PS4_Spring2009

PS4_Spring2009 - fluid flow The final equations...

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ChemE 3230 (Spring 2009) Problem Set #4 (Due by 03/06/2009) 1.0 A fluidized bed reactor containing catalyst particles (SG 1.65, mean diameter: 50 µ m.), is used to convert a hydrogen chloride gas stream into chlorine gas at a temperature of 400 o F and pressure of 1 atm. If the stream has a density of 0.21 lb/ft 3 and a viscosity of 0.02 cP under these conditions, determine the largest range of flow rates over which the reactor can be operated. You may assume ! mf = 0.42 . [30 points] 2.0 Denn 4.6 [20 points] 3.0 Denn 4.8 [20 points] 4.0 Beginning on page 147, Denn derives the microscopic momentum balance for
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Unformatted text preview: fluid flow. The final equations obtained (Eqs 7.3.1a, 7.3.1b, 7.3.1c), are similar in form to the more compact result derived in the class notes, ! ( " v ) ! t = #$ % ( vv ) - $ p # $ % & + g , but there are differences. (a) By comparing the MBE derivations presented in the class notes and discussed in Denn, identify the source(s) of any discrepancies. (b) Show that a sign change in the definition of the momentum flux tensor (stress tensor) is sufficient to ensure agreement between the two sets of equations. [30 points]...
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