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The instrument is widely used, particularly in the polymer industry. (c) Show that the torque required to turn the cone is given by This is the standard formula for calculating the viscosity from measurements of the torque and angular velocity for a cone-plate assembly with known R and rCr,. (d) For a cone-and-plate instrument with radius 10 cm and angle Go equal to 0.5 degree, what torque (in dyn. cm) is required to turn the cone at an angular velocity of 10 radians per minute if the fluid viscosity is 100 cp?

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This is possible because the heat is penetrating just a very short distance into the fluid. (d) Use the dimensionless variables W77) = (T - To)/(Tl - To) and 7 = y/m to rewrite the differential equation as (see Eq. Application of chemical engineering principles and methods of chemical process synthesis, simulation and economics on open ended process and/or product design problems. Carbon dioxide at 3 atm pressure and WC enters the other end of the “T” at a flow rate of 4 kmol nun-‘.

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With a strong background in mathematics, chemistry, and physics, chemical engineering students study transport phenomena (the description of momentum, heat, and mass transfer in chemical processes); chemical kinetics and reaction engineering; process control and design; and optimization of chemical processes. All the terms in Eq. 9.8-5 have the same sign convention, so that ex is the energy transport in the positive x direction per unit area per unit time.

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We can thus obtain in which where the superscript ext refers to conditions in the external solution of the same composition as the pore fluid. Filtration pressure in 200 sec is slowly raised to 500 kN/m2 at a constant rate. Simplified Case for Systems with Negligible Internal Resistance. For example, + etc. 828 Appendix A Vector and Tensor Notation Spherical Coordinates We now tabulate for reference the same kind of information for spherical coordinates r, 0,4. However, there is another mechanism which contributes even more to the transfer of heat.

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Kesler, AICkE Journal, 21, 510-527 (1975), and Eq. 17.3-11 for the low-pressure limit. 0.6 0.8 1.0 1.5 2 3 4 5 Reduced temperature, T, = T / T, (ii) One can predict a value of &hAA* in the low-density region by the methods given in 517.3 and then proceed as in (i). (iii) One can use the empirical formula (see Problem 17A.9): This equation, like Eq. 17.2-1, should not be used for helium or hydrogen isotopes. Calculate this factor as a function of temperature.

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Figure 8-6. gives us the following type of solution: (8-22). interchange subscripts c and h.) Based on this the effectiveness. together with the effectiveness approach.186 HEAT EXCHANGERS 4 c 0 .lo). is then (for parallel flow) (8-20) (8-21) Manipulation of equation (8. Physical properties of food materials; flow of particulate solids; steady and unsteady state heat and mass transfer operations (thermal and aseptic processing, cooking, frying, extrusion); microwave and ohmic heating; nonthermal preservation techniques; influence of processing on the nutritional quality of foods.

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Alberty, Physical Chemistry, Wiley, New York, 3rd edition (20011, pp. 639-640. For the assumptions of constant density, constant transport coefficient, no generation, and no convection, Eq. (3.78) becomes This equation assumes many useful forms. A degree program in chemical engineering was established at Columbia in 1905 and the first class graduated in 1909. CHEMICAL E GI EERI G COURSE STRUCTURE: YEAR O E: FIRST ... Prerequisites: CHEN 205, MATH 308 or approval of instructor.

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The ratio of the inertial forces to the viscous forces gives a dimensionless grouping p D V ~ Inertia forces .. for Reynolds numbers up to 2100 the flow is laminar. As in 54.4 we consider the steady two-dimensional flow around a submerged object such as that shown in Fig. 4.4-1. There are many correlations for heat transfer to a single cylinder over which the fluid is flowing in a normal direction with velocity U,. Develop an expression for the amount of heat transferred in an exchanger of the type discussed in Example 15.4-1, if the overall heat transfer coefficient U varies linearly with the temperature of either stream. (a) Since Th - T, is a linear function of both Th and T,, show that U - U, - A T - A T, - U2 - U, AT2 - ATl in which AT = Th - T,, and the subscripts 1 and 2 refer to the conditions at control surfaces 1 and 2.

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The slurry of Problem 14-16 is to be filtered in a plate and frame press (20 frames, 0.873-m2 area per frame). QL, SE.�W. (W.) Lecture/discussion�4 hours. No is initial viscosity: qo is initial viscosity; qas is viscosity after infinite time. (Adapted with permission from reference 5. At time t = 0, a mass m, of species A is in- jected into a large body of fluid B. D. students are required to take this course. ISBN: 0-471-43819-7 RADIATION HEAT TRANSFER INTRODUCTION We have previously discussed two of the three modes of heat transfer (conduction and convection).

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Every major university in North America offers degree programs in chemical engineering. Offered irregularly. �W. (W.) Lecture�3 hours; discussion�1 hour. Example 13-2 Repeat Example 13-1 using Figures 13-4 and 13-8. Separation processes involving single and multiple staged, and continuous contacting operations for gas-liquid, and solid-fluid systems; process design and equipment for gas absorption packed columns, humidification/dehumidification and liquid cooling towers; introduction to drying, filtration, membrane separation, liquid-liquid extraction, leaching, and adsorption processes.

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