How to set angular velocity?

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How to set angular velocity?

Postby Nico » 10 Aug 2017, 16:06

Hi.
I am working with a turbulence flow across a rotating cylinder and i am new with elmer. I do not realize how to set angular velocity. I was wondering if someone could help me. :D :D
Thanks.

(Sorry if the post is not in the correct section).
Nico
 
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Re: How to set angular velocity?

Postby mzenker » 10 Aug 2017, 16:52

Hi,

there is a keyword for that, see Models Manual, chapter 2.
If you use ElmerGUI, you can use the free text field in the Body Force window.

HTH,

Matthias
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Re: How to set angular velocity?

Postby raback » 11 Aug 2017, 10:52

Hi

Note that turbulence + rotating frames is probably unknown territory. There indeed exists a rotating frame for Navier-Stokes but that has not been extensively used, to my knowledge. There is a consistency test named "RotatingFlow".

-Peter
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Re: How to set angular velocity?

Postby Nico » 11 Aug 2017, 16:35

Thanks a lot for your answers.

raback wrote:Hi

Note that turbulence + rotating frames is probably unknown territory. There indeed exists a rotating frame for Navier-Stokes but that has not been extensively used, to my knowledge. There is a consistency test named "RotatingFlow".

-Peter


Ok. I found some papers online, but i am still reading to solve it. Thanks ;)
Nico
 
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Re: How to set angular velocity?

Postby Nico » 12 Aug 2017, 20:27

mzenker wrote:Hi,

there is a keyword for that, see Models Manual, chapter 2.
If you use ElmerGUI, you can use the free text field in the Body Force window.

HTH,

Matthias


I want to know if i am doing in the right way.
In the Boundary Conditions - Navier Stokes. I set "Use normal-tangential coordinate system", and then i put the angular velocity i wanted in Velocity 3 (z axis).
It is ok?
Nico
 
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Re: How to set angular velocity?

Postby mzenker » 16 Aug 2017, 00:51

I don't know, I did not use the Navier-Stokes solver yet.
If you still have questions after reading the corresponding chapter in the Models manual, then someone with more knowledge on Navier-Stokes has to take over...

Matthias
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