[help Beginner]calculation error

pirami · May 2, 2011, 01:58

the followings are the error messages I got

global courant number is greater than 250.00
the velocity field is probably diverging.
Please check the solution and reduce the time-step if necessary.

i'm trying to solve two-phase flow inside a cylinderical tank which has
water jet inlet.

i've tried several models but i got the same message.
FLUENT cannot calculate even one iteration.

help me.

xaero · May 3, 2011, 10:56

Hello,

you need to provide more details of your case,
steady/transient? vof? explicit? what time step?

greetings

ximik · May 4, 2011, 17:41

I know this is obvious, but did you try reducing the time step? it will converge slower but it should be more stable.

May 2, 2011, 01:58	[help Beginner]calculation error	#1
pirami New Member Jang Mingi Join Date: May 2011 Posts: 3 Rep Power: 15	the followings are the error messages I got global courant number is greater than 250.00 the velocity field is probably diverging. Please check the solution and reduce the time-step if necessary. i'm trying to solve two-phase flow inside a cylinderical tank which has water jet inlet. i've tried several models but i got the same message. FLUENT cannot calculate even one iteration. help me.

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May 3, 2011, 10:56		#2
xaero New Member Join Date: Oct 2009 Posts: 11 Rep Power: 17	Hello, you need to provide more details of your case, steady/transient? vof? explicit? what time step? greetings

May 4, 2011, 17:41		#3
ximik New Member Join Date: May 2011 Posts: 18 Rep Power: 15	I know this is obvious, but did you try reducing the time step? it will converge slower but it should be more stable.