Consider laminar flow of water in a 0.85-cm-diameter pipe at a rate of 1.15 L/min. The velocity (m/s) of water halfway between the surface and the center of the pipe is ?

Water at 10 C flows in a 1.25-cm-diameter pipe at a rate of 1.33 L/min. The hydrodynamic entry length (in meters) is

Water in a duct of area 0.1 m2 has an average velocity of 7 m/s. The duct tapers slowly to 0.4 m2. What is the new average velocity?

Water (p = 1003.8 kg/m³) flows at the rate of 3.95 L/s in a pipe of diameter 31 mm, which enlarges to 44 mm diameter. Calculate the water mass flow rate in kg/s. Answer: 27

Consider laminar flow of water in a 0.9-cm-diameter pipe at a rate of 1.15 L/min. The velocity (m/s) of water halfway between the surface and the center of the pipe is ?

Q3 Glycerin at 40°C with density of 1252 kg/m³ and viscosity of 0.27 kg/m.s is flowing through a 5-cm-diameter horizontal pipe made of stainless steel with a mean velocity of 4 m/s. Determine the pressure drop per 10 m of the pipe and the required pumping power. What will be the required pumping power if the fluid changed to air.

Glycerin at 40°C with ? = 1252 kg/m3 and ? = 0.27 kg/m·s is flowing through a 6-cm-diameter horizontal smooth pipe with an average velocity of 3.5 m/s. Determine the pressure drop per 10 m of the pipe.

Two vertical tanks, one with circular section 3.0 m in diameter, the other square section 1.33 m x 1.33 m are connected by a short tube ( area is 0.725 sq. cm) near bottom. Initially, the head of oil in the first tank is 4.0 m, while in the second tank the head is 60 cm. After a quick opening of the tube's vlave, find the time for the oil surfaces to equalize. Assume the tube properties to be similar to that orifice, with C= 0.78.   a.21 seconds b.23 seconds c.35 seconds d.26 seconds

In regions far from the entrance, fluid flow through a circular pipe is one dimensional, and the velocity profile for laminar flow is given by u(r) = umax(1 − r2/R2), where R is the radius of the pipe, r is the radial distance from the center of the pipe, and umax is the maximum flow velocity, which occurs at the center. Obtain (a) a relation for the drag force applied by the fluid on a section of the pipe of length L and (b) the value of the drag force for water flow at 20°C with R = 0.08 m, L = 30 m, umax = 3 m/s, and ? =0.0010kg/m⋅s.

The figure below shows a turbine with an inlet pipe and a draft tube. If the efficiency of the turbine is only 80 percent and the discharge of the water is 1000 litres per second. Calculate: (a) the power developed by the turbine: (b) The reading of the gauge G: