Question
In deriving Bernoulli’s equation, we equated the work done on the fluid in the tube to its change in the potential and kinetic energy. (a) What is the largest average velocity of blood flow in an artery of diameter 2 × 10–3 m if the flow must remain laminar? (b) Do the dissipative forces become more important as the fluid velocity increases? Discuss qualitatively.
Solution
(a) If dissipative forces are present, then due to pressure difference spent against the dissipative forces, some forces in liquid flow. Therefore, the pressure drop becomes large.
(b) The dissipative forces become more important with increasing flow velocity, because of turbulence.
(b) The dissipative forces become more important with increasing flow velocity, because of turbulence.
