FDS and Smokeview Discussions Google Group

Re: install help required

2010-01-07T18:09:15Z

start an issue on the issue tracker. Make sure you tell us what type
of linux install you are using (particularly whether it is 32 or 64
bit) Also attach your pplume5.smv file . Note that if you are using a
64 bit computer/OS both the 32 and 64 versions of FDS will run.
However, only a 64 bit version of Smokeview will run on a 64 bit

Re: inquire

2010-01-07T18:03:12Z

Hi,
even for RANS models, this would be not suitable and using a symmetry in
LES is not suitable...
Fabian

Re: inquire

2010-01-07T18:03:01Z

Hi,
even for RANS models, this would be not suitable and using a symmetry in
LES is not suitable...
Fabian

Re: Fds+blender+gbXML?

2010-01-07T16:23:46Z

Hi Fabian,
We use snappyHexMesh frequently in our project that gbXML2STL comes
from. The first iteration of snappyHexMesh does it's first approach as
a cartesian mesh, based on the enveloping base mesh. A bit of "target
practice" for the base mesh might actually provide a very good
approach to making an adjusted mesh to the room. The openings are

Re: fds accuracy/convergence/stability

2010-01-07T16:11:43Z

The algorithms are different. Suppose you have an incompressible flow,
del dot u = 0. The momentum equation in FDS is written
rho du/dt + F + grad p = 0
Since rho is constant (in this example, not in general), you can take
the divergence of the equation
del^2 p = -div dot F
FDS solves this equation using a direct Poisson solver, so that when

Re: Problem using for Window 64 bit

2010-01-07T15:51:44Z

Whenever you have trouble with the 64 bit version of FDS, try the 32
bit version. If that fails, submit the case to the Issue Tracker.

Re: inquire

2010-01-07T15:47:21Z

You cannot do that. Just add the ISOF line and you will get output for
all meshes.

Re: Leakage location

2010-01-07T15:45:19Z

The idea of the leakage model is to approximate the leak from a
compartment that is not necessarily concentrated in one place. I
usually apply the leak area to the entire wall, or door, or whatever.
It was not designed to distinguish between the floor and ceiling. It
might be possible to include local pressure or stratification effects,

Re: fds accuracy/convergence/stability

2010-01-07T15:09:04Z

I made a mistake in my previous message.
In the second line the word "converged" as to be replaced by
"correct".
Sorry,
Julien
Julien a écrit :

Re: fds accuracy/convergence/stability

2010-01-07T15:01:15Z

Christopher,
I totally agree with you. If the residuals reach the trigger values,
that does not mean that the solution is "converged". However, in my
opinion, monitoring these values (without setting any trigger level)
is important and give a first clue of the "goodness" of the solution.
In a nutshell, my original question was: As there is no way to monitor

Re: Fds+blender+gbXML?

2010-01-07T13:36:53Z

Hi Bruno,
as you are already using OpenFOAM... do you have experience with
snappyHexMesh and what do you think about it's ability to create
cartesian meshes based on STL geometries? With some additional
programing this might be quite powerful for FDS 'OBST' approach (though
I am not sure, if FDS is able to handle hanging nodes with its FFT solver)?

Re: How to simulate a fire of highland

2010-01-07T13:23:49Z

Ann,
Search the User's Guide for P_INF and Y_O2_INFTY.
Cheers,
R

Re: More on RESTART 'issues'

2010-01-07T12:40:18Z

I would use the time to calculate the 100 steps, when FDS normally
outputs a message about status, as a guide from the .out file. I have
not previously done timings with reading in the restart file, but
would look at the number of cells, meshes and particles. I would then
have to make an estimate about setup time, but I do not have a

Re: Problem using for Window 64 bit

2010-01-07T12:02:03Z

Greetings Avalaki,
The folder "c:\Program Files" is a protected folder, so users without
administrative powers cannot write in files and folders inside that
folder. So you have 3 options:
- start FDS with administrative powers (right click on the icon or
executable and pick "Run as administrator..."), but this isn't very

Re: Fds+blender+gbXML?

2010-01-07T11:50:01Z

Greetings to All,
Shariq, I'm also a mechanical engineer and currently working for
blueCAPE in Portugal. We are working on a software development project
for simulating inside buildings modeled by applications such as Revit
and ArchiCAD. A byproduct as come during the project, a tool to export
from gbXML to STL (stereolithography). Sadly, FDS isn't currently able