, [...], transient, [...], mesh motion,...

Forum: CFX

May 17, 2011, 01:39

Replies: 10

Folded mesh in two way FSI

Views: 3,027

Posted By Lance

Say that your wall moves 0.1 mm in 1e-4 s =>...

Say that your wall moves 0.1 mm in 1e-4 s => velocity = 1e-4 m/1e-4 s = 1 m/s => acceleration 1 m/s /1e-4 s = 10000 m/s^2
Need an enormous pressure difference to get your fluid to accelerate at that...

Forum: CFX

May 16, 2011, 09:18

Replies: 10

Folded mesh in two way FSI

Views: 3,027

Posted By Lance

I remember from an Ansys FSI Training course that...

I remember from an Ansys FSI Training course that decreasing the time step could give start up problems.
"Half the time step, acceleration increases by a factor of 4"

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