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

The effect of setting parameters on the roll type flow

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 5, 2013, 12:55
Default The effect of setting parameters on the roll type flow
  #1
New Member
 
sa
Join Date: Jul 2012
Posts: 23
Rep Power: 5
saharesobh is on a distinguished road
Hello every one,

Hope you are all doing great. I have a question. Actually I am evaluating the effect of the setting parameters (pressure, temperature, velocity and viscosity) on the flow behavior( for instanced longitudinal and transversal roll). For instance, I saw that when I increased the velocity in Ansys Fluent, the roll type flow appeared, but when I increased the pressure the change on the flow pattern was very intangible( minor). Actually all of my result comes from my observation. For example, by looking at the vectors, I figured out the pressure did no have much effect on the flow behavior. Because I did not see much change. My question is that is it any other criteria other than observation of the vectors? Would you please give me some suggestion?

Thanks in advance,
saharesobh is offline   Reply With Quote

Old   February 9, 2013, 17:49
Default
  #2
Senior Member
 
Syavash
Join Date: Apr 2010
Location: Tehran, Karaj
Posts: 241
Rep Power: 8
syavash is on a distinguished road
Quote:
Originally Posted by saharesobh View Post
Hello every one,

Hope you are all doing great. I have a question. Actually I am evaluating the effect of the setting parameters (pressure, temperature, velocity and viscosity) on the flow behavior( for instanced longitudinal and transversal roll). For instance, I saw that when I increased the velocity in Ansys Fluent, the roll type flow appeared, but when I increased the pressure the change on the flow pattern was very intangible( minor). Actually all of my result comes from my observation. For example, by looking at the vectors, I figured out the pressure did no have much effect on the flow behavior. Because I did not see much change. My question is that is it any other criteria other than observation of the vectors? Would you please give me some suggestion?

Thanks in advance,
Dear Sahar,

It seems that you are newbye in CFD!! There are some parameters which should be checked such as: shear stress at the wall, pressure distribution along the pipe, average velocity or core velocity along the pipe, heat flux at the wall (if energy is solved), y+ value along the wall (if flow is turbulent) and so on.
Goodluck.
syavash 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
LES supersonic free jet martyn88 OpenFOAM 22 April 17, 2015 06:00
second order schemes marine OpenFOAM 66 October 26, 2014 12:10
Boundary condition setting for non-premixed combustion using reactingFoam skyopener OpenFOAM 0 May 23, 2010 22:55
buoyantSimpleRadiationFoam msarkar OpenFOAM 0 February 15, 2010 07:22
Warning 097- AB CD-adapco 6 November 15, 2004 05:41


All times are GMT -4. The time now is 18:37.