a)AKE in ft-lb:/Ibm b)APE in ft-lb;/lbm c)AW (flow work) ft-lb/lbm d)AH in BTU e) Net work in hp for 15 lb/min of fluid (use mass flow rate for this item only)
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- Q2: A drop of liguid foluen is kept al uniform temperkure t 299 K and is suspended in air by a fine wire. The initid radius at r= 2mm. The vapor pressure of foluene 299K is f=384 Kfe and the density of liguid toluene is 366 ky Im 3. Derive equation for the time tp for the drop b evupurete Completely in a large volume of still air Calculate the tine in seconds for Complete evaporahion.EN.3060 - Transport Phet Consider the system shown below in which a rod is contained within a coaxial cylinder. The system is aligned vertically. The rod has a radius Ri and the outer cylinder has a radius of R2. The region between the rod and outer cylinder contains an incompressible Newtonian liquid that has a density p and viscosity u. The rod is being moved in the positive z-direction at a constant velocity V while the outer cylinder is stationary. Assume the liquid is in steady fully developed laminar flow and there is no pressure gradient acting on the liquid in the direction in which the rod is moving. (a) Write the simplified forms of the Continuity and Navier-Stokes Equations in cylindrical coordinates that will be used for solving for the velocity profile in the liquid. (b) Write the applicable boundary conditions that will be used to solve for the velocity profile. (c) Solve for the velocity profile v in terms of r, R1, R2, V, p, g and u. (d) Assume the rod has a radius RI=3…PROBLEM 3. The assembly shown constructed from a steel bolt with a diameter of 8 mm and fits and a magnesium sleeve with an inner diameter of 10 mm and an outer diameter of 12 mm. The length of the sleeve is 150 mm. The assembly is originally at a temperature of T1 temperature is raised to a final value of T2 = 120°C. If there is gap of 0.1 mm between sleeve and the rigid washer at end B before the heating, determine the average normal stress in the bolt and the = 20°C and then the sleeve. Est = 200 GPa, Emg = 44.7 GPa, a,t = 14(10°)/°C, amg = 26(10)/"C. Rigid washers 150 mm 0,1 mm
- Determine the reaction at A in the given figure. (please submit your solution for this item) * 2 kN/m 600mm- 450 mm 300 mmThe cage system shown in the figure is made of EC rod. The Flow Limit of the material is 180 MPa and the Safety Coefficient is 4 is desired to be. Accordingly, the circular cross section EC rod Calculate the diameter.The nutural frequancy for the system is equal to Ek rigid uniform bar of mass (m) P b 1 3kb²+PL 2n mL² the Answer is 1 3kb2 –3PL mL²
- 1. When the force of 3 mN is applied to the plate the line AB in the liquid remains straight and has a velocity of 0.6x103 m/s. If the surface area of the plate in contact with the liquid is 0.6 m2, determine the approximate viscosity of the liquid. В в B B' 3 mN 4 mm AA steel measuring tape used by a civil engineer is 50 m long and calibrated at 20oC.The tape measures a distance of 35.694m at 35oC. What is the actual distance measured? D = D L L T ( )( )( ) a Coefficient of linear expansion of steel a = 1.2 x 10-5oC-1An aluminum pipe has a length of 53 m at a temperature of 7°C. An adjacent steel pipe at the same temperature is 7 mm longer. At what temperature will the aluminum pipe be 21 mm longer than the steel pipe? Assume that the coefficient of thermal expansion for the aluminum is 22.5x10-6/°C and that the coefficient of thermal expansion for the steel is 12.5×106/°C. Answer: Tf = i °C
- The thin steel cylinder just fits over the inner aluminum cylinder as shown in Fig. 4-7. Find the tangential stresses in each shell due to a temperature rise of 33°C. Do not consider the effects introduced by the accompanying axial expansion. (This arrangement is sometimes used for storing corrosive fluids.) Use Est = 200 GPa Eal = 72 GPa SOLUTION: The simplest approach is to first consider the two shells to be separated from one another so that they are no longer in contact. 51 cm 150.5 cm 50 cm α = 17.3x10-6/°C = 22.5×10 %/°C αal = Steel Aluminum Fig. 4-7What temperature is required to obtain 0.4%C at a distance of 0.3 mm beneath the surface of a 0.22% C steel in 2h, when 1.1% C is present at the surface? Assume that the iron is FCC. (Please see figure 5.12 below for diffusion coefficient data. Please use your notes for a table of erf() function values Diffusion coefficient D (cm²/s) ܐ ܐ ܐ ܐ 10- 10-5 10- 10-10 10-11 10-12 10-13 10-14 10-15 Temperature (°C) 2000 1500 1200 1000 900 800 700 600 Cin graphite Mg in MgO Ca in Cao H in FCC iron C in FCC iron Fe in FCC iron Fe in BCC iron H in BCC iron C in BCC iron Fe in FeO 500 5 6 7 8 9 10 11 12 13 104 T(K) Figure 5-12 The diffusion coefficient D as a function of reciprocal temperature for some metals and ceramics. In this Arrhenius plot, D represents the rate of the diffusion process. A steep slope denotes a high activation energy.1. The value of the viscosity of an ideal fluid is a) zero b) unity c) infinity d) more than that of a real fluid