CFD model development for sugar mill evaporators

Pennisi, Steven N., Liow, Jong-Leng, and Schneider, Philip A. (2003) CFD model development for sugar mill evaporators. In: Proceedings of the 3rd International Conference on CFD in the Minerals and Process Industries, pp. 105-110. From: 3rd International Conference on CFD in the Minerals and Process Industries, 10-12 December 2003, Melbourne, VIC, Australia.

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Abstract

A numerical model is presented for the single-phase fluid flow inside a sugar mill evaporator vessel. The model incorporates the effect of temperature and sugar concentration on the fluid properties. The model is a quarter wedge of the evaporator where the vertical heating tubes III the calandria section are modelled through a momentum source term in three directions. Although the use of the momentum source term in the calandria section did not result in fluid flow being completely restricted to the vertical direction, the predictions show reasonable agreement when compared with measurements taken from the actual vessel. The model presented here is capable of predicting trends in the fluid flow behaviour for processing conditions normally experienced in the final vessel of a multiple-effect evaporator set. The predictions show that the design of the juice distribution system at the inlet to the vessel has a major influence on the flow field in the remainder of the vessel. A large amount of mixing was found to occur at the inlet resulting in the calandria region being exposed to juice with properties close to the outlet stream, which is detrimental to performance.

Item ID: 7760
Item Type: Conference Item (Refereed Research Paper - E1)
Keywords: CFD; fluid flow; sugar evaporators; sugar mills
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ISBN: 978-0-643-09038-X
Date Deposited: 22 Jul 2010 03:37
FoR Codes: 09 ENGINEERING > 0914 Resources Engineering and Extractive Metallurgy > 091499 Resources Engineering and Extractive Metallurgy not elsewhere classified @ 100%
SEO Codes: 86 MANUFACTURING > 8611 Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) > 861199 Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) not elsewhere classified @ 100%
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