To a good approximation, the dynamic viscosity the thermal conductivity k, and the specific heat cp are independent of pressure. In what manner do the kinematic viscosity and thermal diffusivity vary with pressure for an incompressible liquid and an ideal gas? Determine
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Fundamentals of Heat and Mass Transfer
- no previous attempt pleasearrow_forwardA study of the physical characteristic of honey was conducted due to thelarge demand of royal jelly. A capillary tube viscometer was used by aresearcher in determining the viscosity of the honey. The viscometer is250 mm long with an outside diameter of 55mm and effective thickness of2.5mm and was used horizontally so that the effect of gravity wasneglected. At an ambient temperature of 30oC the following data werecollected: ΔP (Pa) Q (cc/s)10.0 1.2512.5 1.5515 1.8017.5 2.0520.0 2.55 What will be the stress produced per unit length in the tube used in theproduction of royal jelly if it has a radius of 5mm and a flow of 1 capsuleper second. (1 capsule = 0.85 cc of royal jelly).arrow_forwardPlease solve with explanationarrow_forward
- Please help me with the correct solution . The answer must be correct.arrow_forward9:25 G令. View Recordings PROBLEM SET A (4 problems) Problem 1 The sliding plate viscometer shown below is used to mensture the viscosity of a fluid. The top plate is movmg to the right with a coustant velocity of 10 m's in re stationary. What is the viscosity of the fluid? Assume a linear velocity distribution e to a force of 3 N. The bottom plate is to m 1 mm Problem 2 Calculate the density and specific weight of carbou dioxide at a pressure of 300 kN'm“ absolute and 60°C. Problem 3 A 10 m' oxygen tank is at 15°C and 800 kPa. The valve is opened, and some oxygen is released until the pressure in the tank drops to 600 kPa. Calculate the mass of oxygen that has been released from the tank if the temperature in the tank does not change during the process. 40:45 59:06 C ||arrow_forwardConsider a thin-walled, fi xed-volume container of volume V that holds an ideal gas at constant temperature T. It can be shown by dimensional analysis that the number of particles striking the walls of the container per unit area per unit time is given by nv-/4, where as usual n is the particle number density. The container has a small hole of area A in its surface through which the gas can leak slowly. Assume that A is much less than the surface area of the container. (a) Assuming that the pressure inside the container is much greater than the outside pressure (so that no gas will leak from the outside back in), estimate the time it will take for the pressure inside to drop to half the initial value. Your answer should contain A, V, and the mean molecular speed v-. (b) Obtain a numerical result for a spherical container with a diameter of 40 cm containing air at 293 K, if there is a circular hole of diameter 1.0 mm in the surface.arrow_forward
- Toluene is contined between two identical and parallel lines each of area 5m^2. The top plate is pulled in minus x direction by a force of 0.083N at a velocity of 0.3 m/s. The bottom plate is pulled in the opposite direction by a force of 0.027N at a velocity of 0.1 m/s. Thr plates are 10mm apart. Calculate the viscosity in cParrow_forwardI need the answer as soon as possiblearrow_forwardTwo plates are positioned at distance of 1.3 mm from each other. One of the plates is moving at velocity of 0.5 m/s; the movement requires a shear stress of 5 N/m². Calculate dynamic viscosity of the fluid between the plates by assuming linear velocity distribution. Round off the answer to three decimal digits in kg/ms, but enter the answer without the unit. Answer:arrow_forward
- A cube-shaped object with a mass of 60 kg and an edge of 500 mm long will be raised up with the help of an inclined plane. Surface of inclined plane; dynamic viscosity 0.8374 kg / m.it is coated with 0.05 mm thick oil film which is s. In order to pull this object up at a constant speed of 0.1 M/s, 713 N forces are applied in the direction parallel to the inclined surface. Calculate the angle that this inclined plane makes with the bed.arrow_forwardA rod of diameter 0,08 m and length 0,13 m is inside a concentric cylindrical casing. The rod and its casing are vertically located. A liquid of density 900 kg/m3 and viscosity 0.9 Pa.s is used as a lubrication medium between rod and its casing. The rod is rotated at a speed of 46 rad/s. Due to the narrow clearance 0,03 m between rod and casing gravitational effects and surface curvature effects are ignored . Assume liquid flow in clearance as laminar steady and incompressible and use pi number, π = 3.14 a) What is the magnitude of shearing stress over the rod (in Pa)? b) What is the magnitude of frictional torque on rod (in N m)? c) What is the magnitude of Reynolds Number of flow ? Use clearence as dimensional characteristics in Reynolds Number calculationarrow_forwardA nuclear reactor is cooled by liquid sodium. The liquid sodium has the following properties: dynamic viscosity = 0.41 mPa·s, specific heat capacity = 1.2 kJ/kgK, thermal conductivity 82 W/mK. Which of the following statements is correct for this scenario? please explain A The thermal boundary layer is thicker than the hydraulic boundary layer. B Heat is transferred through the fluid more easily than momentum. C The velocity varies significantly from the surface to the thickness of the thermal boundary layer. D The hydraulic boundary layer is thicker than the thermal boundary layer.arrow_forward
- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning