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Forum: OpenFOAM Running, Solving & CFD

February 3, 2010, 21:54

Replies: 218

LES

Views: 58,752

Posted By lakeat

Okay, here's my experience, you may disagree. ...

Okay, here's my experience, you may disagree.

I used to use a bad mesh with some traditional SGS model plus some traditional wall treatment, yet the results are very bad. (It become worse as the...

Forum: OpenFOAM Running, Solving & CFD

February 3, 2010, 11:15

Replies: 218

LES

Views: 58,752

Posted By lakeat

First of all, I do not think LES is an almighty...

First of all, I do not think LES is an almighty machine, the one who uses LES must have a good understanding of the idea before he can get good results.

As the Re increases, and as the wall...

Forum: OpenFOAM Running, Solving & CFD

February 3, 2010, 02:58

Replies: 218

LES

Views: 58,752

Posted By lakeat

What's your Re? And could you give us a picture...

What's your Re? And could you give us a picture of your mesh?

Forum: OpenFOAM Running, Solving & CFD

August 20, 2009, 08:37

Replies: 218

LES

Views: 58,752

Posted By lakeat

No, you need to do it yourself. :)

No, you need to do it yourself. :)

Forum: OpenFOAM Running, Solving & CFD

April 13, 2009, 03:27

Replies: 218

LES

Views: 58,752

Posted By lakeat

Hi foamers, I don't want to start a new...

Hi foamers,

I don't want to start a new thread, so I post it here, I am using DES.
My simulation blows again, could anyone give me some hints, thanks.

Second, I feel puzzled about what is...

Forum: OpenFOAM Running, Solving & CFD

April 7, 2009, 01:54

Replies: 218

LES

Views: 58,752

Posted By lakeat

are these BC settings okay?

I am using oodles with S-A model to do a flat-plate in a wind tunnel simulation, and the simulation blows many times, so i guess my boundary setting is wrong. Here is the picture of how I set them....

Forum: OpenFOAM Running, Solving & CFD

April 6, 2009, 07:44

Replies: 218

LES

Views: 58,752

Posted By lakeat

Sorry for disturbance, I've got the solution now....

Sorry for disturbance, I've got the solution now. Lambda2 utility.

Forum: OpenFOAM Running, Solving & CFD

April 6, 2009, 05:47

Replies: 218

LES

Views: 58,752

Posted By lakeat

Dear Eugene, and Dear All, Concerning the...

Dear Eugene, and Dear All,

Concerning the second eigenvalue, I want to start a new thread, but I I'm not sure whether the problem is big enough to deserve that, so I ask you here.

I saw in your...

Forum: OpenFOAM Running, Solving & CFD

October 26, 2008, 05:36

Replies: 218

LES

Views: 58,752

Posted By lakeat

Hi Seang! Thanks for your i

Hi Seang!

Thanks for your info. I have downloaded them.
I am reading some papers about DES. I feel Spalart's writing style is hard to grasp.

To my knowledge now, I found meshing in DES...

Forum: OpenFOAM Running, Solving & CFD

October 21, 2008, 15:08

Replies: 218

LES

Views: 58,752

Posted By lakeat

Dear all, Several questions

Dear all,

Several questions again. http://www.cfd-online.com/OpenFOAM_Discus/clipart/happy.gif

After reading Eugene's thesis, I feel deeply impressed by DES. My major is bridge engg., and...

Forum: OpenFOAM Running, Solving & CFD

September 5, 2008, 22:36

Replies: 218

LES

Views: 58,752

Posted By lakeat

Dear foamers, I have difficul

Dear foamers,
I have difficulties in initialize the field?
My ultimate question is how to set k and nuSgs field?
What principles shall I respect and observe?

For my test case is flow past...

Forum: OpenFOAM Running, Solving & CFD

September 4, 2008, 03:37

Replies: 218

LES

Views: 58,752

Posted By lakeat

Hello Cedric, Thanks for shari

Hello Cedric, Thanks for sharing and help!
Much appreciated.

Daniel

Forum: OpenFOAM Running, Solving & CFD

September 4, 2008, 03:30

Replies: 218

LES

Views: 58,752

Posted By lakeat

Thank you, 吴老师, your inf

Thank you, 吴老师, your information is very helpful!

Regards, Daniel

Forum: OpenFOAM Running, Solving & CFD

September 3, 2008, 23:49

Replies: 218

LES

Views: 58,752

Posted By lakeat

Dear developers: On the dev

Dear developers:

On the development of LES in OpenFOAM, what are your main concerns now? New LES models or wall treatment, or whatelse?

What is the strength and weakness of LES in OF...

Forum: OpenFOAM Running, Solving & CFD

September 3, 2008, 23:38

Replies: 218

LES

Views: 58,752

Posted By lakeat

Another question concerning ne

Another question concerning new models of LES,

The 1st one is You, D. and Moin, P. (2007), "A dynamic global-coefficient subgrid-scale eddy-viscosity model for large-eddy simulation in complex...

Forum: OpenFOAM Running, Solving & CFD

September 3, 2008, 23:31

Replies: 218

LES

Views: 58,752

Posted By lakeat

A nice day to you all! Could

A nice day to you all!
Could someone write a manual of LES? I am having a hard time with LESProperties now. That would be very nice for the new Foamer.

I have question concerning wall Function...

Forum: OpenFOAM Running, Solving & CFD

July 28, 2008, 10:08

Replies: 218

LES

Views: 58,752

Posted By lakeat

> Could anyone please help me

> Could anyone please help me out in running it successfully. And please also suggest what all parameters that I have to be ready with before running the simulation.

rhoTurbFoam for LES?
hi...

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