A shear thinning fluid is pumped along a pipe. The flow is fully developed and t

Question

A shear thinning fluid is pumped along a pipe. The flow is fully developed and turbulent. Which of the following is false: Select one: O a. At high shear rates the pressure drop would be less if a Newtonian fluid with the same apparent viscosity and density were used o b. At high and low shear rates the apparent viscosity will be approximately constant O c. At the same value of generalised Reynolds number the friction factor would be greater for a Newtonian fluid d. At the same value of generalised Reynolds number the friction factor would be greater for a shear-thickening fluid

Explanation / Answer

option b) is false because for shear thinning fluids the viscosity decreases with increase in shear stresses, hence at low shear rates viscosity will be high and vice-versa.

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