The evolution of planar and axisymmetric yield / power-law jets

Ijaz H. Jafri, George Vradis

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The evolution of a steady, incompressible, non-isothermal submerged jet of a non-Newtonian yield/power-law fluid jet is studied using a numerical solution of the governing boundary layer equations. Emphasis is placed in studying the effects of the governing non-dimensional flow parameters i.e. the yield number, power-law index, and Prandtl number. Both yield-pseudoplastic and yield-dilatant fluids are studied for planar and axisymmetric geometries. Decay histories of the jet's center-line velocity and temperature as well as the spread of the half-width of the jets are obtained. These results show that the jet evolution, as described by the decay of the centerline velocity and evolution of the jet's half-width, becomes independent of the power-law index at higher yield numbers. The jet expansion boundary is concave to the jet-axis for all values of the power-law index for fluids that exhibit a yield stress. Moreover, the results depict the near independence of the decay of the centerline temperature from the power-law index. Also, it is established that for fluids exhibiting yield, mixing is much more rapid as compared to that of yield-stress free fluids.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
Pages27-32
Number of pages6
Volume217
StatePublished - 1996

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Fluids
Yield stress
Plant expansion
Prandtl number
Boundary layers
Temperature
Geometry

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Jafri, I. H., & Vradis, G. (1996). The evolution of planar and axisymmetric yield / power-law jets. In American Society of Mechanical Engineers, Applied Mechanics Division, AMD (Vol. 217, pp. 27-32)

The evolution of planar and axisymmetric yield / power-law jets. / Jafri, Ijaz H.; Vradis, George.

American Society of Mechanical Engineers, Applied Mechanics Division, AMD. Vol. 217 1996. p. 27-32.

Research output: Chapter in Book/Report/Conference proceedingChapter

Jafri, IH & Vradis, G 1996, The evolution of planar and axisymmetric yield / power-law jets. in American Society of Mechanical Engineers, Applied Mechanics Division, AMD. vol. 217, pp. 27-32.
Jafri IH, Vradis G. The evolution of planar and axisymmetric yield / power-law jets. In American Society of Mechanical Engineers, Applied Mechanics Division, AMD. Vol. 217. 1996. p. 27-32
Jafri, Ijaz H. ; Vradis, George. / The evolution of planar and axisymmetric yield / power-law jets. American Society of Mechanical Engineers, Applied Mechanics Division, AMD. Vol. 217 1996. pp. 27-32
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