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Search took 0.00 seconds. Search: Posts Made By: xyzch001
Forum: Fluent UDF and Scheme Programming January 12, 2012, 05:48
Replies: 21
Views: 8,544
Posted By xyzch001
Hi, I don't know STAR CCM+, but I think you can...

Hi, I don't know STAR CCM+, but I think you can do it.
Forum: Fluent UDF and Scheme Programming December 18, 2011, 14:45
Replies: 21
Views: 8,544
Posted By xyzch001
Hi pdp.aero! Finally I found the solution:...

Hi pdp.aero!
Finally I found the solution: this is the function that gives me the desired flapping angles: theta[t] = 0.8409*sin(w*t - 0.2563) + 0.6643*cos(w*t + 0.7741) - ...
Forum: Fluent UDF and Scheme Programming December 16, 2011, 04:57
Replies: 21
Views: 8,544
Posted By xyzch001
Yes it works! you're great man! but my flap is...

Yes it works! you're great man! but my flap is theta=0 for t=0 how can I solve the problem? How can I use the "grid motion"? thanks a lot!!
Forum: Fluent UDF and Scheme Programming December 15, 2011, 13:14
Replies: 21
Views: 8,544
Posted By xyzch001
Hi! If I use your function I get +33.13 deg for...

Hi! If I use your function I get +33.13 deg for t=0 and -33.13 deg for t=0.33. What am I doing wrong? Anyway the frequency f of the flapping is 6. Thank you
Forum: Fluent UDF and Scheme Programming December 15, 2011, 09:28
Replies: 21
Views: 8,544
Posted By xyzch001
The problem is that when you derive theta to find...

The problem is that when you derive theta to find the angular velocity you lose the constant, so when Fluent integrates the velocity (DEFINE_CG_MOTION requires the angular velocity, not the...
Forum: Fluent UDF and Scheme Programming December 15, 2011, 08:38
Replies: 21
Views: 8,544
Posted By xyzch001
Hi pdp.aero! Thank you for your answer! Yes I...

Hi pdp.aero! Thank you for your answer! Yes I already know that the argument must be in radian...I wrote the previous formula in degrees for convenience. That is not a problem...The problem is to...
Forum: Fluent UDF and Scheme Programming December 14, 2011, 08:51
Replies: 21
Views: 8,544
Posted By xyzch001
Exclamation DEFINE_CG_MOTION for flapping wing UDF

Hi everybody!
I'm a graduate student of mechanical engineering working at a Fluent project for my thesys. I have to write a UDF in order to give a motion law to a flapping wing. By using the UDF...
Showing results 1 to 7 of 7

 
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