Fluid Mechanics Lecture 04 Bangla Dhananjoy Banik Joy
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FLUID MECHANICS
Lecture -04
Textbook: Fluid Mechanics by Frank M. WhiteProblem #01: Water at 20°C flows through the elbow in Fig.
P3.60 and exits to the atmosphere. The pipe diameter is D1
=10 cm, while D2 =3 cm. At a weight flow rate of 150 N/s,
the pressure p1= 2.3 atm (gage). Neglecting the weight of
water and elbow, estimate the force on the flange bolts at
section 1.SolutionProblem #02: A 20°C water jet strikes a vane mounted on a tank
with frictionless wheels, as in Fig. The jet turns and falls into the
tank without spilling out. If Ѳ= 30°, evaluate the horizontal force F
required to hold the tank stationary.SolutionProblem #03: The 6-cm-diameter 20°C water jet in Fig strikes a
plate containing a hole of 4-cm diameter. Part of the jet passes
through the hole, and part is deflected. Determine the horizontal
force required to hold the plate.SolutionProblem #04: Air at 20°C and 1 atm flows in a 25-cm-diameter
duct at 15 m/s, as in Fig. The exit is choked by a 90° cone, as
shown. Estimate the force of the airflow on the coneSolution