Reverse osmosis issues relating to pressure drop, mass transfer, turbulence, and unsteadiness

G. Srivathsan, Eph M. Sparrow, John M. Gorman

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Numerical simulation has been used to investigate a number of significant physical processes for reverse osmosis in a spiral-wound membrane, including fluid-flow regimes, flow unsteadiness, and fluid-flow periodicity. The independent variables included the feed spacer strand angle, feed spacer thickness, inter strand spacing, strand radius, radius of the center cylinder, and Reynolds number. Results extracted from the numerical solutions were post-processed to provide algebraic correlations for both the dimensionless pressure drop and the Sherwood number. For the range of Reynolds numbers relevant to practice, turbulence was found to be nonexistent. Flow unsteadiness was identified for certain ranges of the Reynolds number and the geometrical parameters. The extent of the unsteadiness was sufficiently moderate so as not to have any practical effect on the dimensionless pressure drop and Sherwood number. Fluid-flow periodicity was verified.

Original languageEnglish (US)
Pages (from-to)83-86
Number of pages4
JournalDesalination
Volume341
Issue number1
DOIs
StatePublished - May 15 2014

Fingerprint

Reverse osmosis
pressure drop
Reynolds number
Pressure drop
fluid flow
Flow of fluids
mass transfer
Turbulence
Mass transfer
turbulence
periodicity
spacing
membrane
Membranes
Computer simulation
simulation
reverse osmosis

Keywords

  • Dimensionless pressure drop
  • Reverse osmosis
  • Sherwood number
  • Spiral wound
  • Turbulence
  • Unsteadiness

Cite this

Reverse osmosis issues relating to pressure drop, mass transfer, turbulence, and unsteadiness. / Srivathsan, G.; Sparrow, Eph M.; Gorman, John M.

In: Desalination, Vol. 341, No. 1, 15.05.2014, p. 83-86.

Research output: Contribution to journalArticle

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