Discuss the below:
Q: When a valve is opened, fluid flows in the expansion duct of Fig. according to the approximation
v = iU (1-x/2L) tanh Ut/L
Find
(a) the fluid acceleration at (x, t) = (L, L/U) and
(b) the time for which the fluid acceleration at x = L is zero. Why does the fluid acceleration become negative after condition (b)?