CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   CFX (https://www.cfd-online.com/Forums/cfx/)
-   -   Considering time value in the boundary profile? (https://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
......

 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

 All times are GMT -4. The time now is 05:38.