Development of laser-induced capillary wave method for viscosity measurement using pulsed carbon dioxide laser

T. Oba, Y. Kido, Yuji Nagasaka

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A new experimental apparatus, based on the laser-induced capillary wave method involving the use of a pulsed carbon dioxide laser (wavelength 10.6 μm, pulse width 50 ns, power 65 mJ) as a heating source has been developed. Since the present technique is applicable to a wide range of viscosity, this method is applicable to the process in which the viscosity drastically changes within a short period of time. In this method, interfering laser beams heat a liquid surface and generate a capillary wave (the wavelength can be adjusted from 20 to 200 μm) caused by a spatially sinusoidal temperature distribution. The temporal behavior of the capillary wave is detected by a diffracted probe beam (He-Ne laser, 15 mW) at the heated area. The dynamics of the capillary wave provide information regarding thermophysical properties such as viscosity and surface tension. In the present study, several liquid samples spanning the viscosity range from 0.33 to 7080 MPa·s (e.g., acetone, toluene, 1-hexanol, ethylene glycol, JS1000, and JS14000) were investigated at room temperature. The detected signals for several liquid samples exhibiting a wide range of viscosity agree well with theoretical calculations, taking into account the influence of the distribution of surface tension.

Original languageEnglish
Pages (from-to)1461-1474
Number of pages14
JournalInternational Journal of Thermophysics
Volume25
Issue number5
DOIs
Publication statusPublished - 2004 Sep

Fingerprint

Carbon dioxide lasers
carbon dioxide lasers
capillary waves
Viscosity measurement
Pulsed lasers
Viscosity
viscosity
Lasers
lasers
Surface tension
interfacial tension
Liquids
Wavelength
Ethylene Glycol
liquid surfaces
thermophysical properties
Toluene
liquids
Acetone
Ethylene glycol

Keywords

  • Laser-induced capillary wave
  • Measurement technique
  • Surface tension
  • Viscosity

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Mechanics of Materials
  • Computational Mechanics
  • Fluid Flow and Transfer Processes
  • Physics and Astronomy (miscellaneous)

Cite this

Development of laser-induced capillary wave method for viscosity measurement using pulsed carbon dioxide laser. / Oba, T.; Kido, Y.; Nagasaka, Yuji.

In: International Journal of Thermophysics, Vol. 25, No. 5, 09.2004, p. 1461-1474.

Research output: Contribution to journalArticle

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