I am using Fluent Workbench. I'm not familiar with the definition of the motion of mesh zones with UDF. For my initial runs, i used a .PROF file to define the motion of the plate. Can you recommend me ressources that i can explore to parameterize the input and write the UDF, please? Does it need the use of the designpoints or how does the automation work with your parameterization and UDF idea? 
In my pre-processing step, i define (manually) the distance between the plates in my model and run the mesh before updating that to fluent. But i want also to include the plates distance in my automation.