The fluid velocity varies as the cube of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop for ____________ fluid?
Correct answer: B. Pseudo-plastic
- A. Newtonian
- B. Pseudo-plastic
- C. Dilatent
- D. Bingham plastic
Explanation
For a power-law fluid, average velocity varies as D^(1+1/n); a cubic dependence occurs for a shear-thinning, or pseudoplastic, fluid when n is about 0.5. Newtonian flow instead gives velocity proportional to D².
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