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Find the terminal velocity and drag force when a spherical water drop, 5 pm in diameter, falls through air at 20°C. For the region 5 < yvJv < 30 no simple analytical derivations are available, and empirical curve fits are sometimes used. ZL = VL OL (14-36) This equation together with the balance equation CL = cozo ZL +LJL~L (14-37) give CLZi = COZO (14-38) where CL is the concentration at Z L and &! Heat is generated within a spherical catalyst particle because of chemical reaction.

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Graduate students engage in an industrial research internship experience with collaborators in industry. Design engineers often work in a consulting role, designing plants to meet clients' needs. Having specified these two dimensionless variables, the choice of dimensionless axial coordinate follows naturally. The pressure drop across the venturi is read with a U-t&e manometer, whose reading is 15cm. In this problem we investigate the corresponding two limiting values of the Nusselt number. (a) First use Eq.

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Pressure diffusion Separation of large. 43 16. A thorough understanding of the physics of radiative transport requires the use of several different discipline^:',^ electromagnetic theory is needed to describe the essen- tially wavelike nature of radiation, in particular the energy and pressure associated with electromagnetic waves; thermodynamics is useful for obtaining some relations among M. Answer: 0.110 ft3/s Loss of catalyst particles in stack gas. (a) Estimate the maximum diameter of microspherical catalyst particles that could be lost in the stack gas of a fluid cracking unit under the following conditions: Gas velocity at axis of stack = 1.0 ft/s (vertically upward) Gas viscosity = 0.026 cp Gas density = 0.045 lb/ft3 Density of a catalyst particle = 1.2 g/cm3 Express the result in microns (1 micron = 10-~rn = lpm). (b) Is it permissible to use Stokes' law in (a)?

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A conical container from which a fluid is allowed to drain. The resulting quasi-binary problems may then be solved, using theory or correlations of experiments, and the results combined5 via Eqs. 22.9-7 and 9 to get the multicomponent solution in terms of [XI and [ J"]. The filter should deliver I 1.33 m3 of solid-free filtrate over a 2-hr period. If we take C D for the rate of fall of the smallest particles, we have Stokes Law flow and (14-26) The centrifugal field strength changes radially.

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Relative volatilities are 2 (high pressure) and 3 (low pressure). Kurata, AIChE Journal, 6,547-550 (1960) and 7,6S (1961); E. In this chapter specific applications of the balance to molecular transport will be discussed. Topics include the stability of macroemulsions, the formulation and properties of microemulsions, and surface metal-support interactions of catalysts. Ideal elastic solid spring model. that time is a parameter. the piston moves to a new location.

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We consider these two types of contributions separately here, thus decoupling Eq. 13.6-15 into two equations. Not open for credit to Chemical Engineering and Biochemical Engineering majors or students who have completed Chemical and Materials Science 5. Moreover, the author builds both readers' interest and knowledge by: Demonstrating that transport phenomena are pervasive, affecting every aspect of life Offering historical perspectives to enhance readers' understanding of current theory and methods Providing numerous examples drawn from a broad range of fields in the physical and life sciences and engineering Contextualizing problems in scenarios so that their rationale and significance are clear This text generally avoids the use of commercial software for problem solutions, helping readers cultivate a deeper understanding of how solutions are developed.

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Basic engineering principles of nanofabrication. American Institute of Chemical Engineer.1 0. The boundary con- ditions are very similar to those used in heat conduction (see §10.1): a. Orientation course for freshmen-level students. Note that the side of the duct is taken as D. Estimate the Nusselt number and the heat transfer coefficient by (a) DittusBoelter, (b) Sieder-Tate, (c) Sleicher-Rouse, (d) Colbum analogy, (e) FriendMetzner, (f) Figure 11.9, for the assigned cases below.

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Mass transfer with simultaneous chemical reaction and heat transfer. In the absence of a shock wave, the flow through a well-designed nozzle is vir- tually frictionless (hence isentropic for the adiabatic situation being considered). HO (eds.): Purdue University Thermophysical Properties Research Center. The Fourier series solution to Eq. (13.32) was presented previously: 0 _ z-(x, I) - Tf 4 =;jGz5,.,.i s,- T,-Tf [sin(X$+P(-(g)‘M)] (13.

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Johnson, ed.), CRC Press, Boca Raton, Fla. (19981, p. 3-13. From Eq. 11.5-16 it may be seen that such a ratio of temperature differences will not per- mit equality of the Brinkman number. The term containing the kinetic energy and enthalpy can be disregarded, since the y-component of the v vector is zero. The task of performing these balances is now aided by process simulators, which are complex software models that can solve mass and energy balances and usually have built-in modules to simulate a variety of common unit operations.

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If the bar's emissivity is 0.9, estimate the initial rate of heat transfer. Synchotron Characterization of Nano-Materials (4) Advanced topics in characterizing nano-materials using synchrotron x-ray sources. Concentration of ammonia at the second boundary is negligible. In the parallel case, Fig. lO.l6(a), the pressure drop across each leg is the same. Whereas incompressible Newtonian fluids are described by only one material constant (the viscosity), one can measure many different material functions for non-Newtonian liquids.