electrostatic force with UDF

Jinfeng

I am modeling the air flow which is driven by the ionic wind.

I want to include an electrical body force into the Momentum equations to solve the flow field. I already have the electrical field results (voltage and space charge density) in the format of notepad files. How do I use UDF to do this? Do I need to use "DEFINE_SOURCE" to add a source term on each momentum euqation (x, y and z)? Or how should I do it? How do I read a .txt file into Fluent?

Any help or suggestion would be greatly apprecited! Thanks.