Atharv Joshi
Forum Moderator

Hi Mehmet, 

Yes, you can select multiple inlets surfaces and apply a single input. Press Ctrl key while manually selecting multiple faces or use Power Selection. 

Please check that you are selecting correct faces for applying the inlet condition. You can right click hide the other geometries to easily select faces. 

Check out the fluids courses to learn about Fluid Simulation in Ansys Discovery: Fluid Flow Simulation Using Ansys Discovery | Ansys Courses

Thanks and Regards
AtharvÂ