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

How to calculate viscous dissipation in Fluent?

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

LinkBack Thread Tools Search this Thread Display Modes
Old   May 14, 2017, 17:07
Default How to calculate viscous dissipation in Fluent?
Join Date: Jun 2015
Posts: 46
Rep Power: 10
Hossein1 is on a distinguished road
Using VOF ith a laminar model, I'm simulating collision of a droplet and a spherical particle. The particle moves very fast (~7 m/s) and so penetrates into the falling droplet and deforms it to a thin liquid film (i.e. a lamella). Please see the attached picture for an overview of the process. Does anyone know what I need to do in Fluent to calculate the "viscous dissipation" takes place in the liquid phase during deformation (i.e from the impact moment until lamella detachment from the particle)?

Thank you!

PS. If there is a way by which I can have access to velocity field only inside the lamella (i.e. within the liquid phase only), then I can probably use the 'calculator device' in Fluent to calculate the velocity derivative to have phi function and then use the attached formula to calculate the energy dissipation. Is there any way to work only with the velocity inside the lamella?
Attached Images
File Type: png 71.png (44.2 KB, 34 views)
File Type: png 72.png (39.7 KB, 42 views)

Last edited by Hossein1; May 19, 2017 at 14:39.
Hossein1 is offline   Reply With Quote

Old   July 18, 2017, 12:42
Bhargav Bharathan
Join Date: Jun 2015
Location: Montreal, Canada
Posts: 71
Rep Power: 11
bhargavbharathan is on a distinguished road

If you are using Fluent 17 and later, the viscous dissipation can be turned on in Models->Energy.

bhargavbharathan is offline   Reply With Quote


droplet impact, viscous dissipation, vof simulation

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
How Fluent calculate Y+ for Multi fluids model mohibanwar Fluent Multiphase 1 August 29, 2015 20:40
How does fluent discretize the viscous term? motorbean FLUENT 3 August 25, 2015 16:38
How to compute the viscous dissipation term yhy20081016 Main CFD Forum 2 December 17, 2013 22:26
IS FLUENT A VISCOUS SOLVER?? karthik FLUENT 4 August 1, 2005 12:49
Viscous heat dissipation muhammad asif Main CFD Forum 0 July 25, 1998 04:00

All times are GMT -4. The time now is 12:59.