Ansys Fluent: Helical Savonius Wind Turbine Using Dynamic Mesh. 

⚠️ God has said in the Quran: 🔴 { O mankind, worship your Lord, who created you and those before you, that you may become righteous - ( 2:21 )} 📖Quran

Have you got clarification about this?

I'll admit I'm not quite sure why that is important to do, but I've checked that if you skip that step the fluid on the interior zone won't move.

@@fluentsetup1232 Interesting.

have you figured it out sir?

It is simple math. Basically the function works the following way: You wan´t the velocity of the wind to be 8 m/s, but to have a smooth ramping, you can just use tis function. The velocity starts at 0 and with increasing time, the velocity reaches the desired 8 m/s. You can write that on paper and place random values for the time variable. You can see, that at 0 seconds the velocity is 0 and at some high value, like 30 seconds, the value is 8 m/s.

Please reply if you got the answer.

Define maximum veleocity im turbine walls, then delete the maximum velocity to turbine radius. Then multiply this to 60 then you will get rpm.

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-t7EP56BvrJM.html . That's a video from CFD Ninja explaining how, it shows how to import the file from inventor, but it should be basically the same for any other cad software.

save your cad file by clicking save as STEP214 format. open design modeller in ansys and find the STEP214 file and click generate