How choose my boundary conditions

liloM · July 30, 2015, 16:01

http://www.cfd-online.com/Forums/ope...d-cooling.html

in this thread i have my answers about the problem witch is : cooling a mother Board contain tow cpus (hot part ) and one source of could air (fan) in one side , so i will use chtMultiRegionSimpleFoam as a solver and Salome as a geometry design tool , i complete with my geometry but it last the meshing and the problem is HOW CHOOSE BOUNDARY CONDITIONS ( inlet , outlet , wall , fixed or moved Wall ?????????) pleas help me !!!

liloM · August 1, 2015, 11:31

Quote:

Originally Posted by liloM

http://www.cfd-online.com/Forums/ope...d-cooling.html

in this thread i have my answers about the problem witch is : cooling a mother Board contain tow cpus (hot part ) and one source of could air (fan) in one side , so i will use chtMultiRegionSimpleFoam as a solver and Salome as a geometry design tool , i complete with my geometry but it last the meshing and the problem is HOW CHOOSE BOUNDARY CONDITIONS ( inlet , outlet , wall , fixed or moved Wall ?????????) pleas help me !!!

pleas any one can help me !!!!

seanmike31 · August 5, 2015, 19:28

Hi liloM,
I'm a new user of OpenFOAM but as an advice you should first define what kind of heat transfers you want to model, how and where. To simulate a cooling of a motherboard, I guess you should also model an external flow around it.

hxaxtma · August 6, 2015, 03:41

Give more information about your case, upload a picture of your domain, then we can help you

liloM · August 6, 2015, 04:41

Thank you seanmike31 and hxaxtma ,
ok for more detail this is a capture from my Salome geometry project

hxaxtma · August 6, 2015, 05:23

In general it is good to start with the tutorials, there you will learn all the basics

Quote:

cd $FOAM_TUTORIALS

For the inlet with swirl I would suggest using groovyBC:
https://openfoamwiki.net/index.php/Contrib/groovyBC

liloM · August 6, 2015, 05:53

no i will use a cool air with axial velocity , Thank you but for the cpu in T file should i fix the value ? because when the cool air pass throw it , we need to see that the temperature changes with time .!!!

July 30, 2015, 16:01	How choose my boundary conditions	#1
liloM New Member OSM Join Date: Jul 2015 Posts: 11 Rep Power: 10	http://www.cfd-online.com/Forums/ope...d-cooling.html in this thread i have my answers about the problem witch is : cooling a mother Board contain tow cpus (hot part ) and one source of could air (fan) in one side , so i will use chtMultiRegionSimpleFoam as a solver and Salome as a geometry design tool , i complete with my geometry but it last the meshing and the problem is HOW CHOOSE BOUNDARY CONDITIONS ( inlet , outlet , wall , fixed or moved Wall ?????????) pleas help me !!!

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August 5, 2015, 19:28		#3
seanmike31 New Member Join Date: Mar 2015 Posts: 10 Rep Power: 11	Hi liloM, I'm a new user of OpenFOAM but as an advice you should first define what kind of heat transfers you want to model, how and where. To simulate a cooling of a motherboard, I guess you should also model an external flow around it.

August 6, 2015, 03:41		#4
hxaxtma Senior Member Join Date: Jan 2014 Posts: 179 Rep Power: 12	Give more information about your case, upload a picture of your domain, then we can help you

August 6, 2015, 04:41		#5
liloM New Member OSM Join Date: Jul 2015 Posts: 11 Rep Power: 10	Thank you seanmike31 and hxaxtma , ok for more detail this is a capture from my Salome geometry project

August 6, 2015, 05:53		#7
liloM New Member OSM Join Date: Jul 2015 Posts: 11 Rep Power: 10	no i will use a cool air with axial velocity , Thank you but for the cpu in T file should i fix the value ? because when the cool air pass throw it , we need to see that the temperature changes with time .!!!