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Search took 0.00 seconds. Search: Posts Made By: niklas
Forum: OpenFOAM Running, Solving & CFD October 24, 2008, 02:34
Replies: 74
Views: 10,958
Posted By niklas
A phase is defined by its dens

A phase is defined by its density, viscosity and characteristic size.
dragPhase is used to define from which phase the size information is to be taken, ie. which one is to be used to calculate the...
Forum: OpenFOAM Running, Solving & CFD March 24, 2006, 08:40
Replies: 74
Views: 10,958
Posted By niklas
As I undertand this code has g

As I undertand this code has gone through some improvements and if you want it included in the official 1.3 version, it might be good to send it to Henry.
Cleaned up of course.

Niklas
Forum: OpenFOAM Running, Solving & CFD October 3, 2005, 02:07
Replies: 74
Views: 10,958
Posted By niklas
Dont remember. the div-sche

Dont remember.

the div-schemes for the neff terms should be linear.
Forum: OpenFOAM Running, Solving & CFD September 25, 2005, 02:31
Replies: 74
Views: 10,958
Posted By niklas
You say that you dont have a s

You say that you dont have a singularity,
but what happens if you use max(1.0-alpa, SMALL) instead...

AUTO_WRITE should work and also Info...
Are you running the 'correct' code.
Are you...
Forum: OpenFOAM Running, Solving & CFD September 23, 2005, 12:13
Replies: 74
Views: 10,958
Posted By niklas
OK, so there's a division by z

OK, so there's a division by zero somewhere (probably).
What does the line above the Foam::divide() say?
Forum: OpenFOAM Running, Solving & CFD September 20, 2005, 02:26
Replies: 74
Views: 10,958
Posted By niklas
I'm guessing the problem is th

I'm guessing the problem is the fricitional normal stress term pf.
You could try and set Fr to 0.0 in kineticTheoryProperties to disable it and/or

have a look in kineticTheoryModel.C
...
Forum: OpenFOAM Running, Solving & CFD September 19, 2005, 03:01
Replies: 74
Views: 10,958
Posted By niklas
Hi, The radial distribution

Hi,

The radial distribution is one of the things that
'has room for improvement'.
As you probably have seen, g0 is clipped when
alpha goes above maximum packing, so it shouldnt become...
Forum: OpenFOAM Running, Solving & CFD September 4, 2005, 03:29
Replies: 74
Views: 10,958
Posted By niklas
Hi, mistake, should be pa

Hi,

mistake, should be
pa_ = PsCoeff*Theta;

N
Forum: OpenFOAM Running, Solving & CFD August 26, 2005, 13:24
Replies: 74
Views: 10,958
Posted By niklas
May I just add that this code

May I just add that this code was released in an experimental state hoping that the users will improve it, the kinetic theory stuff is relatively untested and may contain bugs, (Henry found some...
Forum: OpenFOAM Running, Solving & CFD August 26, 2005, 12:33
Replies: 74
Views: 10,958
Posted By niklas
Hi, Starting with a void fr

Hi,

Starting with a void fraction at maximum packing is not good. This is most likely your problem.
Try to modify the code that sets the initial conditions so that
alpha is something like ...
Forum: OpenFOAM Running, Solving & CFD August 26, 2005, 11:01
Replies: 74
Views: 10,958
Posted By niklas
Here's what I've learned...

Here's what I've learned...

You have to break down the 'symmetry' very fast to avoid over-packing, either by a small asymmetry in inlet velocity or by small differences in initial void-fraction....
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