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

Staggered grid (sedimentation of solid particles)

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 30, 2010, 12:15
Default Staggered grid (sedimentation of solid particles)
  #1
TTY
New Member
 
Tatyana
Join Date: Oct 2010
Posts: 5
Rep Power: 6
TTY is on a distinguished road
Hi,

I am writing my first own DNS program for sedimentation. I have used a finite-difference method for solving the two-dimensional incompressible time-dependent non-linear Navier-Stokes equations, which were discretized using a staggered grid in space domain.

Can I use the same staggered grids in space for spherical solid particles of sediment?

What are the features of the boundary conditions? If I want to use staggered grids, should I use the conditions similar to the condition on the lid in the lid-driven cavity problem, where u[i][N+1]=2*u0-u[i][N], i.e. can I use something like that on the border solid particle-fluid?
u[i][j+1]=2*U[i][j]-u[i][j],
v[i][j+1]=2*V[i][j]-v[i][j], where U and V are the components of the particle velocity, u and v are the components of the fluid velocity.

Should I take into account that the particle rotation is equal to fluid vorticity at the boundary? I want to do calculation for small and high Re numbers.

Can I take into account only the change of sediment particle motion direction near the borders (walls) of rectangular cavity and leave the angular velocity of a rotating sediment particle without changing or not?

Thank you in advance for answers.
TTY is offline   Reply With Quote

Reply

Tags
boundary conditions, sedimentation, staggered grid

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
Dispersed Solid particles in carrier gas (DPM) Frederik FLUENT 1 June 3, 2008 05:13
about erosion problem caused by solid particles hannah CFX 4 August 20, 2003 04:42
CFX4.3 -build analysis form Chie Min CFX 5 July 12, 2001 23:19
staggered grid Matteo Manganelli Main CFD Forum 4 October 13, 1999 08:49
Incompressible flow solver (staggered grid) J. Ehrhard Main CFD Forum 1 October 8, 1998 19:47


All times are GMT -4. The time now is 15:23.