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

about Upwind scheme calculations

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 14, 2024, 10:47
Default about Upwind scheme calculations
  #1
Member
 
Kim jeamin
Join Date: Jul 2023
Posts: 36
Rep Power: 3
mongya is on a distinguished road
I am trying to solve simple algorithm in 2d cartesian coordinate with upwind scheme. It seems necessary to know the direction of flow even if not knowing the exact value of velocity to solve discretized momentum equations because upwind scheme is strongly affected by direction of flow. Is that right?
mongya is offline   Reply With Quote

Old   July 14, 2024, 12:37
Default
  #2
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,830
Rep Power: 73
FMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura about
Quote:
Originally Posted by mongya View Post
I am trying to solve simple algorithm in 2d cartesian coordinate with upwind scheme. It seems necessary to know the direction of flow even if not knowing the exact value of velocity to solve discretized momentum equations because upwind scheme is strongly affected by direction of flow. Is that right?



Yes, you need to compute the local sign of the velocity to adapt the stencil according to the upwind criterion
FMDenaro is offline   Reply With Quote

Old   July 15, 2024, 03:51
Default
  #3
Member
 
Kim jeamin
Join Date: Jul 2023
Posts: 36
Rep Power: 3
mongya is on a distinguished road
Quote:
Originally Posted by FMDenaro View Post
Yes, you need to compute the local sign of the velocity to adapt the stencil according to the upwind criterion
Thank you for your answer Mr. FMDenaro.
mongya is offline   Reply With Quote

Reply


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Implicit upwind scheme for euler equations ilovemountains Main CFD Forum 1 February 21, 2018 04:01
First order upwind scheme can produce better results? Achilleas FLUENT 5 January 3, 2018 19:33
2nd order upwind vs 2nd order upwind!!! Far Main CFD Forum 7 March 14, 2013 12:29
Error with higher order (2nd, GAMMA) upwind scheme quarkz Main CFD Forum 0 September 24, 2012 03:02
fifth upwind biased scheme K S Chang Main CFD Forum 0 December 5, 2003 03:46


All times are GMT -4. The time now is 20:37.