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If the velocity gradient of a fluid is 24000 sec-1, force required to move a fluid between plate is 3 N/m2, what will be the fluid viscosity between the plates?

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HPCL Engineer Civil 23 Dec 2023 Official Paper
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Concept:

The viscosity of a fluid can be calculated using Newton's law of viscosity:

Calculation:

Given:

  • Velocity gradient, dudy=24000sec−1dudy=24000sec−1
  • Shear stress, τ=3N/m2τ=3N/m2

The viscosity is given by:

Substitute the given values:

The fluid viscosity between the plates is 1.25×10−4N⋅s/m21.25×10−4N⋅s/m2

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