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

no VOrtex Shedding flow past a 2D cylinder

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

Like Tree2Likes
  • 1 Post By FMDenaro
  • 1 Post By agd

Reply
 
LinkBack Thread Tools Display Modes
Old   November 15, 2012, 15:08
Question no VOrtex Shedding flow past a 2D cylinder
  #1
New Member
 
Muhammad Sufyan
Join Date: Jun 2012
Posts: 8
Rep Power: 5
Sufyan is on a distinguished road
Send a message via Skype™ to Sufyan
HI

I want to simulate vortex shedding downstream 2D circular cylinder with 200 Reynolds number, my mesh is correct.

i want to know the best turbulence model to get accurate and better results, i have simulated first using laminar model and got VS

I am asked to do this using some turbulent model

k-epsilon
k-omega or any one else


suggest me please with reason


Thanks in advance
__________________
SUFI
Sufyan is offline   Reply With Quote

Old   November 15, 2012, 15:48
Default
  #2
Super Moderator
 
Oliver Gloth
Join Date: Mar 2009
Location: Todtnau, Germany
Posts: 116
Rep Power: 8
ogloth is on a distinguished road
Re 200 is laminar!
ogloth is offline   Reply With Quote

Old   November 15, 2012, 16:07
Default
  #3
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 1,662
Rep Power: 23
FMDenaro will become famous soon enough
Quote:
Originally Posted by ogloth View Post
Re 200 is laminar!

Indeed, is a flow condition very easy to solve for all the flow scales, no turbulence model is necessary, only a good mesh
Sufyan likes this.
FMDenaro is offline   Reply With Quote

Old   November 15, 2012, 16:37
Question
  #4
New Member
 
Muhammad Sufyan
Join Date: Jun 2012
Posts: 8
Rep Power: 5
Sufyan is on a distinguished road
Send a message via Skype™ to Sufyan
Quote:
Originally Posted by FMDenaro View Post
Indeed, is a flow condition very easy to solve for all the flow scales, no turbulence model is necessary, only a good mesh

thank you , can i do my research work on the basis of laminar model for a publication
second is someone told me that laminar model is ideal model , and if i want to simaulate transient flow in fluent i have to use any other model ,


is it right?


thanks
__________________
SUFI
Sufyan is offline   Reply With Quote

Old   November 15, 2012, 16:43
Default
  #5
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 1,662
Rep Power: 23
FMDenaro will become famous soon enough
Quote:
Originally Posted by Sufyan View Post
thank you , can i do my research work on the basis of laminar model for a publication
second is someone told me that laminar model is ideal model , and if i want to simaulate transient flow in fluent i have to use any other model ,


is it right?


thanks
what "ideal model" stands for you?
FMDenaro is offline   Reply With Quote

Old   November 15, 2012, 16:49
Default
  #6
New Member
 
Muhammad Sufyan
Join Date: Jun 2012
Posts: 8
Rep Power: 5
Sufyan is on a distinguished road
Send a message via Skype™ to Sufyan
Quote:
Originally Posted by FMDenaro View Post
what "ideal model" stands for you?

he(a senior student) told me laminar model is not suitable , ideal doesnt means best for my case , ideal in sanse like carnot cycle which is ideal but do not exist,

means i can not present results based on laminar model ..
__________________
SUFI
Sufyan is offline   Reply With Quote

Old   November 15, 2012, 18:30
Default
  #7
agd
Senior Member
 
Join Date: Jul 2009
Posts: 191
Rep Power: 8
agd is on a distinguished road
Your friend is wrong. Laminar flow is quite real and at a Re=200 the flow around a cylinder is laminar, even in the real world.
Sufyan likes this.
agd is offline   Reply With Quote

Old   November 16, 2012, 02:13
Default
  #8
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
I did it again recently. Do you need all files? See this thread, you will very useful info here Meshing in Gambit for analysis of flow past cylinders
Far is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Undergrad Civil Student: need help with simulating 2d flow past a square cylinder Karim Byasse Main CFD Forum 0 May 5, 2012 22:58
3D cylinder and Vortex Street shedding issues josik_1982 FLUENT 2 July 17, 2010 10:19
Vortex shedding behind cylider in cross flow Muthu FLUENT 0 March 6, 2006 11:29
Flow Past a Cylinder Annie Main CFD Forum 2 March 31, 2002 01:02
Simulation of the Flow past a circular cylinder using STAR-CD M. S. GUEROUACHE Main CFD Forum 0 October 1, 1998 10:51


All times are GMT -4. The time now is 09:10.