Search found 1438 matches

by thorsten
Sun 13 Sep 2020, 20:09
Forum: Usage
Topic: No output when running simulation
Replies: 6
Views: 5713

Re: No output when running simulation

The cause is this change:
https://github.com/thliebig/openEMS/com ... 6b9a7d17fc

I think we have to revert it...
Thanks for the feedback.
regards
Thorsten
by thorsten
Sun 13 Sep 2020, 19:54
Forum: Usage
Topic: High level FDTD question
Replies: 2
Views: 2126

Re: High level FDTD question

Hi Dom, I'm sure I have answered this before but I cannot find it ;) The displayed energy is only a rough/ fast estimate. It for example completely neglects the material distribution (aka assumes everything to be vacuum or metal). During the excitation the energy in-flow is not constant and some dec...
by thorsten
Tue 01 Sep 2020, 21:45
Forum: Usage
Topic: imaginary part of feed.R
Replies: 1
Views: 1807

Re: imaginary part of feed.R

Hi, the FDTD method is a time domain method (TD). Thus it does not have any concept of complex numbers or values. Only after you convert data from time domain into frequency domain (via FFT or DFT) during post-processing you have complex values. Thus you cannot use complex values for anything or any...
by thorsten
Tue 01 Sep 2020, 21:42
Forum: Usage
Topic: Time step (or sampling frequency) of the field dumps
Replies: 2
Views: 1996

Re: Time step (or sampling frequency) of the field dumps

I assume you mean the hdf5 field dumps? The openEMS read functions contain a TD signal with the exact timesteps that were saved. This is of course very important if you want to transform from TD to FD. Have a close look here: https://github.com/thliebig/openEMS/blob/master/matlab/ReadHDF5FieldData.m...
by thorsten
Tue 01 Sep 2020, 21:38
Forum: Usage
Topic: simulation never finishes. fields seem frozen?
Replies: 2
Views: 2236

Re: simulation never finishes. fields seem frozen?

Energy that continuously increases usually means that the PML have gone unstable. The PML are usually the only element that is not inherently stable.
You may try to move them further away and/or make sure the mesh inside of them is homogeneous and in good shape.
by thorsten
Sun 26 Jul 2020, 14:59
Forum: Install
Topic: TinyXML becomes a big problem
Replies: 12
Views: 11598

Re: TinyXML becomes a big problem

Well yeah, Octave from snap won't work I guess.

I have updated the readme on github, let me know if this are really all required packages...

regards
Thorsten
by thorsten
Fri 24 Jul 2020, 16:31
Forum: Install
Topic: TinyXML becomes a big problem
Replies: 12
Views: 11598

Re: TinyXML becomes a big problem

I'm not sure what you are doing but the packages seem to be wrong! On Ubuntu 18.04 it should be sudo apt-get install build-essential cmake git libhdf5-dev libvtk7-dev libboost-all-dev libcgal-dev libtinyxml-dev qtbase5-dev libvtk7-qt-dev I hope I did not miss any important package... regards Thorsten
by thorsten
Mon 20 Jul 2020, 23:44
Forum: Install
Topic: TinyXML becomes a big problem
Replies: 12
Views: 11598

Re: TinyXML becomes a big problem

Hm, no openEMS can use any vtk version. I use 8.2 here. Try Qt5 packages and the latest vtk. It should work fine. I really have to update the required packages for a later Ubuntu. The problem is that I do not use Ubuntu anymore and thus I'm not really up to date and what packages should be used. reg...
by thorsten
Mon 20 Jul 2020, 23:17
Forum: Install
Topic: TinyXML becomes a big problem
Replies: 12
Views: 11598

Re: TinyXML becomes a big problem

Hm, I never had any issues with tiny_xml so far, even on cutting edge distros like Manjaro...
I will have a closer look...
by thorsten
Wed 08 Jul 2020, 20:35
Forum: Usage
Topic: Licensing
Replies: 1
Views: 2566

Re: Licensing

Hi, openEMS is licensed under the GPL . More infos here . But this license only applies to the software itself. Only if you want to include openEMS (the software) into your own software product you have to oblige to the GPL license. Any output, data, idea or results obtained with openEMS, is your ow...