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.
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December 1996
Research Papers
Obstruction of Pipelines During the Flow of Waxy Crude Oils
Paulo R. Souza Mendes,
Paulo R. Souza Mendes
Department of Mechanical Engineering, Pontifi´cia Universidade Cato´lica, Rio de Janeiro, RJ 22453-900, Brazil
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Sergio L. Braga
Sergio L. Braga
Department of Mechanical Engineering, Pontifi´cia Universidade Cato´lica, Rio de Janeiro, RJ 22453-900, Brazil
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Paulo R. Souza Mendes
Department of Mechanical Engineering, Pontifi´cia Universidade Cato´lica, Rio de Janeiro, RJ 22453-900, Brazil
Sergio L. Braga
Department of Mechanical Engineering, Pontifi´cia Universidade Cato´lica, Rio de Janeiro, RJ 22453-900, Brazil
J. Fluids Eng. Dec 1996, 118(4): 722-728 (7 pages)
Published Online: December 1, 1996
Article history
Received:
December 13, 1995
Revised:
September 5, 1996
Online:
January 22, 2008
Citation
Souza Mendes, P. R., and Braga, S. L. (December 1, 1996). "Obstruction of Pipelines During the Flow of Waxy Crude Oils." ASME. J. Fluids Eng. December 1996; 118(4): 722–728. https://doi.org/10.1115/1.2835501
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