Kato-Launder equation

sri31049 · May 1, 2009, 09:47

hai

I am trying to apply the Kato-Launder k-epsilon turbulence model for my problem. So, i have to modify the production term in the standard k-epsilon model. Is it possible with UDF's? Is it possibule to impliment Kato-Launder model using UDF's? please help me in this try.

thanks in advance for ur suggestions.

pete · May 2, 2009, 05:06

Kato-Launder is already implemented in Fluent. You can turn it on using the text-interface commands (not the gui)

sri31049 · May 2, 2009, 06:51

dear pete

thankyou so much for your kind reply. i am very happy with your answer.

can you please tell me how can i found the text commands and how to activate this kato-landur equation?
is it availabule in FLUENT 6.2 also?

thanks in advance for your suggestions.

sri31049 · May 3, 2009, 01:59

hai peter

thanks for your advice. i enabled the Kato-Launder model with text interface comands. But i dont know where i can see it is really enabled or not?. and in summery it is showing stadard k - epsilon model but it is not showing kato - launder model is enabled or not?

please help me in this problem. i a really tnankful for ur suggestions

sri

pete · May 3, 2009, 06:12

Fluent support should be able to help you with the details. To see from the solution if Kato-Launder is active I would advice you to look at the turbulence levels in stagnation regions and in the free-stream. The k-levels in stagnation regions and regions oustside boundary and shear layers should be much lower when you have Kato-Launder active.

sri31049 · May 3, 2009, 07:24

hai peter

thanq so munch for ur suggestions. i will follow ur advice.
thank you so much

best regards

sri

May 1, 2009, 09:47	Kato-Launder equation	#1
sri31049 New Member paaresh Join Date: Mar 2009 Posts: 19 Rep Power: 17	hai I am trying to apply the Kato-Launder k-epsilon turbulence model for my problem. So, i have to modify the production term in the standard k-epsilon model. Is it possible with UDF's? Is it possibule to impliment Kato-Launder model using UDF's? please help me in this try. thanks in advance for ur suggestions.

May 2, 2009, 06:51	Kato-Launder equation	#3
sri31049 New Member paaresh Join Date: Mar 2009 Posts: 19 Rep Power: 17	dear pete thankyou so much for your kind reply. i am very happy with your answer. can you please tell me how can i found the text commands and how to activate this kato-landur equation? is it availabule in FLUENT 6.2 also? thanks in advance for your suggestions.

May 3, 2009, 01:59	Kato-Launder equation	#4
sri31049 New Member paaresh Join Date: Mar 2009 Posts: 19 Rep Power: 17	hai peter thanks for your advice. i enabled the Kato-Launder model with text interface comands. But i dont know where i can see it is really enabled or not?. and in summery it is showing stadard k - epsilon model but it is not showing kato - launder model is enabled or not? please help me in this problem. i a really tnankful for ur suggestions sri

May 3, 2009, 07:24	Kato-Launder equation	#6
sri31049 New Member paaresh Join Date: Mar 2009 Posts: 19 Rep Power: 17	hai peter thanq so munch for ur suggestions. i will follow ur advice. thank you so much best regards sri

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May 2, 2009, 05:06		#2
pete Administrator Peter Jones Join Date: Jan 2009 Posts: 682 Rep Power: 10	Kato-Launder is already implemented in Fluent. You can turn it on using the text-interface commands (not the gui)

May 3, 2009, 06:12		#5
pete Administrator Peter Jones Join Date: Jan 2009 Posts: 682 Rep Power: 10	Fluent support should be able to help you with the details. To see from the solution if Kato-Launder is active I would advice you to look at the turbulence levels in stagnation regions and in the free-stream. The k-levels in stagnation regions and regions oustside boundary and shear layers should be much lower when you have Kato-Launder active.