In this video, you will learn how you can transfer your simulation over to ANSYS fluent, to do in depth analysis of your simulation in our flagship product. To transfer Discovery data to another Ansys application, select the Transfer menu in the ribbon of the Simulation tab, choose fluent. Fluent will be launched with .cas.h5 files. Export to Fluent is disabled for Fluid simulations that contain faceted bodies. You can also transfer your data without launching Fluent. Select Save As from the File menu and specify a file type. Select Fluent CAS File to save as .cas.h5 file.

Please refer to this for further considerations before transferring: Considerations before transferring the file to flagship products