Learning Forum

[Javier Gutierrez]

Hi everyone!

I am trying to use the MHD module to simulate a cylinder with a known current applied through one of the faces and flowing all the way to the other face.

Since the current density is a parameter that I can manipulate and the only magnetic field in my problem is the one induced by the current, I decided to use the Electric Potential method, but I was not seeing any Lorentz Force nor Magnetic Field being different from zero at the end of the simulations, and since I have read on this post:

Fluent Electrical Potential MHD Module Issues (ansys.com)

that is what you can expect while using the Electric Potential method with a 0-value external magnetic field applied.

Since I am interested on the effects the Lorentz Force due to the current and the induced magnetic field can have on the fluid flow, my question is:

if I switch to the Magnetic Induction method, while preserving the 0-value external magnetic field, how can I specify the current flowing through the boundaries?

I was trying to use a DEFINE_PROFILE UDF and apply it to the zone near the faces but I am not sure that is the correct way to proceed.

Thank you!

[John Ibrahim]

Hello Javier,

To impose an external B0 magnetic filed, you should use Maxwell or HFSS then export the magnetic filed and rad it into fluent.  Otherwise, you can use file format as in the manual to enter the B0 in x, y and z.

Best