# Tutorial how to do a flow simulation to a rotating propeller?

These are the steps to do a flow analysis...

1. ### Step 1:

First af all we pick a part that will be rotated... (i am using a part that i have designed)

2. ### Step 2:

then we go to a plane, and we create a cylinder that contains the part we want to rotate...

3. ### Step 3:

And we extrude it WITHOUT merging result... This is the volume that will be rotated...

4. ### Step 4:

then we click change transparency in order to see our part in it...

5. ### Step 5:

Next we enable the flow simulation command in Tools->Add-ins->Flow simulation... Click ok

6. ### Step 6:

then we open the flow simulation menu

7. ### Step 7:

We click on wizard in order to create a new study....

8. ### Step 8:

we click on the arrows on the right side and click on analysis type... this type indicates that we are not going to give fluid boundaries (speed pressure etc) but we are gonna calculate them...

9. ### Step 9:

We choose external flow and we check both boxes on the right side... we click on the rotation analysis... (our propeller will be rotating)

10. ### Step 10:

Our fluid is going to be water...

next..

next...

13. ### Step 13:

Finish... (if you want, you can adjust the resolution number on the top depending on the cpu you have)

14. ### Step 14:

Next we edit the computational domain... (This depends on the cpu you have... if you have a powerfull pc, you can leave it at max.... but if you don;t want to wait for a lifetime, you can reduce it...)

15. ### Step 15:

this is how i adjusted it....

16. ### Step 16:

then we choose rotating regions...

17. ### Step 17:

we click on the extrude body.. NOT the propeller..

RUN..

19. ### Step 19:

we wait till the solver is finished...

20. ### Step 20:

Then we go to flow trajectories...right click, insert

21. ### Step 21:

We select the surfaces that are in contact with the fluid and we set the number of the particles used... (Again this is up to you cpu speed.. My i7 tuned to 2.9ghz took about 4-5 minutes to do a 200 particles calculation)

22. ### Step 22:

Wait till the solver is finished...

done....:)