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Pipe fluid interaction

I'm trying to perform modal analysis of a closed pipe with fluid inside it. For fluid, i used MAT10 card and PFLUID fctn property. I created nodesets for fluid and structure interaction faces, and using ACMODL cards, defined FSETS and SSETS. Also I'm getting the .interface file but I'm not getting the pipe-fluid modes.. Not sure where I'm doing wrong..

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Rahul Rajan_21763

Hi,

If you are using EIGRL card to extract the fluid modes set the case control command as below

METHOD ( FLUID) = 1

Where '1' refers to the identification number of EIGRL card

Rest of the things remains same as normal structural mode extraction method

Regards

Rahul R

Altair Forum User

Hi Rahul,

Yes for fluid modes I'm using METHOD(FLUID) = ID no. of EIGRL card, but I'm getting two different modes, i.e one for structure and other for fluid.. I want coupled modes of structure-fluid interaction..

Altair Forum User

Bump..

Any way to get coupled modes by applying boundary conditions to fluid elements ?

Rahul Rajan_21763

Hi,

See attached screenshot from user guide.

Regards

Rahul R

<?xml version="1.0" encoding="UTF-8"?>