convection terms

mytruth7 · June 20, 2013, 22:07

Hello ~!
I am modeling a high speed electric motor with a internal two blades.
This model includes turbulence model for blades.
My problem is decreasing calculation time.
I am using Realizable k-e model, and segregated flow.
I don't want to change mesh cell number(#18,000,000)
To decrease calculation time, I thought Changing convection term, 1st order at initial to 2nd order at final. But I wondering this will be reasonable for solution accuracy and It is okay for my problems....
, Are there any Idea? please help me...........

siara817 · June 26, 2013, 09:30

I think there is no problem if you run with 1st order and then change it to second order.

June 26, 2013, 09:30		#2
siara817 Senior Member siamak rahimi ardkapan Join Date: Jul 2010 Location: Copenhagen, Denmark Posts: 220 Rep Power: 17	I think there is no problem if you run with 1st order and then change it to second order. __________________ Good luck Siamak

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June 20, 2013, 22:07	convection terms	#1
mytruth7 New Member giljae song Join Date: Jan 2013 Posts: 5 Rep Power: 13	Hello ~! I am modeling a high speed electric motor with a internal two blades. This model includes turbulence model for blades. My problem is decreasing calculation time. I am using Realizable k-e model, and segregated flow. I don't want to change mesh cell number(#18,000,000) To decrease calculation time, I thought Changing convection term, 1st order at initial to 2nd order at final. But I wondering this will be reasonable for solution accuracy and It is okay for my problems.... , Are there any Idea? please help me...........