Page 243 - Modelling in Transport Phenomena A Conceptual Approach
P. 243
PROBLEMS 223
‘pable 7.1 Time required to empty tanks of different geometries.
TB
Time
Geometry
2
6 - 9 4
L [D3i2 - (D - h)3/2]
3 COAO
b) Substitute Eq. (4) into Eq. (1) to obtain the engineering Bernoulli equation
(or, macroscopic mechanical energy equation) for an incompressible fluid as
+
-- (5)
A‘
+ 9 Ah + & - Ws = 0
P 2
c) To estimate the friction loss for flow in a pipe, consider steady flow of an in-
compressible fluid in a horizontal pipe of circular cross-section. Simplify Eq. (5)
