CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Gradient Adaption

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

LinkBack Thread Tools Search this Thread Display Modes
Old   August 17, 2001, 10:26
Default Gradient Adaption
Posts: n/a

When I do Gradient Adaption, how much for the refine threshold value for adaption? In fact, the default value for Fluent is 1e10, I think it's too much. Anyone have a better idea?


  Reply With Quote

Old   August 20, 2001, 01:42
Default Re: Gradient Adaption
Armin Gips
Posts: n/a
There is an article in the FluentNews volume 10 about adaption. "To determine the refinement threshold, many engineers like to use what is known as the 10% rule, whiche states that a cell should be refined whenever the computes gradient is above 10% of the maximum value"

Yours Armin
  Reply With Quote

Old   August 27, 2001, 10:26
Default Re: Gradient Adaption
Volker Pawlik
Posts: n/a
Hi, like always it depends on the case. To resolve the shear layer of a free submerged jet I had to use a refine threshold of 1E-5 (while the max was 0.007) to get results for the entrained massflow wich were comparable to measurements.

  Reply With Quote


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fluent: Mesh Adaption based on Gradient enigma FLUENT 4 July 15, 2010 17:36
Gradient Adaption aggie FLUENT 0 April 22, 2010 15:20
On Gradient Grid Adaption David FLUENT 2 May 2, 2005 15:50
Errors during Gradient Adaption Nandu FLUENT 1 November 3, 2003 09:30
Gradient adaption Mohamed FLUENT 1 June 2, 2003 12:22

All times are GMT -4. The time now is 19:21.