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# Re: [femm] FEMM "batch processing"

- To: <femm@yahoogroups.com>
- Subject: Re: [femm] FEMM "batch processing"
- From: "Graham Gunderson" <infinitenergy@hotmail.com>
- Date: Tue, 24 Apr 2001 13:25:19 -0700
- References: <9c4i5a+s9rs@eGroups.com>

Hi, I've run into the same thing, kind of. Recently, I've been using FEMM to make animations. For each frame (in this example), I have to adjust the angular offset of magnetization to simulate rotating magnets and moving fields. To get a smooth animation, I have to use at least 16 frames; with nonlinear materials the crunch time is about a day, and it must be tended to manually. (16 frames is still pretty chunky; 36 or 72 frames would be awesome but I do not have the time or patience to mess around with it) Isn't it possible to invent a "shell" for FEMM, which will iteratively run fkern, each time after changing some variable(s) in the model? Then, the changing parameters could be selected from a list of all properties (frequency, materials, magnetization direction, point coordinates, you name it) and the progression of values given either by a list (100, 200, 300...) or a parsed formula (i.e., x = x + 100). This is one suggestion out of many ways it can be done. I feel this would save a lot of time, for problems that depend on multiple solutions. A colleague of mine did a moving simulation in FEMM using something like 180 frames - and he did that all by hand.This is a lot of babysitting, when you have to solve each frame individually (or in batches of a few, with a couple windows open, each running FKERN... but this "divided attention" multitasking is SLOWER, overall, and crashes too often.) If I knew C++ I might try making an iterative shell of my own... it seems like it would not be so hard to do. I don't know C, though, and have no spare time to learn it now. (I barely have the spare time to manually iterate the simulations!) Regards, Graham ----- Original Message ----- From: frank.e.lenning@boeing.com To: femm@yahoogroups.com Sent: Tuesday, April 24, 2001 11:54 AM Subject: [femm] FEMM "batch processing" `Is there a way to "batch process" multiple frequenciesin FEMM? I've been doing simple lightning (F domain) current distribution problems in FEMM but I have to laboriously increment through the frequencies to build a broadband result. (BTW, it works great!) Iam interested in getting some quantity (say integral of Ht around a loop) as a function of frequency. Any help? I suppose it is possible to do by modifying the code but that sounds painful with no prior experience with this code and limited C++ programming experience.` `Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.`

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  - Re: [femm] FEMM "batch processing"
    - From: Dave Squires <djsquires@plix.com>
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    - From: Petr Krc <pekr@magneton.cz>

- References:
  - FEMM "batch processing"
    - From: frank.e.lenning@boeing.com

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