Apparent viscosity for Non- Newtonian fluid is ____________(a) Constant(b) Depends on the shear stress(c) Depends on the shear rate(d) DynamicThe question was posed to me in an international level competition.This is a very interesting question from Non Newtonian Fluids topic in portion Fluid Flow and Mixing of Bioprocess Engineering

Apparent viscosity for Non- Newtonian fluid is ____________(a) Constan

1.	Apparent viscosity for Non- Newtonian fluid is ____________(a) Constant(b) Depends on the shear stress(c) Depends on the shear rate(d) DynamicThe question was posed to me in an international level competition.This is a very interesting question from Non Newtonian Fluids topic in portion Fluid Flow and Mixing of Bioprocess Engineering
Answer» The CORRECT choice is (c) Depends on the shear rate Explanation: APPARENT VISCOSITY (sometimes denoted η) is the shear stress applied to a FLUID divided by the shear rate. For a Newtonian fluid, the apparent viscosity is constant, and equal to the Newtonian viscosity of the fluid, but for non-Newtonian fluids, the apparent viscosity depends on the shear rate. In such case, the ratio between shear stress and shear rate is not constant; NEVERTHELESS, this ratio for non- Newtonian fluids.

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