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

Granular Temperature Model : Material

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 20, 2013, 18:44
Default Granular Temperature Model : Material
  #1
Member
 
Join Date: Apr 2012
Posts: 48
Rep Power: 6
vagaikwa is on a distinguished road
Hi,
Can someone please help me with defining the viscosity of the new material that I create in Granular Temperature Model. I don't know the viscosity of the material, I just have the density. What value should I input in that case in the viscosity? Thanks.
vagaikwa is offline   Reply With Quote

Old   January 31, 2017, 15:17
Smile Granular phase material property
  #2
New Member
 
Nimmy
Join Date: Nov 2016
Posts: 3
Rep Power: 2
Nimmy Kovoor is on a distinguished road
Fluent manual mentions that the only property of the granular phase that has to be specified is the density. It further says one can ''ignore'' the rest of the property values, not mentioning if we can use 0 as the input for these properties. Anyways I have experience of a crashing simulation when ''0'' was specified for the viscosity of the granular phase. So, I suggest a random value to be entered in this field. It must be understood that the viscosity (solid shear viscosity+ frictional viscosity) for granular phase is calculated through the user-chosen closure functions Fluent provides, if not user-defined functions . For ex. Lun et.al for bulk viscosity and so on.

please find the links to Fluent documentation for further details.
P.S: Even though it's a late reply, hope a newbie is helped through this and not waste precious computational resources doing trial and error to clarify this (like me)!!
https://www.sharcnet.ca/Software/Flu...ug/node947.htm
https://www.sharcnet.ca/Software/Flu...cosity-syamlal
Nimmy Kovoor 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
Granular model with 2d axisymmetric K.Fukumoto FLUENT 2 September 15, 2013 11:15
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
Problems with CEL (guess it's simple to solve) Felggv CFX 19 July 17, 2012 19:19
Simulation of a single bubble with a VOF-method Suzzn CFX 18 October 2, 2009 04:18
monitoring point of total temperature rogbrito FLUENT 0 June 21, 2009 17:31


All times are GMT -4. The time now is 17:49.