CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

some problem about "KIM, MOIN and MOSER" 's paper

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 10, 2016, 20:25
Default some problem about "KIM, MOIN and MOSER" 's paper
  #1
Senior Member
 
ztdep's Avatar
 
p ding
Join Date: Mar 2009
Posts: 404
Rep Power: 17
ztdep is on a distinguished road
Send a message via Yahoo to ztdep Send a message via Skype™ to ztdep
Dear friends:
In the paper of KIM, MOIN and MOSER, " Turbulence statistics in fully developed channel flow at low Reynolds number" , the incompressbile N-s equations and the continuity equations were reduced to a normal component of vorticity euqation and a fourth order equation for v.

I do not understand how to obtain the fourth oder equation for v velocity?
and why we only need the normal component of vorticity euqation .

Regards
ztdep is offline   Reply With Quote

Old   August 11, 2016, 04:42
Default
  #2
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,062
Rep Power: 64
FMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura about
I never worked on such formulation (and I don't like too), but it is of some interest now because the database for high Re number of Hojas, Jimenez and al. are based on such formulation (http://turbulence.ices.utexas.edu/co...anneldata.html).

I haven't done the manipulation needed but I suppose that you can derive the equations by applying the Laplacian to all the terms in the equation for the v component. The use the vorticity equation and project them over the normal component. Combining them, using the continuity equation you can eliminate the pressure term.

I hope someone who worked practically can give you more help.
FMDenaro is offline   Reply With Quote

Old   August 11, 2016, 05:11
Default
  #3
Senior Member
 
ztdep's Avatar
 
p ding
Join Date: Mar 2009
Posts: 404
Rep Power: 17
ztdep is on a distinguished road
Send a message via Yahoo to ztdep Send a message via Skype™ to ztdep
Quote:
Originally Posted by FMDenaro View Post
I never worked on such formulation (and I don't like too), but it is of some interest now because the database for high Re number of Hojas, Jimenez and al. are based on such formulation (http://turbulence.ices.utexas.edu/co...anneldata.html).

I haven't done the manipulation needed but I suppose that you can derive the equations by applying the Laplacian to all the terms in the equation for the v component. The use the vorticity equation and project them over the normal component. Combining them, using the continuity equation you can eliminate the pressure term.

I hope someone who worked practically can give you more help.
thank you very much for you feedback. I have understand it. we take the curl of the curl of NS equation, we can obtain the formulation.
ztdep is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 22:07.