CFD Online Logo CFD Online URL
Home > Forums > FLUENT

multiphase granular flows; options for secondary phase

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

LinkBack Thread Tools Display Modes
Old   January 14, 2013, 06:49
Default multiphase granular flows; options for secondary phase
New Member
Join Date: Jan 2013
Posts: 2
Rep Power: 0
RockOn is on a distinguished road

I am working through a FLUENT tutorial where a impeller mixes a vessel with 1/3 sand and 2/3 water

@ moderator: I do not know if I am allowed to provide the ANSYS Tutorial here, otherwise please delete the link.

When specifying the secondary phase, there are different options to be specified. I really worked through the FLUENT user guide, the FLUENT theory guide and there mentioned papers.

Especially for

- the granular viscosity (kintetic part of the viscosity) --> "symlial-obrian" or "gidaspow"
- the granular bulk viscosity (resistance to diletation) --> "lun-et-al" or constant value

I do not understand the difference.

The according ANSYS user/theory guides just mention the options and related formulas. Also after reading through the related papers (Lun et al. & Symlial et al.) and hardly understanding their theories I can not figure out when/why to use which option for the two above mentioned parameters.

Can someone maybe explain me the differences of the options -- respectively in which to use in which cases -- for both parameters?

Thank you very much in advance.

kind regards
RockOn is offline   Reply With Quote

Old   January 15, 2013, 07:59
New Member
Join Date: Jan 2013
Posts: 2
Rep Power: 0
RockOn is on a distinguished road
Nobody out there who can help me?
RockOn is offline   Reply With Quote


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
reading nu for multiphase flows lindstroem OpenFOAM Programming & Development 9 September 20, 2011 05:20
Which phase do pathlines stand for in multiphase flow? bigfans FLUENT 1 August 14, 2011 14:23
How does FLUENT calculate turbulent mass diffusivity (m2/s) for the granular phase zhouwu FLUENT 0 August 6, 2011 04:51
Simulating a Paper Filter in Multiphase: How to Make Impassable by Secondary Phase? VT_Bromley FLUENT 0 February 24, 2011 00:27
Multiphase Multicomponent mass transfer -Initial condition pannsave CFX 10 February 9, 2011 02:12

All times are GMT -4. The time now is 20:33.