Using computational fluid dynamics in combating erosion-corrosion

Nesic, Srdjan (2006) Using computational fluid dynamics in combating erosion-corrosion. Chemical Engineering Science, 61 12: 4086-4097. doi:10.1016/j.ces.2006.01.052

Author Nesic, Srdjan
Title Using computational fluid dynamics in combating erosion-corrosion
Journal name Chemical Engineering Science   Check publisher's open access policy
ISSN 0009-2509
Publication date 2006
Sub-type Article (original research)
DOI 10.1016/j.ces.2006.01.052
Volume 61
Issue 12
Start page 4086
End page 4097
Total pages 12
Editor A. Bell
Place of publication Oxford
Publisher Pergamon-Elsevier Science Ltd
Collection year 2006
Language eng
Subject C1
291801 Fluidization and Fluid Mechanics
780102 Physical sciences
Abstract Computational fluid dynamics was used to search for the links between the observed pattern of attack seen in a bauxite refinery's heat exchanger headers and the hydrodynamics inside the header. Validation of the computational fluid dynamics results was done by comparing then with flow parameters measured in a 1:5 scale model of the first pass header in the laboratory. Computational fluid dynamics simulations were used to establish hydrodynamic similarity between the 1:5 scale and full scale models of the first pass header. It was found that the erosion-corrosion damage seen at the tubesheet of the first pass header was a consequence of increased levels of turbulence at the tubesheet caused by a rapidly turning flow. A prismatic flow corrections device introduced in the past helped in rectifying the problem at the tubesheet but exaggerated the erosion-corrosion problem at the first pass header shell. A number of alternative flow correction devices were tested using computational fluid dynamics. Axial ribbing in the first pass header and an inlet flow diffuser have shown the best performance and were recommended for implementation. Computational fluid dynamics simulations have revealed a smooth orderly low turbulence flow pattern in the second, third and fourth pass as well as the exit headers where no erosion-corrosion was seen in practice. This study has confirmed that near-wall turbulence intensity, which can be successfully predicted by using computational fluid dynamics, is a good hydrodynamic predictor of erosion-corrosion damage in complex geometries. (c) 2006 Published by Elsevier Ltd.
Keyword computational fluid dynamics
Tube Heat-exchangers
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
2007 Higher Education Research Data Collection
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 15 Aug 2007, 09:27:25 EST