|
[Sponsors] |
December 14, 2011, 10:15 |
DEFINE_CG_MOTION for flapping wing UDF
|
#1 |
New Member
xyzch001
Join Date: Dec 2011
Posts: 10
Rep Power: 14 |
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 "DEFINE_CG_MOTION" I need to specify an angular velocity d(theta)/dt so that the oscillation angle of the flapping wing is: theta(t)=25*sin(2*pi*frequency*t+arcsin(3/5))-15 If I use the derivate d(theta)/dt=50*frequency*pi*cos(2*pi*frequency*t+arcsin(3/5)) I lose the constant "-15" so that the oscillation angle is no more from +10 deg to -40 deg. As a matter of fact the positive peak amplitude must be +10 deg and the negative one must be -40 deg. How can I solve the problem? Thank you so much! |
|
Tags |
ansys fluent, define_cg_motion, flapping wing, udf |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
DEFINE_CG_MOTION for flapping wing UDF | xyzch001 | Fluent UDF and Scheme Programming | 21 | February 7, 2022 08:47 |
DEFINE_CG_MOTION for flapping wing UDF | xyzch001 | Fluent UDF and Scheme Programming | 0 | December 14, 2011 09:39 |
flapping wing udf a serious doubt | doctsh | Fluent UDF and Scheme Programming | 0 | February 17, 2011 13:05 |
UDF for sweeping wing | aamer | Main CFD Forum | 0 | December 16, 2010 08:35 |
udf for 3d wing | giorgio | FLUENT | 0 | October 8, 2004 10:13 |