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Search: Posts Made By: mihaipruna
Forum: OpenFOAM Running, Solving & CFD May 27, 2015, 10:46
Replies: 27
Views: 678
Posted By mihaipruna
no, I had initial alpha=1.I was modeling boiling....

no, I had initial alpha=1.I was modeling boiling.
How many time steps did you run it for?
Forum: OpenFOAM Running, Solving & CFD May 27, 2015, 09:42
Replies: 27
Views: 678
Posted By mihaipruna
why not test it like they did in the tutorial, by...

why not test it like they did in the tutorial, by removing the bullet from the cavitatingBullet case and setting a temperature BC?

I don't have access to my case files right now.
Forum: OpenFOAM Running, Solving & CFD May 27, 2015, 07:45
Replies: 27
Views: 678
Posted By mihaipruna
As I posted earlier in the thread, to get it to...

As I posted earlier in the thread, to get it to work for me, I had to recompile
phaseChangeTwoPhaseMixture
Forum: System Analysis May 27, 2015, 07:43
Replies: 3
Views: 344
Posted By mihaipruna
thank you for the response, that is kind of what...

thank you for the response, that is kind of what I ended up doing, in Excel with VBA macros
Forum: OpenFOAM Running, Solving & CFD May 12, 2015, 08:05
Replies: 9
Views: 148
Posted By mihaipruna
VOF methods suffer from interface smearing. ...

VOF methods suffer from interface smearing.

Check out this paper and follow the references for the interface sharpening model.
http://www.djs.si/proc/nene2011/pdf/802.pdf
Forum: OpenFOAM Running, Solving & CFD April 24, 2015, 09:17
Replies: 27
Views: 678
Posted By mihaipruna
I think I have figure out how to get decent...

I think I have figure out how to get decent behavior, with decent time step size that allows you to simulate over longer periods of time.

I believe the evaporation rate was unphysical.
I used...
Forum: OpenFOAM Running, Solving & CFD April 21, 2015, 08:59
Replies: 27
Views: 678
Posted By mihaipruna
Version 2.3.1 The tutorial should be applied...

Version 2.3.1
The tutorial should be applied pretty much the same way except for the extra compilation for the libraries i mentioned

Also there is a Tfinal field in fvSolution which I made the...
Forum: OpenFOAM Running, Solving & CFD April 20, 2015, 13:49
Replies: 4
Views: 134
Posted By mihaipruna
I assume this solver uses the VOF method, so the...

I assume this solver uses the VOF method, so the interface will not be sharp. Maybe relative to the size of your bubbles , it gets smeared resulting in values less than 1.
Try with a more refined...
Forum: OpenFOAM Running, Solving & CFD April 17, 2015, 23:16
Replies: 27
Views: 678
Posted By mihaipruna
there is one extra step for Martin Andersen's...

there is one extra step for Martin Andersen's tutorial that is not specified I believe:

you have to recompile the phaseChangeTwoPhaseMixture, by going in that folder and typing wclean and then...
Forum: System Analysis March 19, 2015, 18:54
Replies: 3
Views: 344
Posted By mihaipruna
iterative analysis of water boiling under pressure

I'm trying to build a mathematical model of something like Heron's Aeolipile:
http://en.wikipedia.org/wiki/Aeolipile
I'd like to know, based on a known heat flux, the pressure and temperature...
Forum: OpenFOAM Running, Solving & CFD February 24, 2015, 23:19
Replies: 0
Views: 86
Posted By mihaipruna
interPhaseChangeFoam for boiling?

Is there a way to model the generation of bubbles through heat transfer rather than cavitation using this solver?
Forum: Main CFD Forum March 12, 2014, 18:48
Replies: 7
Views: 362
Posted By mihaipruna
there are no metrics because the coordinate...

there are no metrics because the coordinate system is not transformed.
I used Green's theorem to convert the surface integrals to line integrals (since it's a 2d code)

I created the ghost cells...
Forum: Main CFD Forum March 8, 2014, 10:57
Replies: 7
Views: 362
Posted By mihaipruna
Well I used ghost cells and what I thought were...

Well I used ghost cells and what I thought were good differential boundary conditions , but I still got increasing instability as I was solving the potential equation for a cell center potential as...
Forum: Main CFD Forum March 5, 2014, 11:16
Replies: 7
Views: 362
Posted By mihaipruna
hi Ramesh I'm using a cell centered approach...

hi Ramesh
I'm using a cell centered approach for solving potential flow over a body.
By cell centered I mean the potentials are calculated at cell centers, and my grid is the cell edges.
I need to...
Forum: Main CFD Forum March 4, 2014, 12:35
Replies: 2
Views: 521
Posted By mihaipruna
ELMER is your best bet probably. I posted a...

ELMER is your best bet probably.
I posted a workflow with free software here:

http://www.squidoo.com/interoperability-71851
Forum: Main CFD Forum March 3, 2014, 22:58
Replies: 7
Views: 362
Posted By mihaipruna
finite volume boundary conditions

please give me examples of boundary conditions for solving differential equations using the finite volume method, and how they are applied to the governing equations.
Forum: OpenFOAM Pre-Processing February 5, 2014, 09:54
Replies: 41
Views: 24,270
Posted By mihaipruna
Here's some issues people have helped me with for...

Here's some issues people have helped me with for internal flow:
http://www.cfd-online.com/Forums/openfoam-solving/99981-internal-flow-bcs-pressure-driven-versus-velocity-driven.html
Forum: Site Help, Feedback & Discussions February 5, 2014, 09:50
Replies: 2
Views: 912
Posted By mihaipruna
yes, i agree that a forum is much easier to use...

yes, i agree that a forum is much easier to use than a mailing list and would gain more traction.
Forum: OpenFOAM Pre-Processing February 5, 2014, 09:23
Replies: 41
Views: 24,270
Posted By mihaipruna
three things: did you actually type...

three things:

did you actually type "uniforme" in the input file?

try to set your free surface like freestream in the motorbike tutorial.

if no typos in the file, I would suggest a K-omega...
Forum: Main CFD Forum February 5, 2014, 09:17
Replies: 6
Views: 444
Posted By mihaipruna
http://cfd.mace.manchester.ac.uk/cgi-bin/cfddb/prp...

http://cfd.mace.manchester.ac.uk/cgi-bin/cfddb/prpage.cgi?82&EXP&database/cases/case82/Case_data&database/cases/case82&cas82_head.html&cas82_desc.html&cas82_meth.html&cas82_data.html&cas82_refs.html&c...
Forum: OpenFOAM Pre-Processing February 5, 2014, 09:10
Replies: 41
Views: 24,270
Posted By mihaipruna
Dadou: I can't see the attachments.

Dadou: I can't see the attachments.
Forum: Site Help, Feedback & Discussions January 8, 2014, 08:31
Replies: 2
Views: 912
Posted By mihaipruna
Should there be a forum dedicated o Elmer?

It seems to me Elmer (http://www.csc.fi/english/pages/elmer) is the easiest to use freeware Finite Element Analysis package out there. I would think it would have a decent user base.
For example,...
Forum: Main CFD Forum December 11, 2013, 13:42
Replies: 3
Views: 306
Posted By mihaipruna
need an overview on all the finite difference schemes

I'm studying for my CFD final and I need to memorize all the schemes used in finite difference methods.
I'd like a summary overview of the finite difference schemes for parabolic, elliptic and...
Forum: OpenFOAM Meshing & Mesh Conversion July 11, 2013, 10:48
Replies: 10
Views: 1,231
Posted By mihaipruna
we have developed a free tool that creates meshes...

we have developed a free tool that creates meshes (SHM, not msh) and cases from STL files, please register to download here:
http://cfd.cadnexus.com/

If you are set on using .msh files, you can...
Forum: OpenFOAM Native Meshers: snappyHexMesh and Others July 3, 2013, 17:03
Replies: 1
Views: 358
Posted By mihaipruna
we have a free OpenFOAM connector which works...

we have a free OpenFOAM connector which works with STL files and generates SHM inputs, you can also sign up to demo the full version which connects to several CAD packages and files.
...
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