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

Numerical Diffusion of the Interface of a Patched Bubble

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 28, 2016, 07:18
Default Numerical Diffusion of the Interface of a Patched Bubble
  #1
New Member
 
Fengleng Yao
Join Date: Feb 2016
Posts: 1
Rep Power: 0
Rotkohl is on a distinguished road
Hi everyone,

I get a problem of the numerical diffusion of the phase boundary when simulating a rising bubble in quiescent liquid.

The case is that a single bubble of air (diameter=1mm) rises in a cubic container (8mm*8mm*6mm) fulfilled with water, which boundary condition of its bottom and side is set as Wall and the top the pressure-outlet. The case was simulated both in 2D and 3D and all the settings are the same. I patch the bubble in a circle or spherical region with the initial position (0.004m,0.004m,0.0025m). However, a serious numerical diffusion of the phase boundary occurs only in the 3D case (as shown in attachment Figure 1) when bubble have already rised for a while. As seen the interface contains 5 more cells, which is unreanable.

Can anyone help me to solve the problem?

Thank you!

P.S. The improtant settings of the case are presented in the attachments.
Attached Images
File Type: png Figure 1.png (79.0 KB, 11 views)
File Type: png Figure 2.png (32.0 KB, 12 views)
File Type: png Figure 3.png (17.8 KB, 12 views)
Rotkohl is offline   Reply With Quote

Reply

Tags
vof interface diffusion

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
Radiation in semi-transparent media with surface-to-surface model? mpeppels CFX 11 August 22, 2019 07:30
Waterwheel shaped turbine inside a pipe simulation problem mshahed91 CFX 3 January 10, 2015 11:19
GETVAR Error in Multiband Monte Carlo Radiation Simulation with Directional Source silvan CFX 3 June 16, 2014 09:49
pressure difference on bubble interface Ron FLUENT 0 June 24, 2004 06:09
Numerical diffusion error Z.Zeng Main CFD Forum 8 October 22, 1999 09:06


All times are GMT -4. The time now is 01:17.