setting up reduced frequency in fluent

zagros135 · September 17, 2022, 10:02

hi every one.

excuseme i want to simulate an oscillating airfoil with length 10 cm, velocity=7 m/s and the reduced frequency = 0.1, but i can't calculate the angular velacity (omega-W).

and i don't know what's the difference between frequenc in angular velocity(w=2*pi*f) and reduced frequency.

thank you.

LuckyTran · September 18, 2022, 03:58

Reduced frequency is the normalized, non-dimensional frequency. Take your reduce frequency, multiply by velocity, and divide by the length scale and that gives you the angular frequency. Reduced frequency is closely related to the Strouhal number.

September 17, 2022, 10:02	setting up reduced frequency in fluent	#1
zagros135 New Member zagros Join Date: Apr 2022 Posts: 19 Rep Power: 4	hi every one. excuseme i want to simulate an oscillating airfoil with length 10 cm, velocity=7 m/s and the reduced frequency = 0.1, but i can't calculate the angular velacity (omega-W). and i don't know what's the difference between frequenc in angular velocity(w=2pif) and reduced frequency. thank you.

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September 18, 2022, 03:58		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,763 Rep Power: 66	Reduced frequency is the normalized, non-dimensional frequency. Take your reduce frequency, multiply by velocity, and divide by the length scale and that gives you the angular frequency. Reduced frequency is closely related to the Strouhal number.