Fluid Mechanics Fundamentals and Applications 3rd Edition solutions

Fluid Mechanics Fundamentals and Applications 3
A fluid that occupies a volume of 24 L weighs 225 N at a location where the gravitational acceleration is 9.80 m/s2. Determine the mass of this fluid and its density.

Fluid Mechanics Fundamentals and Applications 3
The 0.5-m-radius semi-circular gate shown in the figure is hinged through the top edge AB. Find the required force to be applied at the center of gravity to keep the gate closed.

Fluid Mechanics Fundamentals and Applications 3
The hull of a boat has a volume of 180 m3, and the total mass of the boat when empty is 8560 kg. Determine how much load this boat can carry without sinking (a) in a lake and (b) in seawater with a specific gravity of 1.03.

Fluid Mechanics Fundamentals and Applications 3
To reduce the drag coefficient and thus to improve the fuel efficiency of cars, the design of side rearview mirrors has changed drastically in recent decades from a simple circular plate to a streamlined shape. Determine the amount of fuel and money saved per year as a result of replacing a 13-cm-dia

Fluid Mechanics Fundamentals and Applications 3
An inverted cone is placed in a water tank as shown. If the weight of the cone is 16.5 N, what is the tensile force in the cord connecting the cone to the bottom of the tank?

Fluid Mechanics Fundamentals and Applications 3
A water pump is used to pump water from one large reservoir to another large reservoir that is at a higher elevation. The free surfaces of both reservoirs are exposed to atmospheric pressure, as sketched in Fig. P1443. The dimensions and minor loss coefficients are provided in the figure. The pumps p

Fluid Mechanics Fundamentals and Applications 3
A semicircular 40-ft-diameter tunnel is to be built under a 150-ft-deep, 800-ft-long lake, as shown in Fig. P3162E. Determine the total hydrostatic force acting on the roof of the tunnel.

Fluid Mechanics Fundamentals and Applications 3
The dynamic viscosity of air at 20C and 200 kPa is 1.83 3 1025 kg/m?s. The kinematic viscosity of air at this state is (a) 0.525 3 1025 m2/s (b) 0.77 3 1025 m2/s (c) 1.47 3 1025 m2/s (d ) 1.83 3 1025 m2/s (e) 0.380 3 1025 m2/s

Fluid Mechanics Fundamentals and Applications 3
The specific gravity of a fluid is specified to be 0.82. The specific volume of this fluid is (a) 0.00100 m3/kg (b) 0.00122 m3/kg (c) 0.0082 m3/kg (d ) 82 m3/kg (e) 820 m3/kg

Fluid Mechanics Fundamentals and Applications 3
Summarize the eight steps involved in a typical CFD analysis of a steady, laminar flow field.

Fluid Mechanics Fundamentals and Applications 3
A small aircraft has a wing area of 35 m2, a lift coefficient of 0.45 at takeoff settings, and a total mass of 4000 kg. Determine (a) the takeoff speed of this aircraft at sea level at standard atmospheric conditions, (b) the wing loading, and (c) the required power to maintain a constant cruising sp

Fluid Mechanics Fundamentals and Applications 3
Consider a modified form of Couette flow in which there are two immiscible fluids sandwiched between two infinitely long and wide, parallel flat plates (Fig. P9104). The flow is steady, incompressible, parallel, and laminar. The top plate moves at velocity V to the right, and the bottom plate is stat

Fluid Mechanics Fundamentals and Applications 3
Air flows parallel to a speed limit sign along the highway at speed V 5 8.5 m/s. The temperature of the air is 25C, and the width W of the sign parallel to the flow direction (i.e., its length) is 0.45 m. Is the boundary layer on the sign laminar or turbulent or transitional?

Fluid Mechanics Fundamentals and Applications 3
A centrifugal pump rotates at n . 5 750 rpm. Water enters the impeller normal to the blades (a1 5 0) and exits at an angle of 35 from radial (a2 5 35). The inlet radius is r1 5 12.0 cm, at which the blade width b1 5 18.0 cm. The outlet radius is r2 5 24.0 cm, at which the blade width b2 5 16.2 cm. Th

Fluid Mechanics Fundamentals and Applications 3
During a winter day, wind at 55 km/h, 58C, and 1 atm is blowing parallel to a 4-m-high and 10-m-long wall of a house. Approximating the wall surfaces as smooth, determine the friction drag acting on the wall. What would your answer be if the wind velocity has doubled? How realistic is it to treat the

Fluid Mechanics Fundamentals and Applications 3
In order to avoid boundary layer interference, engineers design a boundary layer scoop to skim off the boundary layer in a large wind tunnel (Fig. P1097). The scoop is constructed of thin sheet metal. The air is at 20C, and flows at V 5 45.0 m/s. How high (dimension h) should the scoop be at downstre

Fluid Mechanics Fundamentals and Applications 3
Consider a blimp that can be approximated as a 3-m diameter, 8-m long ellipsoid and is connected to the ground. On a windless day, the rope tension due to the net buoyancy effect is measured to be 120 N. Determine the rope tension when there are 50 km/h winds blowing along the blimp (parallel to the

Fluid Mechanics Fundamentals and Applications 3
What is the difference between the upstream velocity and the free-stream velocity? For what types of flow are these two velocities equal to each other?

Fluid Mechanics Fundamentals and Applications 3
The speed of an aircraft is given to be 260 m/s in air. If the speed of sound at that location is 330 m/s, the flight of aircraft is (a) Sonic (b) Subsonic (c) Supersonic (d) Hypersonic

Fluid Mechanics Fundamentals and Applications 3
An incompressible Newtonian liquid is confined between two concentric circular cylinders of infinite length a solid inner cylinder of radius Ri and a hollow, stationary outer cylinder of radius Ro (Fig. P995; the z-axis is out of the page). The inner cylinder rotates at angular velocity vi . The flow