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chetan mundhe November 12, 2007 06:53

ICEM CFD-- ic engine combustion chamber meshing
hi, its been a 3 months i'm trying to mesh the bowl in piston combustion chamber of ic engine.. the geometry consists of inlet valve, cylinder wall and offset piston bowl and.. its a moving and deforming mesh problem. the clearance volume between cylinder head and piston is 1.5 mm and it can also be increased till 5mm.i got the initial mesh but it is having very less quality ( 4 percent and orthogonality angle of 1.2 deg.) so, can u plz tell me if its possible to have good quality mesh for this geometry in ICEM CFD or is there any other approch to mesh it. i want the mesh to deform from top dead center to bottom dead center i.e. from clearnce volume of 1.5mm to 117.5 mm. i'll very grateful for your suggestion.. thank u be happy :) regards chetan M.

Glenn Horrocks November 12, 2007 17:26

Re: ICEM CFD-- ic engine combustion chamber meshin

It is always possible to improve mesh quality.

For the expanding part of the mesh make sure you only use extruded elements (hex and prisms) as tets and pyramids have terrible quality when stretched and squished.

You may wish to look at my PhD thesis on IC engine modelling: <A HREF="</A"></A>.

Glenn Horrocks

Glenn Horrocks November 12, 2007 17:28

Re: ICEM CFD-- ic engine combustion chamber meshin
Oops, here is the correct URL:

Glenn Horrocks

Ajit December 23, 2007 08:44

Re: ICEM CFD-- ic engine combustion chamber meshin
Hi I want to see the modelling of an I C Engine

Glenn Horrocks January 6, 2008 18:27

Re: ICEM CFD-- ic engine combustion chamber meshin

Have a look at my PhD thesis then:

Glenn Horrocks

shuddle April 21, 2012 02:06

hi chetan can you send me your engine model for referance to my work.

thank you

ghorrocks April 21, 2012 07:17

This thread is 5 years old so I doubt Chetan is around any more. But some silly people like me are still around :)

Have a look at my thesis (the link is above), or use the new IC engine template in Workbench V14. It uses Fluent as the CFD code but has much of the setup in a template so would be by far the easiest way to set things up.

shuddle April 23, 2012 00:27

hi ghorrocks, can you please provide me the fluent tutorials for ic engine, so that it might easy for me to do my work. my email is

ghorrocks April 23, 2012 00:52

Look in the ANSYS Workbench help/tutorials. It is there. (You will need an ANSYS community log in)

shuddle April 23, 2012 02:28

hi ghorrocks i am using cracked version of ansys so its not possible for me to register in the community so i request you to help me, if you are member of ansys community.

thank you

ghorrocks April 23, 2012 08:13

Well, you get what you pay for, don't you?

Honestly, why bother with cracked software? ANSYS has student versions available at little cost. And I think you can get access to the site from that. Alternately for students you can get access through your university's license.

shuddle April 23, 2012 16:19

ya. you are right. thanks for your valuable suggestion. now i can access using my college license.

shuddle April 24, 2012 14:54

ic engine template
hi horrocks,
again i am unable to get ic engine template in the ansys workbench tutorial. so can you please download it and send me. please its very urgent for me. waiting for your positive reply.

thanking you

ghorrocks April 25, 2012 07:46

Sorry, I do not down load stuff for people. Have a look on the community site under tutorials. It is there. Note it is a tutorial for ANSYS V14.

Mohammed Al-Azawy July 22, 2012 09:19

Hi ghorrocks,
Please can you tell me if I can use Fluent v.14 to move base of the cylinder for exmaple without UDF ( my geometry is Heart Pump and it is similar to the piston and I want to move the pusher plate) can use option(in-cylinder) if u can help me with some tutorial about that.

ghorrocks July 22, 2012 18:34

Best ask on the fluent forum then.

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