the combustion model problem

hanshandiaoke · November 25, 2011, 20:35

Hi,
I want to simulate a diesel sector with the EBU-LATCT+Shell Ignition model. Then I get the sector in prostar from es-ice and change the combustion model. But when I compute the simulation, the combustion model is still the CFM model which is the default choice in es-ice. I think the 'save_ice_after_map' file may contain the CFM information.
So how can I replace CFM model with the EBU-LATCT+Shell Ignition model successfully?
Thank you.

skylent · November 26, 2011, 00:40

Maybe you can give up to using the starcontrols after starsetup.

hanshandiaoke · November 26, 2011, 02:43

Hi skylent
I have got your opinion. But the file 'save_ice_after_map' is needed to perform the simulation, which comes from the star controls? How do I deal with this problem?
thank you.

skylent · November 26, 2011, 03:52

when you operate the"star setup" process, remember to deselect the "use star controls" option, and then you can set the initial condition, boundary condition,combustion model,time step... in prostar.

I also met the same kind of problem,I select ECFM-3Z SI model in "star controls", and the fuel I selected is methane(CH4). However, in prostar, when I check the combustion model, the default fuel identifier for laminar flame speed is isooctane, and after I change it to methane and save the model, the fuel identifier become isooctane again when I reopen the model. It troubles me so much.

hanshandiaoke · November 27, 2011, 02:08

Hi skylent
I follow your steps, deselect the "star controls" option in the "star setup" panel. But the mistake appeears," The file "save_ice" does not contain the image of an Ice save file.//Error reading from the save file.//Failed.". I think it's about the file Ice. But after I copy this file to my dictionary, the mistake does not change. I'm very confused, expect to get your reply.
Thank you.

skylent · November 29, 2011, 07:01

I'm sorry for that, but when I use Map method and trim method, it didnot have these problem.

hanshandiaoke · November 29, 2011, 07:04

Hi skylent
Thank you all the same. I think I must get another way to solve this problem.
Best regards.

skylent · December 2, 2011, 03:47

Change the Extrusion ratio to -1(not extrude for boundary layer)，and remake the mesh.

Because I found these sentence in es-ice userguide:"This new surface will have a one-to-one correspondence with the old boundary surface and its vertices will not be positioned at the correct location. During Star setup with the selected Use Star controls option, the extruded faces will be moved to the correct location."

November 25, 2011, 20:35	the combustion model problem	#1
hanshandiaoke New Member Li Shiwei Join Date: Jul 2010 Posts: 5 Rep Power: 15	Hi, I want to simulate a diesel sector with the EBU-LATCT+Shell Ignition model. Then I get the sector in prostar from es-ice and change the combustion model. But when I compute the simulation, the combustion model is still the CFM model which is the default choice in es-ice. I think the 'save_ice_after_map' file may contain the CFM information. So how can I replace CFM model with the EBU-LATCT+Shell Ignition model successfully? Thank you.

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November 26, 2011, 00:40		#2
skylent Member zheng jianjun Join Date: Jan 2010 Posts: 46 Rep Power: 16	Maybe you can give up to using the starcontrols after starsetup.

November 26, 2011, 02:43		#3
hanshandiaoke New Member Li Shiwei Join Date: Jul 2010 Posts: 5 Rep Power: 15	Hi skylent I have got your opinion. But the file 'save_ice_after_map' is needed to perform the simulation, which comes from the star controls? How do I deal with this problem? thank you.

November 26, 2011, 03:52		#4
skylent Member zheng jianjun Join Date: Jan 2010 Posts: 46 Rep Power: 16	when you operate the"star setup" process, remember to deselect the "use star controls" option, and then you can set the initial condition, boundary condition,combustion model,time step... in prostar. I also met the same kind of problem,I select ECFM-3Z SI model in "star controls", and the fuel I selected is methane(CH4). However, in prostar, when I check the combustion model, the default fuel identifier for laminar flame speed is isooctane, and after I change it to methane and save the model, the fuel identifier become isooctane again when I reopen the model. It troubles me so much.

November 27, 2011, 02:08		#5
hanshandiaoke New Member Li Shiwei Join Date: Jul 2010 Posts: 5 Rep Power: 15	Hi skylent I follow your steps, deselect the "star controls" option in the "star setup" panel. But the mistake appeears," The file "save_ice" does not contain the image of an Ice save file.//Error reading from the save file.//Failed.". I think it's about the file Ice. But after I copy this file to my dictionary, the mistake does not change. I'm very confused, expect to get your reply. Thank you.

November 29, 2011, 07:01		#6
skylent Member zheng jianjun Join Date: Jan 2010 Posts: 46 Rep Power: 16	I'm sorry for that, but when I use Map method and trim method, it didnot have these problem.

November 29, 2011, 07:04		#7
hanshandiaoke New Member Li Shiwei Join Date: Jul 2010 Posts: 5 Rep Power: 15	Hi skylent Thank you all the same. I think I must get another way to solve this problem. Best regards.

December 2, 2011, 03:47		#8
skylent Member zheng jianjun Join Date: Jan 2010 Posts: 46 Rep Power: 16	Change the Extrusion ratio to -1(not extrude for boundary layer)，and remake the mesh. Because I found these sentence in es-ice userguide:"This new surface will have a one-to-one correspondence with the old boundary surface and its vertices will not be positioned at the correct location. During Star setup with the selected Use Star controls option, the extruded faces will be moved to the correct location."