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Old   February 4, 2006, 11:38
Default courant no.
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Cfdworker
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What is courant number ?.what is the significance of courant number?Is it related to time step?

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Old   February 4, 2006, 14:13
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Hubert Janocha
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That's a very typical question for to find an answer in any book dealing with transient numerical schemes for CFD.
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Old   February 5, 2006, 09:22
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Piet
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this is a star-cd user forum. Ask your cfd-beginner questions in the main forum. OK cfdworker??

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Old   February 6, 2006, 06:52
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carno
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read the links, but you got to read books to get detail info on subject

http://www.cfd-online.com/Forum/cfx_....cgi/read/5455

http://www.cfd-online.com/Forum/cfx.cgi?read=13110

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Old   February 8, 2006, 11:15
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cfdworker
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Thanks carno.
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Old   February 12, 2006, 02:04
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Anand
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hi CFD worker

Convergence -Accelerating convergence -Under-relaxation - Increase under relaxation factors

under-relaxation factors slow down the rate at which the solution changes during the iteration and in transient solutions increase the Courant number:

Courant number is the ratio of a time step to a cell residence time

hope this may give some idea about Courant NUmber

all the best anand
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