finding difficulty in dynamic meshing for ic engin

December 8, 2006, 02:59

i am simulating ic engine combustion in 3d in fluent i am finding difficulty for moving mesh conditions. please help. tell me some case file swith amoving piston and a deforming mesh

strider12 · October 18, 2012, 09:50

I too am trying to simulate a 3d modelling of an Si engine. I did not find any tutorials for 3d models. If someone has any tutorials or knew how to do it please reply.

Marion · October 18, 2012, 10:02

Hi,

I think the best is to ask your Fluent support team, but a 3D model is not much different from a 2D model in that case, as the displacement is only in 1 direction. It can be more difficult if you are modelling the valves as well.

By the way - what do you want to know? how to set up the MDM strategy, or how to use the "in cylinder option" in Fluent?

Regards,
Marion.

strider12 · October 19, 2012, 15:20

Thanks for the reply . I had made a model and meshed it using automatic meshing. I am not modelling the valve motion. But when I tried to give a dynamic mesh , it failed saying negative volume . I had given the options for remishing minimum and maximum size as 0.4 and 1.4 times the average length.I had given real values for the in cylinder option.The amplitude of the motion was too large .
Also when i tried to visualize the zone motion i was only able to view the piston,not meshes or side walls or cylinder head.
Actually i had given the parameters based on a tutorial on 2d dynamic mesh .Is there any significant change for 3d modelling . Thanking you in advance for your reply
.

December 8, 2006, 02:59	finding difficulty in dynamic meshing for ic engin	#1
inderpreet saini Guest Posts: n/a	i am simulating ic engine combustion in 3d in fluent i am finding difficulty for moving mesh conditions. please help. tell me some case file swith amoving piston and a deforming mesh

October 19, 2012, 15:20		#4
strider12 New Member JOBIN Join Date: Oct 2012 Posts: 3 Rep Power: 14	Thanks for the reply . I had made a model and meshed it using automatic meshing. I am not modelling the valve motion. But when I tried to give a dynamic mesh , it failed saying negative volume . I had given the options for remishing minimum and maximum size as 0.4 and 1.4 times the average length.I had given real values for the in cylinder option.The amplitude of the motion was too large . Also when i tried to visualize the zone motion i was only able to view the piston,not meshes or side walls or cylinder head. Actually i had given the parameters based on a tutorial on 2d dynamic mesh .Is there any significant change for 3d modelling . Thanking you in advance for your reply . Last edited by strider12; October 19, 2012 at 16:16.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Dynamic meshing	Manoj Kumar	FLUENT	3	June 27, 2010 20:26
Dynamic Meshing with Flow 3D	M_Agni	FLOW-3D	1	June 13, 2010 19:20
[GAMBIT] Dynamic Meshing of a combustion chamber	donarundas	ANSYS Meshing & Geometry	1	December 2, 2009 08:13
Issues with dynamic meshing	sridhu88	FLUENT	1	June 11, 2009 17:46
help for dynamic meshing for incylinder combustion	Ramesh K	FLUENT	0	June 19, 2006 07:29

October 18, 2012, 09:50		#2
strider12 New Member JOBIN Join Date: Oct 2012 Posts: 3 Rep Power: 14	I too am trying to simulate a 3d modelling of an Si engine. I did not find any tutorials for 3d models. If someone has any tutorials or knew how to do it please reply.

October 18, 2012, 10:02		#3
Marion Senior Member Marion Join Date: Jul 2012 Location: France Posts: 122 Rep Power: 15	Hi, I think the best is to ask your Fluent support team, but a 3D model is not much different from a 2D model in that case, as the displacement is only in 1 direction. It can be more difficult if you are modelling the valves as well. By the way - what do you want to know? how to set up the MDM strategy, or how to use the "in cylinder option" in Fluent? Regards, Marion.