ICEM CFD-- ic engine combustion chamber meshing

November 12, 2007, 06:53

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.

November 12, 2007, 17:26

Hi,

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="http://hdl.handle.net/2100/248</A">http://hdl.handle.net/2100/248</A>.

Glenn Horrocks

November 12, 2007, 17:28

Oops, here is the correct URL: http://hdl.handle.net/2100/248

Glenn Horrocks

December 23, 2007, 08:44

Hi I want to see the modelling of an I C Engine

January 6, 2008, 18:27

Hi,

Have a look at my PhD thesis then: http://hdl.handle.net/2100/248

Glenn Horrocks

shuddle · April 21, 2012, 03:06

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

thank you

ghorrocks · April 21, 2012, 08:17

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, 01:27

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 mnmudhol@rediffmail.com

ghorrocks · April 23, 2012, 01:52

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

shuddle · April 23, 2012, 03:28

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, 09:13

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, 17:19

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

shuddle · April 24, 2012, 15:54

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, 08:46

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, 10:19

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.
Regards
Mohammed

ghorrocks · July 22, 2012, 19:34

Best ask on the fluent forum then.

November 12, 2007, 06:53	ICEM CFD-- ic engine combustion chamber meshing	#1
chetan mundhe Guest Posts: n/a	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.

November 12, 2007, 17:26	Re: ICEM CFD-- ic engine combustion chamber meshin	#2
Glenn Horrocks Guest Posts: n/a	Hi, 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="http://hdl.handle.net/2100/248</A">http://hdl.handle.net/2100/248</A>. Glenn Horrocks

November 12, 2007, 17:28	Re: ICEM CFD-- ic engine combustion chamber meshin	#3
Glenn Horrocks Guest Posts: n/a	Oops, here is the correct URL: http://hdl.handle.net/2100/248 Glenn Horrocks

December 23, 2007, 08:44	Re: ICEM CFD-- ic engine combustion chamber meshin	#4
Ajit Guest Posts: n/a	Hi I want to see the modelling of an I C Engine

January 6, 2008, 18:27	Re: ICEM CFD-- ic engine combustion chamber meshin	#5
Glenn Horrocks Guest Posts: n/a	Hi, Have a look at my PhD thesis then: http://hdl.handle.net/2100/248 Glenn Horrocks

April 21, 2012, 03:06		#6
shuddle New Member Manjunath Join Date: Mar 2012 Location: HUBLI Posts: 20 Rep Power: 14	hi chetan can you send me your engine model for referance to my work. thank you

April 21, 2012, 08:17		#7
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	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.

April 23, 2012, 01:27	tutorial	#8
shuddle New Member Manjunath Join Date: Mar 2012 Location: HUBLI Posts: 20 Rep Power: 14	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 mnmudhol@rediffmail.com

April 23, 2012, 01:52		#9
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Look in the ANSYS Workbench help/tutorials. It is there. (You will need an ANSYS community log in)

April 23, 2012, 03:28	tutorial	#10
shuddle New Member Manjunath Join Date: Mar 2012 Location: HUBLI Posts: 20 Rep Power: 14	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

April 23, 2012, 09:13		#11
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	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.

April 23, 2012, 17:19		#12
shuddle New Member Manjunath Join Date: Mar 2012 Location: HUBLI Posts: 20 Rep Power: 14	ya. you are right. thanks for your valuable suggestion. now i can access using my college license.

April 24, 2012, 15:54	ic engine template	#13
shuddle New Member Manjunath Join Date: Mar 2012 Location: HUBLI Posts: 20 Rep Power: 14	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

April 25, 2012, 08:46		#14
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	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.

July 22, 2012, 10:19		#15
Mohammed Al-Azawy New Member Join Date: Jun 2012 Posts: 13 Rep Power: 14	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. Regards Mohammed

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July 22, 2012, 19:34		#16
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Best ask on the fluent forum then.