Low-Reynolds-number flow of a second-order fluid past a porous sphere

P. D. Verma, N. C. Sacheti

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The conversion of energy from a laser-generated heat pulse to an acoustic wave in a liquid is considered in detail. In particular, the development of finite and large amplitude pressure waves is treated with the help of a table of state functions for the liquid. Optical saturation is included in the numerical computation and shown to produce increased depth of heating in the dye. Saturation generally decreases the peak pressure and increases the pulse width. An exception is the case when the optical wave saturates the dye and penetrates it with a velocity near Mach one. In this case, pressure amplitude grows with increasing laser pulse penetration. Calculations are carried out for plane, cylindrical, and spherical geometries. Experimental comparisons with calculations are made for the free-surface boundary condition and there is a good agreement.

Original languageEnglish
Pages (from-to)2065-2069
Number of pages5
JournalJournal of Applied Physics
Volume46
Issue number5
DOIs
Publication statusPublished - 1975

Fingerprint

low Reynolds number
fluids
dyes
saturation
liquids
pulses
elastic waves
lasers
pulse duration
penetration
boundary conditions
heat
heating
acoustics
geometry
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Cite this

Low-Reynolds-number flow of a second-order fluid past a porous sphere. / Verma, P. D.; Sacheti, N. C.

In: Journal of Applied Physics, Vol. 46, No. 5, 1975, p. 2065-2069.

Research output: Contribution to journalArticle

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