Heat transfer question.. plz solve. thd
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Heat transfer question.. plz solve. thd For flow of a liquid through a circular tube, the...
3. (a) Explain bulk temperature Tb in circular tube flow. (5point) (b) Calculate bulk temperature Tb...
3. (a) Explain bulk temperature Tb in circular tube flow. (5point) (b) Calculate bulk temperature Tb in circular tube laminar flow with innier diameter 2cm. Assume the following velocity and temperature profiles in the position of r in meter unit. (10point) u 0.1 [ 1 - (r/0.01) ] m/s T 400 3 X 10 (2 X 105 - 0.3+600r) K
Use the integral method for boundary layer flow and convective heat transfer over a flat plate he...
Use the integral method for boundary layer flow and convective heat transfer over a flat plate heated by maintaining a constant heat flux q"w, for the case of very low Prandtl number, Pr0. Assume that the free stream velocity of the fluid, U, and free stream temperature, T-do not vary with x. Using the integral form of energy equation, show that under these conditions: (a) the temperature profile, (T- T) is given by, 41 2 CT-T oa (b) the wall...
8610 mm/s is wrong as well. Viscous liquid from a circular tank, D = 300 mm...
8610 mm/s is wrong as well.
Viscous liquid from a circular tank, D = 300 mm in diameter, drains through a long circular tube of radius R = 50 mm. The velocity profile at the tube discharge is Show that the average speed of flow in the drain tube is V = 1/2 Umax. Evaluate the rate of change of liquid level in the tank at the instant when Umax = 0.155 m/s dh/dt 8.61 the tolerance is +/-2%
2. (20 marks) The fully-developed, laminar fluid flow through a circular pipe is considered to be...
2. (20 marks) The fully-developed, laminar fluid flow through a circular pipe is considered to be one dimensional with a velocity profile given by u(r) = Umax(1 - 52/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 at the center of the pipe. a) Derive a relation for the drag force applied by the fluid on a section of the pipe of...
1. Consider a 5 m long rectangular tube with a hot fluid with the properties specified in the diagram below. The inlet...
1. Consider a 5 m long rectangular tube with a hot fluid with the properties specified in the diagram below. The inlet and outlet fluid temperatures are controlled to vary from 20 to 30 °C by applying a constant heat flux at the surface of the tube. We can ignore conduction and radiation phenomena in this problem and assume that the fluid velocity profile does not change within the tube. Using the Nu correlation from table 8.1 below, find the...
Problem 3: (35pts) Atmospheric air enters the heated section of a circular tube at a flow...
Problem 3: (35pts) Atmospheric air enters the heated section of a circular tube at a flow rate of 0.005 kg/s and a temperature of 30°C. The tube is of diameter D =60mm, and fully developed conditions with h = 30W/m2K exist over the entire length of L-4m. Take cp-1015 /kg.K 2 (a) (10pts) For the case of uniform surface heat flux at q"-1000W/m, determine the total heat transfer rate q and the mean temperature of the air leaving the tube...
Liquid water flows in an ASTM B75 copper tube at a mass flow rate of 3.6...
Liquid water flows in an ASTM B75 copper tube at a mass flow rate of 3.6 g/s. The water enters the tube at 40°C, and the tube surface is subjected to a constant heat flux at a rate of 1.8 kW. The tube is circular with an inner diameter of 25 mm and a length of 3 m. The maximum use temperature for ASTM B75 copper tube is 204°C. Would the surface temperature of the tube exceed the maximum use...
24.54 The pressure gradient for laminar flow through a constant radius tube is given by where p-p...
24.54 The pressure gradient for laminar flow through a constant radius tube is given by where p-pressure (Nm, x (m's), and r= radius (m). distance along the tube's centerline (m), μ dynamic viscosity (N·sm2), Q-flow a. Determine the pressure drop for a 10-cm length tube for a viscous liquid (u 0.005 N s/m2, density - 1x 103 kgm)with a flow of 10x 10-5 m3/s and the following varying radii along its length, x, cm 2 r, mm 2 1.35 1.34...
Question 1: (20 marks) On a circular conduit there are different diameters: diameter Di 1 m chang...
Question 1: (20 marks) On a circular conduit there are different diameters: diameter Di 1 m changes into D2 2 m. The velocity in the entrance profile was measured: v 3 m/s. Calculate the discharge mean velocity at the outlet profle (sce fig. 1). Also, determine the type of flow in both conduit profiles (whether the flow is laminar or turbulent) assume temperature of water following data. T-12° C. Use the Pw 997 kg/m3 Repeat the previous calculations assuming that...
Task 8 6 Pts A so called "flow straightener" is arranged in a tube to produce...
Task 8 6 Pts A so called "flow straightener" is arranged in a tube to produce a flat velocity profile, independent of the profile which is created by the flow. The straightener consist of a package of parallel-arranged thin tubes with small inner diameter, which fills out the entire cross section of the hosting tube (see fig. 1). Here a special design of the straightener is used: it consists of 50 tubes with quadratic cross section (0.025 0.025 m²) and...
3. (a) Explain bulk temperature Tb in circular tube flow. (5point) (b) Calculate bulk temperature Tb in circular tube laminar flow with innier diameter 2cm. Assume the following velocity and temperature profiles in the position of r in meter unit. (10point) u 0.1 [ 1 - (r/0.01) ] m/s T 400 3 X 10 (2 X 105 - 0.3+600r) K
Use the integral method for boundary layer flow and convective heat transfer over a flat plate heated by maintaining a constant heat flux q"w, for the case of very low Prandtl number, Pr0. Assume that the free stream velocity of the fluid, U, and free stream temperature, T-do not vary with x. Using the integral form of energy equation, show that under these conditions: (a) the temperature profile, (T- T) is given by, 41 2 CT-T oa (b) the wall...
8610 mm/s is wrong as well.
Viscous liquid from a circular tank, D = 300 mm in diameter, drains through a long circular tube of radius R = 50 mm. The velocity profile at the tube discharge is Show that the average speed of flow in the drain tube is V = 1/2 Umax. Evaluate the rate of change of liquid level in the tank at the instant when Umax = 0.155 m/s dh/dt 8.61 the tolerance is +/-2%
2. (20 marks) The fully-developed, laminar fluid flow through a circular pipe is considered to be one dimensional with a velocity profile given by u(r) = Umax(1 - 52/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 at the center of the pipe. a) Derive a relation for the drag force applied by the fluid on a section of the pipe of...
1. Consider a 5 m long rectangular tube with a hot fluid with the properties specified in the diagram below. The inlet and outlet fluid temperatures are controlled to vary from 20 to 30 °C by applying a constant heat flux at the surface of the tube. We can ignore conduction and radiation phenomena in this problem and assume that the fluid velocity profile does not change within the tube. Using the Nu correlation from table 8.1 below, find the...
Problem 3: (35pts) Atmospheric air enters the heated section of a circular tube at a flow rate of 0.005 kg/s and a temperature of 30°C. The tube is of diameter D =60mm, and fully developed conditions with h = 30W/m2K exist over the entire length of L-4m. Take cp-1015 /kg.K 2 (a) (10pts) For the case of uniform surface heat flux at q"-1000W/m, determine the total heat transfer rate q and the mean temperature of the air leaving the tube...
Liquid water flows in an ASTM B75 copper tube at a mass flow rate of 3.6 g/s. The water enters the tube at 40°C, and the tube surface is subjected to a constant heat flux at a rate of 1.8 kW. The tube is circular with an inner diameter of 25 mm and a length of 3 m. The maximum use temperature for ASTM B75 copper tube is 204°C. Would the surface temperature of the tube exceed the maximum use...
24.54 The pressure gradient for laminar flow through a constant radius tube is given by where p-pressure (Nm, x (m's), and r= radius (m). distance along the tube's centerline (m), μ dynamic viscosity (N·sm2), Q-flow a. Determine the pressure drop for a 10-cm length tube for a viscous liquid (u 0.005 N s/m2, density - 1x 103 kgm)with a flow of 10x 10-5 m3/s and the following varying radii along its length, x, cm 2 r, mm 2 1.35 1.34...
Question 1: (20 marks) On a circular conduit there are different diameters: diameter Di 1 m changes into D2 2 m. The velocity in the entrance profile was measured: v 3 m/s. Calculate the discharge mean velocity at the outlet profle (sce fig. 1). Also, determine the type of flow in both conduit profiles (whether the flow is laminar or turbulent) assume temperature of water following data. T-12° C. Use the Pw 997 kg/m3 Repeat the previous calculations assuming that...
Task 8 6 Pts A so called "flow straightener" is arranged in a tube to produce a flat velocity profile, independent of the profile which is created by the flow. The straightener consist of a package of parallel-arranged thin tubes with small inner diameter, which fills out the entire cross section of the hosting tube (see fig. 1). Here a special design of the straightener is used: it consists of 50 tubes with quadratic cross section (0.025 0.025 m²) and...
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