Search found 72 matches
- 24 Mar 2011, 22:22
- Forum: General
- Topic: Units of measure?
- Replies: 4
- Views: 5203
Re: Units of measure?
This has been answered many times before. Elmer assumes you use a consistent set of units-IE if you input everything in SI units, your output will be in SI units.
- 07 Mar 2011, 21:39
- Forum: ElmerSolver
- Topic: Thermal Compressibiliy
- Replies: 1
- Views: 1862
Thermal Compressibiliy
In the Navier-Stokes exations, one of the material compressibility model options is ''Thermal'', would I be correct in assuming that this is Isothermal compressibility I.E. compressibility with constant temperature?
- 03 Mar 2011, 13:43
- Forum: General
- Topic: Elmer Tutorial 13:Compressible flow passing a step
- Replies: 5
- Views: 5665
Re: Elmer Tutorial 13:Compressible flow passing a step
So, I got a bit futher with this, though I must admit to feeling as though I shouldnt trust the convergence of the heat equation:
what does this do?
As an aside, if I set
Code: Select all
Compressibility Model = "Thermal"
- 01 Mar 2011, 16:46
- Forum: General
- Topic: Elmer Tutorial 13:Compressible flow passing a step
- Replies: 5
- Views: 5665
Re: Elmer Tutorial 13:Compressible flow passing a step
I constructed my own sif file from the instructions in the tutorial and the step.grd file I found in the distributio, albeit from the GUI section. In any case my test with a self constructed (in gmsh) step have also failed...
- 01 Mar 2011, 15:16
- Forum: General
- Topic: Elmer Tutorial 13:Compressible flow passing a step
- Replies: 5
- Views: 5665
Elmer Tutorial 13:Compressible flow passing a step
I am trying to re-create the results displayed in the (non-GUI) tutorial 13 using compressible Navier Stokes&the heat equation. I have followe dthe instruction in the tutorial, and used the step.grd mesh provided, but I do not get the results in the tutorial, in fact I do not get any results at ...
- 10 Nov 2010, 15:17
- Forum: ElmerPost
- Topic: How to calculate the forces due the pressure in navier-stoke
- Replies: 16
- Views: 23988
Re: How to calculate the forces due the pressure in navier-stoke
Apologies-I am using an old (about 1 year old) version of the models manual-hence the 33.1 rather than 36.1 in the most recent version. So, as I understand, the fluid force is computed normal to each boundary element, then when it is displayed in the user specified output file for the boundary sum o...
- 09 Nov 2010, 19:27
- Forum: ElmerPost
- Topic: How to calculate the forces due the pressure in navier-stoke
- Replies: 16
- Views: 23988
Re: How to calculate the forces due the pressure in navier-stoke
May I resurrect this thread.... (it seemed more apt to add my query here rather than open a new topic) I am using the fluidic force, with the boundary sum over surfaces. Now the output force is in x y and z directions, as opposed to normal (or parallel) to the surface (which is fine, one can calcula...
- 03 Nov 2010, 15:55
- Forum: ElmerSolver
- Topic: Fluidic Force solver output
- Replies: 2
- Views: 2492
Re: Fluidic Force solver output
Thankyou Peter, That makes sense.
I am using the ''calculate loads'' and incompressible Navier-Stokes equation, which explains why the 4th component (continuity) is about 10 orders of magnitude smaller than the other three components.
I am using the ''calculate loads'' and incompressible Navier-Stokes equation, which explains why the 4th component (continuity) is about 10 orders of magnitude smaller than the other three components.
- 03 Nov 2010, 12:46
- Forum: ElmerSolver
- Topic: Fluidic Force solver output
- Replies: 2
- Views: 2492
Fluidic Force solver output
Greetings, There is a fai amount of information on the fluidic force solver here: http://www.elmerfem.org/forum/viewtopic.php?f=8&t=480 which has assisted me to get this solver working nicely. However, I do have one question: the solver adds an extra four columns (in 3D) to the output (.ep file)...
- 29 Oct 2010, 19:33
- Forum: ElmerPost
- Topic: Wrong (?) results
- Replies: 7
- Views: 8150
Re: Wrong (?) results
As to the first question, I think the answer that you're looking for is that co-ordinates 1,2 and 3 relate to x, y, and z.