[s&m]

Hi to everyone!
I'm working on a easy simulation, a flow around a cylinder, using oneEqEddy of LES(from tutorial i change the mesh and BC). Now i want to use the Smagorinsky model, which parameter do i have to change inside "costant" directory (other than "LESModel Smagorinsky") ?
thx

[alberto]

Originally Posted by s&m

Hi to everyone!
I'm working on a easy simulation, a flow around a cylinder, using oneEqEddy of LES(from tutorial i change the mesh and BC). Now i want to use the Smagorinsky model, which parameter do i have to change inside "costant" directory (other than "LESModel Smagorinsky") ?
thx

Hi,

the model parameters ce and ck are defined optionally, if you do not want to use the default values, by inserting a dictionary like

SmagorinskyCoeff
{
ce <put value here>
ck <put value here>
}

The definition of these coefficients in OF is reported here:

http://foam.sourceforge.net/doc/Doxy...agorinsky.html

Additionally, you can use the Van Driest damping functions by setting

delta vanDriest;

Best,

[s&m]

thx alberto

Are u italian right?
posso aggiungerti su msn x farti eventualmente altre domande?

bye!

[alberto]

Originally Posted by s&m

thx alberto

Are u italian right?
posso aggiungerti su msn x farti eventualmente altre domande?

bye!

Yes, I'm Italian. And yes, you can add me to your MSN, but if the questions are of general insterest it would be better to have them here so that others can read/help/benefit too.

Best,

[s&m]

Originally Posted by alberto

Yes, I'm Italian. And yes, you can add me to your MSN, but if the questions are of general insterest it would be better to have them here so that others can read/help/benefit too.

Best,

ok another questions, in the postprocessing, i have many values, and among them there are k_0 or U_0 i don't understand their meaning.. they are the sgs values like Nusgs?
thanks (p.s. i add you to my Msn )

[wchao.csu]

Hi Alberto,

I also want have a good understanding of the definition of these parameters ce and ck. But I cant open the link attached. Is there any way else to see it? Thank you in advance.

Originally Posted by alberto

Hi,

the model parameters ce and ck are defined optionally, if you do not want to use the default values, by inserting a dictionary like

SmagorinskyCoeff
{
ce <put value here>
ck <put value here>
}

The definition of these coefficients in OF is reported here:

http://foam.sourceforge.net/doc/Doxy...agorinsky.html

Additionally, you can use the Van Driest damping functions by setting

delta vanDriest;

Best,

[wenxu]

Originally Posted by s&m

ok another questions, in the postprocessing, i have many values, and among them there are k_0 or U_0 i don't understand their meaning.. they are the sgs values like Nusgs?
thanks (p.s. i add you to my Msn )

previous time step value.
wen