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-   -   Writing a Periodic sinusoidal field function for a wall boundary condition?? (http://www.cfd-online.com/Forums/star-ccm/114581-writing-periodic-sinusoidal-field-function-wall-boundary-condition.html)

smorls March 13, 2013 12:53

Writing a Periodic sinusoidal field function for a wall boundary condition??
 
Hi all,

I'm using STAR CCM+ version 7 and I'm currently trying to write a field function to define the motion of a wall of an expanding and contracting vessel. The flow is assumed Laminar and a Mesh morpher solver is employed.

I need to apply a periodic sinusoidal function to the wall such that the radius varies with time. The radius of this region should expand from 60Ám to 120Ám and contract from 120Ám to 60Ám over a period of 3 seconds (1 Cycle).

The wall motion is being applied as a boundary condition, so no FSI modelling is currently involved.

I'm having great difficultly with this task, any help at all would be greatly appreciated.
Cheers

phanh September 3, 2014 10:31

Dear Smorls,

Have you solved your problems? I would like ask you about this problem?

Best regards,
Quote:

Originally Posted by smorls (Post 413740)
Hi all,

I'm using STAR CCM+ version 7 and I'm currently trying to write a field function to define the motion of a wall of an expanding and contracting vessel. The flow is assumed Laminar and a Mesh morpher solver is employed.

I need to apply a periodic sinusoidal function to the wall such that the radius varies with time. The radius of this region should expand from 60Ám to 120Ám and contract from 120Ám to 60Ám over a period of 3 seconds (1 Cycle).

The wall motion is being applied as a boundary condition, so no FSI modelling is currently involved.

I'm having great difficultly with this task, any help at all would be greatly appreciated.
Cheers


smorls September 11, 2014 05:12

Hi phanh,

I made some progress yes, the work i was doing was for a little side project so i have not looked at it in over a year.
What are you looking to find out?


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