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RESEARCH PAPERS

Obstruction of Pipelines During the Flow of Waxy Crude Oils

[+] Author and Article Information
Paulo R. Souza Mendes, Sergio L. Braga

Department of Mechanical Engineering, Pontifícia Universidade Católica, Rio de Janeiro, RJ 22453-900, Brazil

J. Fluids Eng 118(4), 722-728 (Dec 01, 1996) (7 pages) doi:10.1115/1.2835501 History: Received December 13, 1995; Revised September 05, 1996; Online January 22, 2008

Abstract

When a liquid solution is cooled as it flows laminarly through a tube, a radial concentration gradient is established, which causes mass transfer of the solute to occur toward the tube wall. The solute precipitates off the solution in the neighborhood of the wall, and adheres perfectly to it. The deposited mass gradually obstructs the conduit, affecting the pressure and flow fields. A simple model is presented that gives the thickness of the deposited layer as a function of axial position and time. The liquid solution is assumed to behave according to the Herschel-Bulkley rheological model. Results are presented in the form of time evolution of axial distributions of pressure, temperature, layer thickness, global heat transfer coefficient and Reynolds number.

Copyright © 1996 by The American Society of Mechanical Engineers
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