|December 14, 2011, 10:15||
DEFINE_CG_MOTION for flapping wing UDF
Join Date: Dec 2011
Posts: 10Rep Power: 6
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!
|ansys fluent, define_cg_motion, flapping wing, udf|
|Thread||Thread Starter||Forum||Replies||Last Post|
|DEFINE_CG_MOTION for flapping wing UDF||xyzch001||Fluent UDF and Scheme Programming||19||May 14, 2016 14:34|
|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 09:13|