UDF for moving mesh

March 23, 2005, 08:39

Hi there,

I am working with the bluff body in free flow. Now, i want to model the free vibration of bluff body due to the vortex formation. For that purpose, i want to define a UDF which would calculate only verticle diplacement from the lift force calculated in previous step. Do any body know some usefull udf example for such a case. Thanks in advance. sawa

March 23, 2005, 09:47

Hi Sawa, You can use the UDF "valve.c" in the tutorial "Using Dynamic Mesh" in the online help. It calculates for each time step, the pressure force on a piston and compares it with a spring force. This difference is twice integrated for getting the piston's displacement. You can adjust for your calculation... it should work! mAx

March 23, 2005, 08:39	UDF for moving mesh	#1
sawa Guest Posts: n/a	Hi there, I am working with the bluff body in free flow. Now, i want to model the free vibration of bluff body due to the vortex formation. For that purpose, i want to define a UDF which would calculate only verticle diplacement from the lift force calculated in previous step. Do any body know some usefull udf example for such a case. Thanks in advance. sawa

March 23, 2005, 09:47	Re: UDF for moving mesh	#2
mAx Guest Posts: n/a	Hi Sawa, You can use the UDF "valve.c" in the tutorial "Using Dynamic Mesh" in the online help. It calculates for each time step, the pressure force on a piston and compares it with a spring force. This difference is twice integrated for getting the piston's displacement. You can adjust for your calculation... it should work! mAx

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