Physics Help Forum How to determine shear rate in rotating plate?

 Feb 25th 2016, 09:00 AM #1 Junior Member   Join Date: Jan 2016 Posts: 4 How to determine shear rate in rotating plate? Hello, I was wondering how to determine shear rate in rotating plate as below. I believe the plate length (L) and height (H) should have influence on the magnitude of shear rate. What would be relationship between shear rate and plate length/height? Is there any publication about that? Thank you very much for your valuable time. Best regards, Koohee Attached Thumbnails
 Feb 25th 2016, 09:40 AM #2 Physics Team     Join Date: Jun 2010 Location: Naperville, IL USA Posts: 2,268 Please be more specific - what do you mean by "shear rate?" It look like you are asking about a thin plate rotating about one end. The tensile stresses would be pretty easy to calculate, and would depend on the material density, overall length, and rotational speed. The stress would be greatest at the axis of rotation and decrease to zero at the free end. I can provide more detail o how to calculate the tensile stress, but first please verify this is what you are looking for.
Feb 26th 2016, 11:48 AM   #3
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Join Date: Jan 2016
Posts: 4
 Originally Posted by ChipB Please be more specific - what do you mean by "shear rate?" It look like you are asking about a thin plate rotating about one end. The tensile stresses would be pretty easy to calculate, and would depend on the material density, overall length, and rotational speed. The stress would be greatest at the axis of rotation and decrease to zero at the free end. I can provide more detail o how to calculate the tensile stress, but first please verify this is what you are looking for.

Dear ChipB,

Thank you very much for your response.

To be more specific, the rotating plate is immersed in a fluid. I wanted to know the shear rate of the "fluid" along the plate surface due to the rotating plate. I believe the plate length (L) should have influence on the magnitude of shear rate (if we assume the system as 2D; longer plate, higher shear rate?).

Thank you very much for your valuable time.

Best regards

 Tags determine, plate, rate, rotating, shear

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