Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN: 9781259696527
Author: J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher: McGraw-Hill Education
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- 2. Consider a flow of liquid in a horizontal circular tube which is mobile. The flow in the tube is assumed to be fully developed and pressures at two ends are Po and PL. The cylindrical tube has radius of R and length of L. The tube itself is moving along the z-direction with a velocity of Vz (R) = -α Trz (R), where a > 0. a) Obtain the radial velocity profile in the circular tube. b) Find the average velocity Hint (Answer): R Z Fluid flows in z- direction L Uz = ΔΡ 4μL ΔΡ 2L - R21 2μ ΔΡ Uavg=8μL R²+ ΔΡ 2L aR - R2V 2μarrow_forwardThe atmospheric lapse rate on a particular day is constant in the lower part of the atmosphere. At ground level, the pressure is 1020 mBar and the temperature is 15°C. At a height z1 the pressure and temperature are 975 mBar and 11.5 °C. Determine the atmospheric temperature gradient, and the height z1.arrow_forwardTrue or false: Osmotic pressure can be explained by the difference in fugacitiesarrow_forward
- In some of Joule’s experiments (Figure 1), work was done on water held in an adiabatic calorimeter. The work was done by a rotating paddle, driven by falling weights. Assume the volume of the water remains constant during these experiments.a. In one experiment a 25-kg mass was allowed to fall 20 times through a height of 2 m; what was the maximum amount of work done? b. If a 25-kg mass were fired into the calorimeter and brought to a standstill, what should its initial velocity be to accomplish the same effect as in (a)? c. If the calorimeter held 1.2 kg of water and if process (a) caused the water temperature to rise from 288 to 290 K, what is the numerical value for the factor that connects temperature rise to work under these conditions?arrow_forwardHOMEWORK-2 Considering the steady-state laminar flow of a liquid with density p and viscosity p in a vertical tube of length L and radius R; a) Show the momentum flux and velocity profile in the figure. b) Determine the momentum flux distribution, the velocity distribution, the maximum velocity (Vzmax), and the average velocity (Vzaverage) expressions. PL L R ! Po 1111111 Flow inarrow_forwardConsider the steady, isothermal, irrotational flow of an incompressible frictionless fluid subject only to a body force characterized by a potential O, where F,=- V@ (in units of force/volume). Since the fluid is frictionless, the only surface force is due to pressure, F =-pn. By completing a momentum balance on a material volume of fluid subject to the constraints listed above, derive Bernouilli's law, P + ½pv² + O = constant along a fluid streamline.arrow_forward
- Question in imagearrow_forward1. FA Newtonian fluid is flowing between two large parallel plates in the z direction. The top plate is moving in the positive z direction at a constant velocity Vo. The bottom plate is stationary. The velocity profile this flow is given by V(y) = V₁ (a) (b) (77) where 2H is the distance between the two plates. y is the vertical coordinate from the center plane, and is the velocity profile as a function of y. Draw a schematic of the flow system with the appropriate coordinate system. For plates with a total width W in the x-direction and length L in the z-direction, derive an expression for the volumetric flow rate Q through the plates.arrow_forward
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