Instead, we will just assume that a device exists that provides a constant voltage, or a constant current.
#Particle tracing module comsol 5.3 how to
We are interested in learning how to model this magnetic field and how it interacts with other objects.įor the purpose of learning coil modeling, we won’t concern ourselves with exactly what is happening within the source itself. This is a vector field, having both a magnitude and direction, and can be computed from Ampère’s law. This problem can be solved using the finite element method as implemented in the AC/DC Module in COMSOL Multiphysics.Īs a consequence of the computed current flow, a magnetic field arises and surrounds the wire. Current cannot flow in or out of the wire anywhere else, so the electric insulation condition is applicable on the remaining boundaries. The magnitude and direction of this current throughout the conductor can be computed from Ohm’s law and the Charge conservation equation, along with a set of boundary conditions.Ī very simple electromagnetic coil connected to a DC voltage source.įor this single wire, we can consider a grounded boundary condition at one end, meaning an electric potential of zero, and a higher electric potential on the other end. Due to the voltage difference, a current will flow through the wire. Let’s start with a simple example of a conductive wire that is bent into a loop and connected to a constant voltage source, a battery (shown below). How to Model a Basic Coil in COMSOL Multiphysics If your work involves modeling coils, you will need a complete understanding of this topic. Today, we will look into one of the key concepts to keep in mind when modeling coils: closing the current loop.
![particle tracing module comsol 5.3 particle tracing module comsol 5.3](https://www.addlink.es/images/stories/virtuemart/product/particle_main_550x450.png)
![particle tracing module comsol 5.3 particle tracing module comsol 5.3](https://cdn.comsol.com/wordpress/2016/07/particle-trajectories.png)
One of the most common uses of the AC/DC Module is for modeling electromagnetic coils and the interactions with their surroundings.