Writing a Periodic sinusoidal field function for a wall boundary condition??

smorls · March 13, 2013, 11:53

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 60µm to 120µm and contract from 120µm to 60µm 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

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 60µm to 120µm and contract from 120µm to 60µm 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?

March 13, 2013, 11:53	Writing a Periodic sinusoidal field function for a wall boundary condition??	#1
smorls New Member Join Date: Mar 2013 Location: Ireland Posts: 10 Rep Power: 12	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 60µm to 120µm and contract from 120µm to 60µm 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

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
An error has occurred in cfx5solve:	volo87	CFX	5	June 14, 2013 17:44
Compile problem	ivanyao	OpenFOAM Running, Solving & CFD	1	October 12, 2012 09:31
[blockMesh] error message with modeling a cube with a hold at the center	hsingtzu	OpenFOAM Meshing & Mesh Conversion	2	March 14, 2012 09:56
problem about periodic boundary condition in Fluent	winnawinna	FLUENT	0	December 28, 2010 23:32
applying boundary condition on rotating wall	Haris Maharana	Siemens	2	January 16, 2001 12:03

September 11, 2014, 05:12		#3
smorls New Member Join Date: Mar 2013 Location: Ireland Posts: 10 Rep Power: 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?