# Question for COSMOS FLOWORKS Tutorial Charpter 2

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 January 8, 2006, 10:54 Question for COSMOS FLOWORKS Tutorial Charpter 2 #1 OPticdesigner Guest   Posts: n/a Dear Madam or Sir I studied FLoworks (EFD.Lab) tutroial Chapter2 and found one question. How do they specify the Angular Velocity as 100 rad/s for representing swirling factor? I ccheck the parameter for PAPST DC-Axial, Series 400, 405 item. Its RPM is 6000 rpm. Can you show me how to get the Angular Velocity as 100 rad/s? Steve Li

 January 8, 2006, 16:30 Re: Question for COSMOS FLOWORKS Tutorial Charpter #2 Jim_Park Guest   Posts: n/a Strange. 6000 revs/min is 100 revs/sec. 2*pi radians/rev makes 100 revs/sec is about 628.3 rad/sec. Perhaps there's a misprint. Or (unlikely) you've misread the units. Let us know what you learn.

 January 8, 2006, 23:27 Re: Question for COSMOS FLOWORKS Tutorial Charpter #3 OPticdesigner Guest   Posts: n/a HI,Jim Thanks for your instroduction. I tried to use Floworks to model the EBMPAPST DC-AXIAL Fan Series 400, 405 item. It is alos showed on the Floworks Tutorial Chapter 2. 1. Select the 405 item under the Fan Curves, EFD.Pro Defined, PAPST, DC-Axial, Series 400, 405 item. 2. Expand the Flow parameters item and select Swirl in the Flow vectors direction list. 3. Specify the Angular velocity as 100 rad/s and accept the zero Radial velocity value. The descriptions listed above are on the tutorial. I do not understand how he get the 100 rad/s to represent the DC-Axial Fan. The rpm for EBMPAPST DC-AXIAL Fan Series 400, 405 item is 6000.

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