Forum: Fluent UDF and Scheme Programming
March 8, 2011, 18:35
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Replies: 76
Views: 27,673
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Forum: Fluent UDF and Scheme Programming
February 13, 2011, 22:59
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Replies: 76
Views: 27,673
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Forum: Fluent UDF and Scheme Programming
February 13, 2011, 22:51
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Replies: 76
Views: 27,673
Sorry, I'm afraid I don't have more time to...
Sorry, I'm afraid I don't have more time to troubleshoot this problem in Fluent. I only have the transformation in a simplified version for 2 rotations (assuming the third is 0). Did you say you...
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Forum: Fluent UDF and Scheme Programming
February 13, 2011, 22:23
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Replies: 76
Views: 27,673
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Forum: Fluent UDF and Scheme Programming
February 9, 2011, 12:11
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Replies: 76
Views: 27,673
Aamer, if I'm understanding you right, your...
Aamer, if I'm understanding you right, your problem actually has a very simple solution. Since your wing is starting in the wrong orientation, you can just go to Mesh>Rotate and rotate your entire...
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Forum: Fluent UDF and Scheme Programming
February 8, 2011, 12:45
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Replies: 76
Views: 27,673
Aamer,
To do a simple wing sweep depends on...
Aamer,
To do a simple wing sweep depends on how exactly you want to do the sweep. If it will be a constant speed, I believe you can use a moving mesh or rotating reference frame approach, but I...
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Forum: Fluent UDF and Scheme Programming
February 6, 2011, 13:03
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Replies: 76
Views: 27,673
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Forum: Fluent UDF and Scheme Programming
February 1, 2011, 14:15
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Replies: 76
Views: 27,673
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Forum: Fluent UDF and Scheme Programming
February 1, 2011, 13:41
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Replies: 76
Views: 27,673
It certainly seems like it would be simplest if...
It certainly seems like it would be simplest if they just used a global coordinate system for the rotation, but it seems they have it defined based on the local body axes, which change orientation...
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Forum: Fluent UDF and Scheme Programming
February 1, 2011, 13:24
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Replies: 76
Views: 27,673
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Forum: Fluent UDF and Scheme Programming
August 3, 2010, 16:24
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Replies: 76
Views: 27,673
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Forum: Fluent UDF and Scheme Programming
August 3, 2010, 12:05
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Replies: 76
Views: 27,673
Ok, now really confused
I thought I had this right, but now I'm just more confused. I'm trying to just get motion about the x and y axes. I thought the Euler rate equations would help do this, but then I realized I'm...
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Forum: Fluent UDF and Scheme Programming
August 3, 2010, 09:36
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Replies: 76
Views: 27,673
Almostafa,
First off, it looks like you...
Almostafa,
First off, it looks like you could simplify your code down to just:
# include "udf.h"
# include "dynamesh_tools.h"
DEFINE_CG_MOTION(pump,dt,vel,omega,time,dtime)
{
real freq_t;...
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Forum: Fluent UDF and Scheme Programming
August 2, 2010, 16:14
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Replies: 76
Views: 27,673
For posterity, I figured out how to solve my...
For posterity, I figured out how to solve my problem. Use the Euler rate transformations in the UDF in order to convert between body and stationary velocities. You'll also need to use the current...
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Forum: Fluent UDF and Scheme Programming
July 30, 2010, 12:27
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Replies: 76
Views: 27,673
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Forum: Fluent UDF and Scheme Programming
July 30, 2010, 10:45
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Replies: 76
Views: 27,673
I haven't had any luck either. I tried doing a...
I haven't had any luck either. I tried doing a coordinate transformation to transform rotations about the reference x, y, and z axes to rotations about the moving body x, y, and z axes. It gets the...
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Forum: Fluent UDF and Scheme Programming
July 26, 2010, 16:43
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Replies: 76
Views: 27,673
CG Motion Absolute coordinates
I'm having a little trouble with the Define_CG_Motion macro. I'm trying to do a simulation of a wing that is both flapping and pitching. The flapping is a rotation about the x-axis and the pitching...
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