Search found 173 matches
- Fri 07 Feb 2020, 08:39
- Forum: Feedback
- Topic: bug in InitFDTD 'MaxTime'
- Replies: 5
- Views: 4881
Re: bug in InitFDTD 'MaxTime'
No, Thorsten, it does not work. Not always. And I don't know why. I set the stoptime at 1e-7 and see how it runs beyond 1.5e-7. Sometimes it stops, sometimes not. WHy do I do this? I excite a resonator with feeding strips and lumped port, a port load is at the other side. It is inside MUR box. T\Whe...
- Thu 06 Feb 2020, 04:14
- Forum: Usage
- Topic: Unexpected result after irradiating a PEC plate
- Replies: 3
- Views: 2894
Re: Unexpected result after irradiating a PEC plate
I've been making scattering simulations, with a help from Thorsten, including irradiation of weird surfaces. It was a time ago, so I don't remember details, but it works like this: when is the the wave called "plane"? only when d/x=d/dy=0, where propagation is along z. Is it possible if we place a s...
- Thu 06 Feb 2020, 01:47
- Forum: Development
- Topic: Time data in vtk dumps
- Replies: 2
- Views: 3901
Time data in vtk dumps
Dear Thorsten,
Can you implement TimeValue (at least optional) field in vtr dumps for ParaView showing the propagation time? Maybe setting time-scale like "0"(integer steps),"1e-6", "1e-9" would be useful?
Can you implement TimeValue (at least optional) field in vtr dumps for ParaView showing the propagation time? Maybe setting time-scale like "0"(integer steps),"1e-6", "1e-9" would be useful?
- Wed 05 Feb 2020, 06:42
- Forum: Usage
- Topic: The problem with leaky resonator characteristic modes? How?
- Replies: 0
- Views: 4486
The problem with leaky resonator characteristic modes? How?
It is known that FDTD is hard to analyze closed cavities where the signal does not decay well. But there is an opposite problem. Lets consider a resonator with PEC on the top and bottom, but PMC on the sides! When loaded with 2 perfectly matched ports, it works more or less as a filter (if there is ...
- Mon 03 Feb 2020, 02:23
- Forum: Usage
- Topic: Excitation of a resonator in polar coordinates.
- Replies: 2
- Views: 2413
Re: Excitation of a resonator in polar coordinates.
the field. The sourceit is broken into two dipoles. it leaks in the center, giving preference to wrong modes. I was wondering, if there is a right way of exciting the field uniformly along the diameter line? But looks like no. at the moment I am changing the mesh generator script to rectangular coor...
- Mon 03 Feb 2020, 02:19
- Forum: Feedback
- Topic: bug in InitFDTD 'MaxTime'
- Replies: 5
- Views: 4881
Re: bug in InitFDTD 'MaxTime'

really, that should be long. can I ask for additional stop condition in future version if you plan do publish such? Since the real time monitor is already implemented it looks like a natural feature.
- Fri 31 Jan 2020, 04:01
- Forum: Feedback
- Topic: bug in InitFDTD 'MaxTime'
- Replies: 5
- Views: 4881
bug in InitFDTD 'MaxTime'
I use FDTD = InitFDTD('CoordSystem', 1,'MultiGrid',conf.r/2, 'MaxTime', (60*60*10)); for calculating during 10 hours, each made up of 60 minutes, each made up of 60 seconds. However, the simulation does not stop after 15+ hours. In the help it is written that 'MaxTime' is a "real" time of simulation...
- Fri 31 Jan 2020, 02:54
- Forum: Usage
- Topic: Excitation of a resonator in polar coordinates.
- Replies: 2
- Views: 2413
Excitation of a resonator in polar coordinates.
I am trying to simulate a resonator excited by a magnetic loop. Since I am interested more in fundamental modes, and do not know the impedance yet, I place a magnetic probe inside (see the wedges in the picture) instead of wrappint the loop around. Taking one probe was not possible, because it creat...
- Wed 16 Oct 2019, 02:17
- Forum: Feedback
- Topic: from openems to paraview
- Replies: 1
- Views: 4448
Re: from openems to paraview
I am confused about what are you trying to reach, and can only guess what is "rheumatic distribution". ParaView is neither simulator nor editor. It just visualizes data, and it is neither stabile nor fast in this; vith fundamental limitations making time-mapped evolution data very hard and indirect ...
- Wed 23 Jan 2019, 00:53
- Forum: Usage
- Topic: FDTD Computation Time Estimation
- Replies: 2
- Views: 2948
Re: FDTD Computation Time Estimation
it is hard because you don't know how the wave would propagate and where...
For sure you only know the time of excitation.
But you can check the evolution in ParaView during simulation and estimate using your expectations and path passed... i.e. "use the force, Luke"...
For sure you only know the time of excitation.
But you can check the evolution in ParaView during simulation and estimate using your expectations and path passed... i.e. "use the force, Luke"...