How can I define lateral axis as axis of rotation in Ansys UDF?

AamirSultan · September 24, 2018, 04:17

Hello Everyone ,
I am giving sinusoidal oscillatory motion to a 3D airfoil about longitudinal axis (lateral oscillations ) . How can I define "X-axis" as axis of rotation .
As you know that by default Z-axis is axis of rotation .
My Code is as follow ;

# include "udf.h"
DEFINE_ZONE_MOTION(sinusoidal,omega,axis,origin,ve locity,time,dtime)
{
real w = 2.0*M_PI*0.5; real wt = w*time; real axis[1]; real th, thd;
th = -0.017453*sin(wt); thd = -0.017453*w*cos(wt);
*omega = thd;
}

moh_zain · October 13, 2018, 08:01

Hi see http://users.ugent.be/~mvbelleg/fludf-12-0.pdf

and search for cg motion

September 24, 2018, 04:17	How can I define lateral axis as axis of rotation in Ansys UDF?	#1
AamirSultan New Member Aamir Sultan Join Date: May 2018 Posts: 12 Rep Power: 8	Hello Everyone , I am giving sinusoidal oscillatory motion to a 3D airfoil about longitudinal axis (lateral oscillations ) . How can I define "X-axis" as axis of rotation . As you know that by default Z-axis is axis of rotation . My Code is as follow ; # include "udf.h" DEFINE_ZONE_MOTION(sinusoidal,omega,axis,origin,ve locity,time,dtime) { real w = 2.0M_PI0.5; real wt = wtime; real axis[1]; real th, thd; th = -0.017453sin(wt); thd = -0.017453wcos(wt); *omega = thd; }

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October 13, 2018, 08:01		#2
moh_zain Member mohamed Join Date: Apr 2016 Posts: 34 Rep Power: 10	Hi see http://users.ugent.be/~mvbelleg/fludf-12-0.pdf and search for cg motion