CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM

icoFoam: Number of unkowns

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

LinkBack Thread Tools Display Modes
Old   April 29, 2011, 07:25
Default icoFoam: Number of unkowns
New Member
Join Date: Mar 2010
Posts: 20
Rep Power: 9
pbe_cfd is on a distinguished road
I have two quick questions in the frame of icoFoam:

say, an unstructured pure hexahedral mesh has M number of cells ;

1) Is the number of unknowns for pressure and velocity equal to M and the total number of unknowns equals to 2M?

2) How can one calculate the number of unknowns in general for OpenFOAM applications?

pbe_cfd is offline   Reply With Quote

Old   April 29, 2011, 09:05
Senior Member
akidess's Avatar
Anton Kidess
Join Date: May 2009
Location: Germany
Posts: 1,262
Rep Power: 23
akidess will become famous soon enough
Velocity is a vector, thus the total number of unknowns will be 4*M.

In general a scalar equation will add M, a vector equation 3*M unknowns.
akidess 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
Number of cells in mesh don't match with size of cellLevel colinB OpenFOAM Native Meshers: snappyHexMesh and Others 13 July 4, 2017 16:27
Unexpect icoFoam behavior skabilan OpenFOAM Running, Solving & CFD 0 September 28, 2010 14:02
Problems with Courant number (LaunderGibsonTurbulence Model) sven OpenFOAM 3 August 10, 2009 03:12
Courant number, patches, etc oort OpenFOAM 1 July 24, 2009 18:05
Strong oscillation at transonic mach number martingariepy FLUENT 2 May 12, 2009 11:40

All times are GMT -4. The time now is 07:33.