hw8 - S09 - Chemical Engineering 150A Spring Semester, 2009...

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R H z r Jet of fluid A fluid B Chemical Engineering 150A Spring Semester, 2009 Homework 8: Microscopic Balances Problem 1 Problem 9.1 in Process Fluid Mechanics Problem 2 A jet of fluid A is cooled by passing it through a bath of a second fluid whose temperature is externally controlled. Fluid B is contained in a cylindrical vessel of radius R, sealed at z=0 and z=H. The jet of fluid A (which is immiscible with B) is pumped in at the top of the cylinder and exits at the base. Only fluid A enters and leaves the vessel, and the jet has a constant radius R j . Fluid B recirculates within the vessel due to the motion of fluid A. Neglecting any heat transfer or thermal effects, indicate how you would solve for the velocity field in fluid B. Note that H is comparable in magnitude to R. Problem 3 You want to use a less powerful pump to transport fluid A through a pipe. A colleague suggests including a thin layer of lower-viscosity fluid ( α <1), fluid B, flowing in an annular ring of thickness
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This note was uploaded on 02/05/2010 for the course CHEM 150A taught by Professor Muller during the Spring '10 term at University of California, Berkeley.

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hw8 - S09 - Chemical Engineering 150A Spring Semester, 2009...

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