Questions tagged [electromagnetism]
For questions about modeling phenomena related to electromagnetic fields.
112
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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,
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Open-source 3D FEM Solver for Electromagnetics (Time-Harmonic Maxwell)
I was wondering if there exist any good (accurate/fast/easy-to-use) open-source FEM solvers for 3D time-harmonic Maxwell's equations. I am looking to simulate systems a few wavelengths large in the X/...
- 1,300
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FEniCS: boundary conditions for electrostatic problems with dielectrics
I carefully read all circa 70 pages of FEniCS tutorial and I still do not understand how to solve electrostatic problems when I have materials with different dielectric constant. The self contained ...
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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 ...
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Effective "thickness" of finite-difference material elements
I have a 3D finite-difference formulation (for time-harmonic Maxwell using a standard Yee cell grid.) A "perfect electrical conductor" condition can be implemented by enforcing the desired electric ...
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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 ...
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Magnetic field simulation and 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, ...
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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 $\...
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Different kinds of Integral Equation Methods
I am relatively new to integral equations for solving time-harmonic EM scattering problems. I have read a decent number of papers on the subject, and it seems that for formulations that can support 3D ...
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Defining electric current source excitations for surface integral equation formulations
In a finite difference (FD) based electromagnetic formulation based on a Yee cell grid, one can define electric current source excitations ($J$) on the $E$ field grid points. At a distance, the fields ...
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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 ...
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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 ...
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