CFD Online Discussion Forums

RUnning FIRE from cmd prompt

Posted February 14, 2018 at 01:49 by Nartasan

Quote:

Originally Posted by cfdvenkatesh

You can use "fire_cmd --help" to know all the options.

Easier way to get started is to launch the FIRE job from GUI and look for a command in job_setup.log file in case directory.

The FIRE 2017.1 version should have an option to directly submit into queuing system from GUI

Hi cfdvenkatesh,

We only have avl2014 installed in our HPC. By the way, I'm mostly using linux environment so I run the simulation in bash.
...

Nartasan

New Member

Posted in Uncategorized

Views 1663 Comments 0 Nartasan is offline

Tutorial of how to plot residuals !

Posted February 6, 2018 at 19:59 by TurbJet

Quote:

Originally Posted by wolle1982

Hi all,

since apearantly noone has an idea of how to plot the residuals of a calculation on-the-fly, I will give a small manual on that:

Tutorial on "How to plot the residuals (and forces) graphically on screen on-the-fly"

Step 1:
Start the calculation and make it write out a log-file. for example

turbFoam >log

"log" is the name of the log-file to be output. It is written into the main-case-folder.

...

TurbJet

Senior Member

Posted in Uncategorized

Views 1517 Comments 0 TurbJet is offline

Meshing with Solome for OpenFOAM

Posted January 26, 2018 at 16:13 by makaveli_lcf (test)

Tags cad, meshing, openfoam, preprocessing, salome

So I have started to study Salome for the drawing and meshing geometries for the OpenFOAM applications.

It is very easy tool to create geometries, in my case first try was continuous casting mold with a submerged entry nozzle.

Meshing order

Mesh the edges, especially feature edges
Mesh faces with the transition from smaller elements near the features to bigger ones away from them (where it is actually needed)
Mesh the rest of the volume mesh

makaveli_lcf

Senior Member

Posted in Preprocessing

Views 1463 Comments 0 makaveli_lcf is offline

pressure eq. "converges" after few time steps

Posted December 1, 2017 at 06:05 by kindle

Have a thread about simplefoam convergence.

Quote:

Originally Posted by maddalena

thank you, however:

corrected is extra, isn't it?

This will no improve the initial convergence, since the solver will stop when the relTol is 0.05. thus it will not run until 1E-12 but stop at 0.05. And pressure equation will be not converged smoothly, I guess. What are your experience on the subject? What do you mean with not efficient?

Somewhere else it has been suggested to use pressure

...

kindle

New Member

Posted in Uncategorized

Views 3409 Comments 0 kindle is offline

Controlling y+ values with snappyHexMesh?

Posted November 30, 2017 at 14:04 by kindle

This can be useful y+ control !

Quote:

Originally Posted by seaspray

Pete,

It might have got easier in the more recent versions. In a nutshell, you mesh your volume with a suitable algorithm (tets or hexa i,j,k) and viscous layers are added as an "additional hypothesis" in the 3D algorithm settings. In there, you have the option of excluding some faces in your geometry, like inlet, outlet, but also areas where you don't care as much about flow modeling like in some multiphase flow computations.

...

kindle

New Member

Posted in Pre-processing

Views 2446 Comments 0 kindle is offline