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Showing results 1 to 25 of 47 Search took 0.00 seconds. Search: Posts Made By: akidess

Forum: OpenFOAM Programming & Development May 16, 2013, 03:02

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Ali Raeini has released some code now:... Ali Raeini has released some code now: http://www.cfd-online.com/Forums/openfoam/107861-how-parasitic-current-now.html#post427813

Forum: OpenFOAM Programming & Development June 13, 2012, 09:10

Replies: 135 parasitic currents Views: 32,429 Posted By akidess I believe so. Btw, using the filtering algorithm... I believe so. Btw, using the filtering algorithm as published on the repo, even the static droplet testcase doesn't work any more. After deactivating the filtering of fcf (but keeping it on phic) the...

Forum: OpenFOAM Programming & Development June 13, 2012, 03:20

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Results on the moving droplet case with filtering... Results on the moving droplet case with filtering improved, but are nowhere as good as the reference :/

Forum: OpenFOAM Programming & Development June 12, 2012, 07:11

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Filtering code is now online:... Filtering code is now online: http://code.google.com/r/akidess-interfoamfsf/

Forum: OpenFOAM Programming & Development June 12, 2012, 06:49

Replies: 135 parasitic currents Views: 32,429 Posted By akidess In my opinion this term is problematic, because... In my opinion this term is problematic, because it can lead to filtering normal to the interface if the curvature is small, see my previous post. Indeed, it's function is to avoid div0, but it's...

Forum: OpenFOAM Programming & Development June 11, 2012, 08:37

Replies: 135 parasitic currents Views: 32,429 Posted By akidess I started working on the filtering, and I... I started working on the filtering, and I stumbled across an issue with it's formulation. Have a look at the attached image - let's say it's an interface with a slight curvature. 'deltasf' is...

Forum: OpenFOAM Programming & Development June 7, 2012, 07:35

Replies: 135 parasitic currents Views: 32,429 Posted By akidess In my case the droplet retains it's shape and... In my case the droplet retains it's shape and position until 0.005s (100 time steps), after which it moves off-center and starts diffusing away completely (at this point the volume fraction field...

Forum: OpenFOAM Programming & Development June 4, 2012, 06:17

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Jakob, it's been great to share the development... Jakob, it's been great to share the development experiences and discuss with everyone as well. Feel free to check out this solver and see if it suits your needs, and share your experiences here no...

Forum: OpenFOAM Programming & Development June 4, 2012, 06:01

Replies: 135 parasitic currents Views: 32,429 Posted By akidess I'm going to stick with 2.0.x for now because I... I'm going to stick with 2.0.x for now because I have more custom solvers that I'd have to port. However, you can make your life easier by having mercurial do some of the changes for you: * Start...

Forum: OpenFOAM Programming & Development June 1, 2012, 04:13

Replies: 135 parasitic currents Views: 32,429 Posted By akidess I noticed something about the Crank-Nicholson... I noticed something about the Crank-Nicholson scheme - the programmers guide on page 43 states you have to implement a mixing of fvm and fvc terms manually! Is that really up to date, i.e. is it...

Forum: OpenFOAM Programming & Development May 31, 2012, 08:21

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Ok, I uploaded the case. What I did was... Ok, I uploaded the case. What I did was initialize the droplet shape starting from a square droplet of same volume, and then (after 0.0005s) turn on the background velocity field and start doing the...

Forum: OpenFOAM Programming & Development May 31, 2012, 07:41

Replies: 135 parasitic currents Views: 32,429 Posted By akidess I now have results on the moving droplet case... I now have results on the moving droplet case with the SSF and CSF formulations - see attachment. As expected, they are both not great.

Forum: OpenFOAM Programming & Development May 30, 2012, 08:02

Replies: 135 parasitic currents Views: 32,429 Posted By akidess I pushed updates to enable the use of adjustable... I pushed updates to enable the use of adjustable time stepping.

Forum: OpenFOAM Programming & Development May 24, 2012, 07:58

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Andrea, unfortunately I don't have results yet.... Andrea, unfortunately I don't have results yet. I'm busy with other things so I don't have much time to play with interFoamSSF these days. I'll report back once I have something. Good luck!

Forum: OpenFOAM Programming & Development May 23, 2012, 07:39

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Sorry, I totally misunderstood your initial... Sorry, I totally misunderstood your initial question! You are right that for a real capillary tube, there should be a no-slip on the walls and we'd have a parabolic flow profile if the flow is...

Forum: OpenFOAM Programming & Development May 23, 2012, 05:13

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Would there be a difference for laminar flow? All... Would there be a difference for laminar flow? All we need in the boundary condition is the face normal, which is available for a basic patch. I think the wall-BC is only needed for the turbulence...

Forum: OpenFOAM Programming & Development May 22, 2012, 11:17

Replies: 135 parasitic currents Views: 32,429 Posted By akidess I actually already had an STL file generated with... I actually already had an STL file generated with Salome (also trivial), I was just curious about what else can be used. Together with your dict file I also have a mesh now :) I did however turn off...

Forum: OpenFOAM Programming & Development May 22, 2012, 10:46

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Looks better than what I got with Gambit :) Which... Looks better than what I got with Gambit :) Which software did you use to generate the STL file? And can you upload your snappyHexDict? I thought I'd try the test case without filtering, see what...

Forum: OpenFOAM Programming & Development May 21, 2012, 10:40

Replies: 135 parasitic currents Views: 32,429 Posted By akidess I started thinking about the moving droplet test... I started thinking about the moving droplet test case. Does any one have suggestions how to best build the mesh in fig 6a (see attachment)?

Forum: OpenFOAM Programming & Development May 14, 2012, 09:00

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Indeed already after seeing your first results... Indeed already after seeing your first results (http://www.cfd-online.com/Forums/openfoam-programming-development/69673-parasitic-currents-4.html#post360557) with smoothing I've been thinking about...

Forum: OpenFOAM Programming & Development May 14, 2012, 05:06

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Pei-Ying, the repository version still uses... Pei-Ying, the repository version still uses alpha1_ to calculate 'w' in interfaceProperties.C. If unboundedness is larger than 1e-6, then that can lead to problems. If you change line 131...

Forum: OpenFOAM Programming & Development May 14, 2012, 04:41

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Andrea, here is the setup I used. Did you... Andrea, here is the setup I used. Did you remember to change setFieldsDict?

Forum: OpenFOAM Programming & Development May 13, 2012, 16:19

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Andrea, you were right about the domain size -... Andrea, you were right about the domain size - use a larger domain, and the convergence problems go away :) The smearing along the mesh direction is somewhat weird, but doesn't seem to be reflected...

Forum: OpenFOAM Programming & Development May 11, 2012, 08:30

Replies: 135 parasitic currents Views: 32,429 Posted By akidess You are right about the ordering of the phases.... You are right about the ordering of the phases. Do you think it's a concern that the liquid droplet performs worse?

Forum: OpenFOAM Programming & Development May 11, 2012, 06:56

Replies: 135 parasitic currents Views: 32,429 Posted By akidess Andrea, I'd be thankful if you could use an... Andrea, I'd be thankful if you could use an unmodified build of interFoamSSF and the test case (it takes about 30 min on my system to run) and check your results, and then try to isolate which of...

Showing results 1 to 25 of 47

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