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

Hydraulic Diameter or Length Scale

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 11, 2004, 10:43
Default Hydraulic Diameter or Length Scale
  #1
Bob
Guest
 
Posts: n/a
I am simulating a 3D gas turbine combustor. What would be the best to use length scale or hydraulic diameter. My first run will be non-reacting. Also, if I use length scale would I choose the height or the width of the outlet. Or maybe it would be better to use the viscosity ratio. Most of the tutorials are 2D and with 3D this issue has always been confusing to me. Any help will be appreciated.
  Reply With Quote

Old   June 11, 2004, 10:49
Default Re: Hydraulic Diameter or Length Scale
  #2
Tom
Guest
 
Posts: n/a
I would use Hydraulic Diameter and take the diameter as that of the outlet/inlet.
  Reply With Quote

Old   June 11, 2004, 11:56
Default Re: Hydraulic Diameter or Length Scale
  #3
Bob
Guest
 
Posts: n/a
Now, would I use the height of the outlet or the length?
  Reply With Quote

Old   June 17, 2004, 10:13
Default Re: Hydraulic Diameter or Length Scale
  #4
martin
Guest
 
Posts: n/a
In Fluent there is a simple relation between length scale and characteristic dimension (diameter): l=0.07*L
  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
Turbulence length scale and integral length scale rizhang CFX 2 April 22, 2016 08:22
hydraulic diameter in 2d ahsan FLUENT 2 August 28, 2009 16:22
Importance of Hydraulic Diameter Value for Compressible Flow RyGuy FLUENT 0 August 6, 2009 11:58
Length Scale vs. Hydraulic Diameter? Will FLUENT 1 April 13, 2004 07:09


All times are GMT -4. The time now is 01:37.