4. An experimental test rig is used to examine two-phase flow regimes in horizontal pipelines. A particular experiment involved uses air and water at a temperature of 25°C, which flow through a horizontal glass tube with an internal diameter of 25.4 mm and a length of 40 m. Water is admitted at a controlled rate of 0.026 kgs-¹ at one end and air at a rate of 5 × 104 kgs-¹ in the same direction. The density of water is 1000 kgm 3, and the density of air is 1.2 kgm ³. Determine the mass flow rate, the mean density, gas void fraction, and the superficial velocities of the air and water. Answer: 0.02605 kgs-¹, 61.1 kgm-³, 0.94, 0.822 ms ¹, 0.051 ms-¹

4. An experimental test rig is used to examine two-phase flow regimes in horizontal pipelines. A particular experiment involved uses air and water at a temperature of 25°C, which flow through a horizontal glass tube with an internal diameter of 25.4 mm and a length of 40 m. Water is admitted at a controlled rate of 0.026 kgs-¹ at one end and air at a rate of 5 × 104 kgs-¹ in the same direction. The density of water is 1000 kgm 3, and the density of air is 1.2 kgm ³. Determine the mass flow rate, the mean density, gas void fraction, and the superficial velocities of the air and water. Answer: 0.02605 kgs-¹, 61.1 kgm-³, 0.94, 0.822 ms ¹, 0.051 ms-¹

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.15P

See similar textbooks

Similar questions

Problem 5: A fluid flows by gravity down an 8-cm galvanized ironpipe. The pressures at the higher and lower locations are 120 kPaand 140 kPa, respectively. The horizontal distance between thetwo locations is 30 m, and the pipe has a slope of 1-m rise per10 m of run (horizontal distance). For a fluid with a kinematicviscosity of 10-6 m2/s and a density of 900 kg/m3, determinethe flow rate (in m3/s).
A horizontal pipe bend with a deflection angle of 120o has an entrance diameter of 300 mm and exit diameter of 100 mm. Oil with a density of 860 Kg/m3 enters at the rate of 3.6 m/s and at a pressure of 180 KPa. Determine the magnitude of the force required to hold the bend in place for (a) smooth flow; (b) a situation where head loss is 0.05(v100-v300) 2/2g.
Consider steady developing laminar flow of water in a constant-diameter horizontal discharge pipe attached to a tank. The fluid enters the pipe with nearly uniform velocity V and pressure P1. The velocity profile becomes parabolic after a certain distance with a momentum correction factor of 2 while the pressure drops to P2. Obtain a relation for the horizontal force acting on the bolts that hold the pipe attached to the tank.
Water is discharging through a circular orifice plate 25mm in diameter in the vertical side of the tank of a constant plan area 0.4m2. It is observed that the time taken for the water level to fall from 1.5m to 1.4m above the orifice is24.5 seconds. Show that the average volumetric flow rate is 1.633*10^-3 m^3/s.By approximating the height as being a constant value (1.4m, 1.5m or 1.45m) for discharge rate calculation, estimate the coefficient of discharge for this orifice plate, and give highest and lowest plausible values from the data supplied.
Fluid of constant density is flowing at a velocity of 0.5 meter per second into a horizontal nozzle of decreasing cross-section. The velocity of water ,in meter per second, going out of the nozzle if the diameter at the exit point is 1/3 the diameter in the entry point is
Answwer with diagram and complete solution: Establish the shear stress profile, velocity profile, maximum and average velocities, and the volumetric flowrate of an incompressible Newtonian fluid flowing at a laminar condition and constant temperature through a pipe of length L and a diameter of D (or radius R). Assume that a difference in pressure induces the flow and that the flow is at a steady state.
A pipe 100mm bore carries oil of density 900 kg/m3 at a rate of 4 kg/s. thepipe reduces to 60mm bore and rises 120m. the pressure at this point isatmospheric (zero gauge) assume no frictional losses.Determine:The volume per secondThe velocity at each sectionThe pressure at the lower end The above pipe is exchanged for a parallel pipe with a cross sectional area of 0.3m2 and is 20 m long, with a surface roughness coefficient of 0.005. The dynamicviscosity of the water is 1.002 x 10-3 Ns/m. Find the Reynold’s number of the flowand use Haarland’s formula to find the friction coefficient and Darcy’s formula todetermine the frictional pressure loss. Then determine the pressure at the outlet ofthe pipe.What does the magnitude of the Reynolds number mean to fluid flow
Two water reservoirs A and B are connected to each other through a 40-m-long, 2-cm-diameter cast iron pipe with a sharp-edged entrance. The pipe also involves a swing check valve and a fully open gate valve. The water level in both reservoirs is the same, but reservoir A is pressurized by compressed air while reservoir B is open to the atmosphere at 95 kPa. If the initial flow rate through the pipe is 1.5 L/s, determine the absolute air pressure on top of reservoir A. Take the water temperature to be 10°C.
SAE 30 oil at 20°C flows in the 2.5-cm-diameter pipe as shown in the figure below, which slopes at 37°. For SAE 30 oil, take ρ = 891 kg/m3 and μ = 0.29 kg/m⋅s. Determine the flow rate in m3/h. The flow rate is m3/h.
A clothes dryer discharges air at 1 atm and 120°F at a rate of 1.2 ft3/s when its 5-in-diameter, well-rounded vent with negligible loss is not connected to any duct. Determine the flow rate when the vent is connected to a 15-ft-long, 5-in-diameter duct made of galvanized iron, with three 90° flanged smooth bends. Take the friction factor of the duct to be 0.019, and assume the fan power input to remain constant.
Using the situation below, how would I determine the net resultant force exerted on the reducer by the water? In this situation, water is flowing horizontally in a pipe that has a diameter of 25cm. This water is flowing at 8 m/s and at 300 kPa gage it enters a 90 degree bend reducing section. This bend reducing section is connected to a vertical pipe that has a diamater of 15cm. Moreover, the inlet of the bend is 45 cm above the exit. Here, fricition and gravity are negligible and the momentum flux correction factor is 1.04.
Water is flowing in a conical tube. the inlet conditions are D=100mm, v=1m/s & density = 1000kg/m3. determine the velocity of the water at the discharge point. The outlet diameter is20mm. a. 0.18b. 0.1c. 0.5d. 0.25