CFD Online URL
[Sponsors]
Home > Forums > FLOW-3D

Two Fluid bouyant problem and mesh

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 12, 2011, 07:49
Unhappy Two Fluid bouyant problem and mesh
  #1
New Member
 
Darío Martín Escala
Join Date: May 2011
Posts: 1
Rep Power: 0
DariusBic is on a distinguished road
I'm trying to simulate a problem of two layered fluids of different densities, such as Rayleigh-Taylor instability or double diffusive
My system consist in two layered fluids of different densities. (At first, without using scalar quantities with different diffusion coefficient, but I include it in the future)

When I want to simulate the Rayleigh-Taylor instability, noticed that the result varies with the number of cells that use. I tried to refine, but the result is always different.
My system is simple, just a rectangle defined between (-1, 1) for x coordinate, and (-3, 3) for y.
The first fluid is defined between (-3, 0) and the second between (0, 3).

My question is, How I can I know the proper size of cells so that the result is correct? Maybe any problem with the boundary conditions?

For this problem I use a inviscid flows and boundary conditions are continuity system for the coordinates, and wall to the x coordinate

Please any help is welcome

THANKS
DariusBic is offline   Reply With Quote

Reply

Tags
mesh, two fluids

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
[ICEM] surface mesh merging problem everest ANSYS Meshing & Geometry 39 June 5, 2013 20:02
2D Mesh Generation Tutorial for GMSH aeroslacker Open Source Meshers: Gmsh, Netgen, CGNS, ... 12 January 19, 2012 04:52
snappyHexMesh won't work - zeros everywhere! sc298 OpenFOAM Native Meshers: snappyHexMesh and Others 2 March 27, 2011 22:11
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 12:55
How to control Minximum mesh space? hung FLUENT 7 April 18, 2005 10:38


All times are GMT -4. The time now is 04:55.