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-   -   Considering time value in the boundary profile? (http://www.cfd-online.com/Forums/cfx/22434-considering-time-value-boundary-profile.html)

Aibo April 12, 2006 01:43

Considering time value in the boundary profile?
 
I am trying to simulate fluctated wind pressure of building using cfx10.First, I have used Matlab software to generate the time history of wind velocity;then, I want to add the time history of wind velocity to the inlet boundary condition by using the boundary profile of cfx10 .To this step, the question is how can I reach this target.

List the format what I have tried and failed:
[Name]
My Boundary
[Spatial Fields]
x, y , z...
[Data]
x[m],y[m],z[m],t[s],Velocity u[ms^-1]
1,2,1,0,1
1,2,1,0.5,2
1,2,1,1.5,0.9
......
Need your help,thank you!

TobiasZ April 13, 2006 04:43

Re: Considering time value in the boundary profile
 
Hi,

I guess you need to setup a CEL Expression with something like Function(x,y,z,t,u)in CFX, where x,y,z,t are input and u output data. Create a User Function where to read the data of your txt file and send the data via Function(x,y,z,t,u) back to the boundary condition. I think there are some examples in the CFX manual for CEL or User Junction Box which can you help further.

TobiasZ

Aibo April 13, 2006 07:18

Re: Considering time value in the boundary profile
 
Thank you!! I will try it now!!

AIBO April 19, 2006 22:28

Re: Considering time value in the boundary profile
 
TobiasZ,thank you for your help! I has obtained the real results with using the user cel function.

kjrzyh January 31, 2013 11:46

Quote:

Originally Posted by Aibo
;75937
I am trying to simulate fluctated wind pressure of building using cfx10.First, I have used Matlab software to generate the time history of wind velocity;then, I want to add the time history of wind velocity to the inlet boundary condition by using the boundary profile of cfx10 .To this step, the question is how can I reach this target.

List the format what I have tried and failed:
[Name]
My Boundary
[Spatial Fields]
x, y , z...
[Data]
x[m],y[m],z[m],t[s],Velocity u[ms^-1]
1,2,1,0,1
1,2,1,0.5,2
1,2,1,1.5,0.9
......
Need your help,thank you!

Hi,Aibo.
Now,I meet the same problem with you.Can you tell me how you to solve it?
Thank you! my email : kjrzyh@126.com


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