Search found 50 matches

by dmitry
25 Jul 2018, 14:36
Forum: ElmerSolver
Topic: Turbulent flow at high Reynolds number - Convergence problem
Replies: 17
Views: 982

Re: Turbulent flow at high Reynolds number - Convergence problem

Hi guys! Here is my experiments on Kumar's case with triangular 2D mesh and 3D tetrahedral mesh. 2D mesh: https://drive.google.com/open?id=1t1cWZBrS4_wXeEv7P6h_AQwyYMrz7wG9 All is OK. 3D mesh: https://drive.google.com/open?id=1bm07ZWHiWeEDVx6cbngfW7J0rQlEZKmO God damn hard... One have to decrease Re...
by dmitry
20 Jul 2018, 13:58
Forum: ElmerSolver
Topic: Elmersolver crashes when Porous Media is activated
Replies: 11
Views: 309

Re: Elmersolver crashes when Porous Media is activated

Hi! I remember, there was nice conversation with you a year ago :D May be now I also can help you. I made a simple 2D GUI case for you (see in Mesh_1 folder), where massive composite casing of A356 alloy is crystallizing. Elmer model manual says that for porous medium flow resistivity is to be speci...
by dmitry
10 Nov 2017, 16:59
Forum: Software development
Topic: Save materials - GUI definition
Replies: 0
Views: 405

Save materials - GUI definition

Hi Elmer team!
I have made savematerials.xml.
Please check it and if it's OK, I'll be happy to see it in new Elmer release.
by dmitry
15 Mar 2017, 16:47
Forum: General
Topic: Beginner's troubles
Replies: 3
Views: 1145

Re: Beginner's troubles

You're welcome! ;)
by dmitry
14 Mar 2017, 09:33
Forum: General
Topic: Beginner's troubles
Replies: 3
Views: 1145

Re: Beginner's troubles

Hi! First issue: You can scale the mesh in ElmerGUI, just paste in Model-->Setup-->Simulation-->Free Text following instruction Coordinate Scaling = 0.001 Second issue: Heat flux q=k*dT/dn is in W/m² (Eqn. 1.18 in Models Manual). Anyway, you can use any unit system. But you have to rescale all the m...
by dmitry
14 Mar 2017, 08:52
Forum: ElmerSolver
Topic: Heat simulation mesh lvl3 cylinder shape issue
Replies: 7
Views: 906

Re: Heat simulation mesh lvl3 cylinder shape issue

Hi! Unfortunately I was not able to solve with Mesh Levels = 3 on my computer due to lack of memory (as Peter said). But I suppose,it's the mesh issue. IMHO: In the thin layers of 0.04 and 0.07 mm thickness the elements has wary sharp angles in Temp. gradient direction. After 3 splitting operations ...
by dmitry
10 Mar 2017, 11:17
Forum: ElmerSolver
Topic: Heat simulation mesh lvl3 cylinder shape issue
Replies: 7
Views: 906

Re: Heat simulation mesh lvl3 cylinder shape issue

laileng wrote:Hi dmitry,

I wish to upload the attachment here, but the mesh file size has exceeds the maximum allowed upload size.
Is there any ways for me to send you the file?
Thank you.

Regards,
laileng
You can simply apload your case to some cloud like Dropbox or something else and share the URL/
by dmitry
10 Mar 2017, 09:23
Forum: ElmerSolver
Topic: Heat simulation mesh lvl3 cylinder shape issue
Replies: 7
Views: 906

Re: Heat simulation mesh lvl3 cylinder shape issue

Hi!
I guess, in order to help you, we need the SIF file and the mesh, you used.
by dmitry
30 Dec 2016, 08:26
Forum: ElmerSolver
Topic: 3-Dimensional Natural Convection
Replies: 4
Views: 1532

Re: 3-Dimensional Natural Convection

Hi!
I just have look at SIF. I don't try to run the case.
One thing, I've spotted is:

Code: Select all

  Variable = Flow Solution[Velocity:2 Pressure:1]
In 3D case it should be

Code: Select all

  Variable = Flow Solution[Velocity:3 Pressure:1]
in order to initialize three components of Velocity vector.
Good luck! ;)
by dmitry
21 Oct 2016, 23:36
Forum: ElmerSolver
Topic: Failed convergence tolerances
Replies: 9
Views: 2178

Re: Failed convergence tolerances

Yor're welcome Anil ;) In addition to previous post I'd like to share transient version of sif. Quite funny results obtained. First the flow moves forward and symmetrically. I thought previous steady simulation is wrong... But after thinking some time the flow decides where to go. With different set...