UDF for y displacement -- CFD Online Discussion Forums

December 27, 2018, 13:38	UDF for y displacement	#1
Mohawk Member Mustafa Join Date: May 2013 Posts: 54 Rep Power: 13	Need help I am working on a Stirling engine , To describe the motion of piston , I have written a UDF for the y displacement or position . Is it correct * moving piston-CG movement of piston/ #include "udf.h" DEFINE_CG_motion(piston,dt,y,time,dtime) { real x y = 0.06869+0.06496 (sin(3.14*(x-0.22597)/0.54806)); } regards,

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