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1
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1answer
24 views

Suitable method for simulation of in-fiber interferometer

I am trying to simulate an optic-fiber sensor (in-fiber interferometer) to study its respond to temperature. The method I am using is finite-difference time-domain (FDTD), and I come out with a large ...
1
vote
0answers
36 views

Representing a 3D system in 2D (Electromagnetic modelling)

Ok so I'm a complete beginner in computational modelling (I use analytical methods of physics typically) but I would like to model an anisotropic, aperiodic (but not random) finite array of metallic ...
3
votes
0answers
30 views

Data analysis of a magnetic hysteresis loop

I am a physics undergrad and I have MOKE data for a magnetic material (thin permalloy film on a silicon substrate). Here is one of the hysteresis loops I obtained, plotted using Python: The form of ...
0
votes
2answers
108 views

Plot vector field in matlab

I have the function of an electric dipole expressed in cartesian coordinates and I want to create the vector field using Matlab . The function is $$E_z= \frac{p}{4\pi\epsilon_0} \cdot \left(\...
1
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0answers
26 views

Calculating tangential electric field intensity on the boundary

I have an object with surface charge $\sigma$ for which I want to caclulate tangential electric field which would correspond to mathematical formulation: $$ \vec{E}(\vec{x}) = \nabla_x \int \frac{\...
2
votes
1answer
117 views

I need to scale variables to solve a 2D PDE. What are the physical considerations of scaling?

I am solving a boundary value problem in 2D via an implicit finite difference scheme. Unfortunately, although the problem is well-posed and should have a unique solution, the condition number of the ...
3
votes
1answer
181 views

Finite Difference Beam Propagation Method problem

I am trying to implement the finite difference beam propagation method to study the propagation of a TE light signal through a waveguide. However, my solutions are exponentially growing, and display ...
5
votes
1answer
155 views

H(curl) conforming Nédélec-Elements to satisfy div(B)=0

Most authors are very clear that it's very dangerous to just use $\mathrm{H}(curl)$ conforming edge elements, which are divergence free, to satisfy $\mathrm{div}(\mathbf{B})=0$ and implement this ...
2
votes
2answers
299 views

How to solve a Poisson equation using the finite difference method when there is an object inside a domain?

I'm interested in solving an electrostatics problem in 2d case in some domain with a conductor placed inside the domain. From a mathematical point of view, I have to solve a Poisson equation with ...
0
votes
0answers
23 views

Looking for name of mapping procedure

I have been searching for a technique that I used 20 years ago, but for the life of me, I cannot remember the name. It is used in visualizations of pressure, temperature, electromagnetic fields etc. ...
1
vote
2answers
144 views

Which type of meshing is more suited for simulation of electromagnetic metamaterial unit cells?

Electromagnetic metamaterials are resonant, periodic structures (repetition of a unit cell) involving both dielectric and conducting elements, and are used and simulated in frequency ranges from ...
3
votes
2answers
438 views

Tool for computing electric field on a 3d surface

I'm looking for software recommendations for an electrostatic simulation: I have a 3d object of uniform, high conductivity, separated from its environment by a high-resistance skin. Inside that ...
0
votes
0answers
587 views

Free HFSS alternative to create geometry using python

I am using a python script to create wirebond interfaces in Ansys HFSS. Variables define the board, wirebond, and package geometry. To simulate a new wirebond, I just edit the geometry variables and ...
1
vote
0answers
114 views

How can simulation be fast when Electric Field is being measured with probe in CST Microwave Studio? [closed]

I am measuring the electric field in the closure box with aperture and using probe to achieve that. But I have a problem. When I use the probe for measurement, results are not accurate in transient ...
0
votes
1answer
61 views

How can I apply a rib symmetry in a waveguide mode solver in Fortran? [closed]

How do I apply symmetry rib in a waveguide mode solver using the finite element method in Fortran?
8
votes
2answers
2k views

simple MHD simulation code for (self) education and play with

I would like some super simple computational code for solving magnetohydrodynamics problems. High accuracy nor performance is not my concern. I wan't it just to visually explore qualitative behavior ...
2
votes
2answers
823 views

How can I calculate numerically an electrical potential distribution from an electric field distribution?

I want to calculate the unknown electrical potential distribution $\phi(x)$ (notice this is a function of $x$) from a known electric field distribution $\boldsymbol{E}(x)$ using the Poisson equation, ...
5
votes
1answer
4k views

How to generate sloped streamslice plot of magnetic field in Matlab

I am currently working on my bachelor thesis, where I am calculating trajectory of electrons and ions in Hall Effect Ion Thruster. However, to be sure what I am calculating, I need to know how does ...
4
votes
2answers
289 views

Numerical simulation of particle in magnetic field

I'm interesting in numerically simulating (with my own code, not an off-the-shelf package) the motion of a single electrically charged particle in a magnetic field. The field will vary in time and ...
2
votes
4answers
1k views

Magnetic field visualization on Mac OS X?

Does somebody know about any tool for simulation and visualization of magnetic fields either of permanent magnets or solenoids, that can be used on Mac OS X? Maybe there is some software for Linux, ...
2
votes
3answers
1k views

Scalar vs. vector potential for magnetostatics

When trying to solve a magneto-static boundary-value problem (BVP) ($\nabla \times \mathbf{H} = \mathbf{J}$ and $\nabla \cdot \mathbf{B} = 0$), one can use either the magnetic vector potential $\...
2
votes
0answers
2k views

COMSOL - Implementing Perfectly Matched Layers (3D)

If there are any COMSOL gurus here, I want to simulate a 3D RF system infinite in 1 direction. I realize I need to use PML's, but am unsure how to configure them. it seems that simply scaling them by ...
6
votes
2answers
302 views

Tools for computing an electric field based on location of charges?

I have the positions of a large number of charges (the strengths are known, but are also variables). Are there any tools that will allow me to visualize the electric field induced by these charges (or ...