[Solved] Recommendation for helical gear contact

It depends what sort of analysis you would like to do. If you want to simulate a single contact between the gears, I would choose static structural.

As for the contact types, to make it more realistic you would definitely need a frictional contact (ps this is one of the hardest in terms of setting up and solution) . If you are new in Ansys workbench maybe starting with nonfrictional contact. You can check the contact type article for more information.

https://www.mechead.com/contact-types-and-behaviours-in-ansys/

Hope these help

what type of gear you want to model? you can solidworks maybe its easier