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Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 11:18
Replies: 126
Views: 26,876
Posted By henry
We are planning to create a pa

We are planning to create a page on the web-site from which you will be able to download all our papers and reports but I am not sure when it will be ready. Recently I started pulling together all...
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 09:43
Replies: 126
Views: 26,876
Posted By henry
Unfortunately due to errors in

Unfortunately due to errors in the administrators of monet.me.ic.ac.uk the web-site is down/not accessible and we will have to find another home for these documents. Do you know which ones you would...
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 05:15
Replies: 126
Views: 26,876
Posted By henry
You should not rely on the def

You should not rely on the defaults and choose schemes appropriate for your case. If you are not sure what is appropriate you should try out combinations until you get the best balance between...
Forum: OpenFOAM Running, Solving & CFD April 28, 2005, 03:35
Replies: 126
Views: 26,876
Posted By henry
This is not a bug in the solve

This is not a bug in the solver it is unboundedness associated with your choice of discretisation schemes time-step etc. How negative is b? What schemes have you tried? What coefficient are you...
Forum: OpenFOAM Running, Solving & CFD March 23, 2005, 05:20
Replies: 126
Views: 26,876
Posted By henry
Have a look at the boundary co

Have a look at the boundary conditions each of these options sets for the fields and you will see the difference. You can reconfigure FoamX to give a different set of boundary conditions for your...
Forum: OpenFOAM Running, Solving & CFD March 23, 2005, 03:41
Replies: 126
Views: 26,876
Posted By henry
I have found the problem with

I have found the problem with the heat transfer, it does not relate to the temperature field T but to the unburnt gas temperature Tu so the problem only occurs for codes using the hhu* thermodynamics...
Forum: OpenFOAM Running, Solving & CFD March 18, 2005, 05:00
Replies: 126
Views: 26,876
Posted By henry
I think the difference in beha

I think the difference in behaviour between Foam2.2 and OpenFOAM is in the heat-transfer boundary condition. I can get the kivaTest case to run fine with adiabatic walls but not with fixed...
Forum: OpenFOAM Running, Solving & CFD March 17, 2005, 04:51
Replies: 126
Views: 26,876
Posted By henry
The specified ignition locatio

The specified ignition location is indeed outside the domain, try changing it to

location (0.03 0 0.091);
Forum: OpenFOAM Running, Solving & CFD March 17, 2005, 03:59
Replies: 126
Views: 26,876
Posted By henry
You are quite right, the kivaT

You are quite right, the kivaTest case fails to ignite. The problem appears to be with the location of the ignition point which I think is slightly outside the domain and with the new parallelised...
Forum: OpenFOAM Running, Solving & CFD March 15, 2005, 04:22
Replies: 126
Views: 26,876
Posted By henry
The Xi transport MUST be consi

The Xi transport MUST be consistent with the b transport and because the latter is implicit it can only be evaluated for the Xi equation after the b equation is solved. Consequently the Xi value...
Forum: OpenFOAM Running, Solving & CFD March 13, 2005, 13:42
Replies: 126
Views: 26,876
Posted By henry
That is what the Allrun script

That is what the Allrun script does anyway so it should have worked but try the script anyway just in case because as I say it works fine for me.
Forum: OpenFOAM Running, Solving & CFD March 13, 2005, 05:20
Replies: 126
Views: 26,876
Posted By henry
Tommaso, I ran the kivaTest

Tommaso,

I ran the kivaTest tutorial over night and it ran correctly to completion: -180 to 60. How did you perform the run? Did you use the Allrun script or run the equivalent sequence of...
Forum: OpenFOAM Running, Solving & CFD March 11, 2005, 09:29
Replies: 126
Views: 26,876
Posted By henry
Also the default should be set

Also the default should be set to 1 in the FoamX defaults files:

applications/combustion/Xoodles/defaults/combustionProperties.def ...
Forum: OpenFOAM Running, Solving & CFD March 11, 2005, 09:22
Replies: 126
Views: 26,876
Posted By henry
Yes it should be 1 for all cas

Yes it should be 1 for all cases for which the mesh is fine enough to produce good predictions for the turbulence properties and should certainly be 1 for all LES cases but I am not so sure about the...
Forum: OpenFOAM Running, Solving & CFD March 9, 2005, 03:46
Replies: 126
Views: 26,876
Posted By henry
It is VERY important with the

It is VERY important with the b-Xi model to ensure that b -> 0 and remains 0 in the ignition region otherwise the minimum b in the field will remain this value. Currently this is done by appropriate...
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