problem in sealing inter chamber leakage in wankel simulation

pravin.iitk · March 22, 2011, 12:22

Hi all,

I need little help in sealing inter chamber leakage in wankel simulation. I am trying to impose momentum source (sink) near rotor tips. I wrote udf code but it doesn't seems to work at all. If anybody can help please.

Thanks in advance

Catthan · August 18, 2011, 11:31

Hi pravin.iitk,

I'm very sorry to divert your thread as I don't have an answer to your problem and I really hope you have solved it by now.

I am seeking for advice on setting up a dynamic simulation of the gas circuit in a Wankel engine; no combustion, just the rotor motion and the mesh deformation.

I have a UDF for moving the rotor CG on a circular path, the radius equal to e, which seems it works but I'm getting negative volume errors and I can't sort out how to define the dynamic mesh zones. The only thing I'm sure about is setting the rotor as a rigid body.
The mesh is hexahedral and consists of the rotor and housing surfaces and a top and a bottom surface to enclose the volume mesh.

I would be very grateful if you could help me.

All the best,

March 22, 2011, 12:22	problem in sealing inter chamber leakage in wankel simulation	#1
pravin.iitk New Member Pravin Gangwar Join Date: Mar 2010 Location: Madrid, Spain Posts: 7 Rep Power: 16	Hi all, I need little help in sealing inter chamber leakage in wankel simulation. I am trying to impose momentum source (sink) near rotor tips. I wrote udf code but it doesn't seems to work at all. If anybody can help please. Thanks in advance Last edited by pravin.iitk; April 7, 2011 at 11:02.

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August 18, 2011, 11:31		#2
Catthan Member Join Date: May 2010 Posts: 57 Rep Power: 16	Hi pravin.iitk, I'm very sorry to divert your thread as I don't have an answer to your problem and I really hope you have solved it by now. I am seeking for advice on setting up a dynamic simulation of the gas circuit in a Wankel engine; no combustion, just the rotor motion and the mesh deformation. I have a UDF for moving the rotor CG on a circular path, the radius equal to e, which seems it works but I'm getting negative volume errors and I can't sort out how to define the dynamic mesh zones. The only thing I'm sure about is setting the rotor as a rigid body. The mesh is hexahedral and consists of the rotor and housing surfaces and a top and a bottom surface to enclose the volume mesh. I would be very grateful if you could help me. All the best,