Under conditions of turbulent flow, what is the driving pressure?
a. Proportional to the square of the flow
b. Inversely proportional to the flow
c. Linearly proportional to the flow
d. Inversely proportional to the density
ANS: A
This changeover from laminar to turbulent flow depends on several factors, including fluid den-sity (d), viscosity (h), linear velocity (v), and tube radius (r). In combination, these factors deter-mine Reynold's number (NR):
NR = v ? d ? 2r/h
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