Young

I received some guidance from user21 but now there is another issue. mathematica.stackexchange.com/questions/285802/…

Is anyone experienced with Solid Mechanics in Mathematica? I have a fairly basic question about material parameters. I need to specify two different compliance matrices. A hint would be great.

Happy New Years Everyone!

@user21 Do you have an example of using FEA to calculate the magnetic field (or potential field) of a solenoid?

Hi @Edmund: I did see that but it focuses on an analytic solution and I was looking for a numerical method to include non-linear ferromagnetic materials

Has anyone used NDSolve and FiniteElements to solve Magnetostatic problems with solenoid coils and ferromagnetic materials?

@halirutan Thanks ... I figured it out

I'm try to produce a streamplot of an electric field (the electric field potential is calculated using ndsolve then the grad of the interpolation function). A contourplot of the electric potential is correct and one of the electric field is plausible, but a vector or stream plot is returned empty. Any guesses what I'm doing wrong?

Using AccuracyGoal->[one order of magnitude smaller than MaxCellMeasure] and MeshQualityGoal -> 1 helps (both not required in V10.4) but it's still not great

I find when I perform a RegionDifference on two ImplicitRegions with small dimensions (0.01) then use ToElementMesh the resulting mesh is terrible in V11.1 but perfect in V10.4

@user21 what do I need to do in order to make V11.1 generate a mesh with the same quality as V10.4?

@JasonB Do you think Wolfram would provide a Raspberry Pi license unlocked for more than 16 kernels?

@Karsten7. "BenchmarkResult"->0.245, mathematica.stackexchange.com/a/124097/41016

@JasonB My daughter thinks the Pi is cool and she enjoyed setting it up with me ... I've done a couple of projects with her using the GPIO of the Pi ... I don't think it would outperform a carefully selected low end PC.

@JasonB @Karsten7.

I was planning on running a Parallelize[Benchmark[]] tonight

As far as speed it seems to be about 1/2 the speed as my Quad Core Laptop w/ 8GB RAM running my own notebooks

I spent $290 and can post a full BOM if you're interested (money could be saved if simple stand-offs were used to mount the boards) ... The only special code for Mathematica came from here: mathematica.stackexchange.com/questions/123442/…

16 Kernel Raspberry Pi 3 Cluster

@bbgodfrey I'm interested in creating a 2D electromagnetic PIC simulation for a high temperature plasma (30keV) ... do you know of any open source Mathematica codes that would be a good starting point?

@MichaelE2 That doesn't seem to remove them from the Kernel Configuration Options window

Is there a command I can evaluate in the front end to remove a kernel ... when I try to do this through the Kernel Configuration Options window it freezes (Pi3 V10.3)

The entire notebook is only 18MB

I used DumpSave for a 2D Interpolation Function created by NDSolve and the file is 35MB ... Does that make sense?

@MichaelHale Cool!

Happy New Year

in my post

just like the image shows

My code would give you a curve for tau=0.5 and tau=1.5

The question has been deleted

You can use the previous version and just define the range of m and p as j ... then change j to 1, 2, etc

I'm not sure I completely follow, maybe it's best to write it out as a question for the forum

or on SE and I'll work on it

you can post your question here

sure

thanks for the link

bye

I need to go now

No problem

MaxRecursion is 15 for NIntegrate and 0 for the Plot

takes 43.8051 seconds on my machine

use PlotPoints -> 80, MaxRecursion -> 0 in Plot

oh and use Method -> "LocalAdaptive", MaxRecursion -> 15 in the NIntegrate

You could probably delete your comments on the answer ... just to clean things up ... it's up to you

no problem ... glad to help

gamma tau calls integraldelta instead of integralgamma