[Birnensuppe]

Hey,
I would like to simulate an electric Arc with CFX.
I am using Ansys 16.2 with beta features activated.
Based on my simulation results I have the presumption that CFX calculates the Lorentz force not correctly. So I created a test file to check my guess.
The structure is a simple copper cable. One end is defined as inlet with a flux in of 1 A/m^2, the opposite end is on ground level. Every surface is implemented as a wall. The cylinder wall is defined with zero flux. Furthermore, an external magnetic field of 1 T is imposed.
I expect an electron shift caused by the Lorentz force and a hall voltage.
If I simulate a steady state or a transient simulation, the results always show a homogeneous current density and no hall voltage.
That is the first problem.



The second problem is, if I check the results and visualize the current density with a surface and rotate the structure wildly, I can see an electron shift as long as I hold the left mouse key to rotate the object. The object can stand still, but I need to push the mouse key. If I don’t hold the mouse key anymore, so that the object is static, the current density is homogeneous again. That is the second problem.


Please check the attached pictures of the homogeneous and in homogeneous current density.

Has anybody perhaps an idea how to solve these problems?

Thank in advance for your response



Best Greetings
Lukas