<Dl> <Dd> u (0) = 0, u (h) = 0 (\ displaystyle u (0) = 0, \ quad u (h) = 0) </Dd> </Dl> <Dd> u (0) = 0, u (h) = 0 (\ displaystyle u (0) = 0, \ quad u (h) = 0) </Dd> <P> Therefore, the velocity distribution and the volume flow rate per unit length are </P> <Dl> <Dd> u (y) = G 2 μ y (h − y), Q = G h 3 12 μ . (\ displaystyle u (y) = (\ frac (G) (2 \ mu)) y (h-y), \ quad Q = (\ frac (Gh ^ (3)) (12 \ mu)).) </Dd> </Dl>

When a liquid is flowing through a pipe the shear force