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Old Feb 25th 2016, 09:00 AM   #1
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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
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Old Feb 25th 2016, 09:40 AM   #2
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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.
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Old Feb 26th 2016, 11:48 AM   #3
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Originally Posted by ChipB View Post
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
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