University of Illinois Urbana-Champaign

Whole-field measurement of temperature in water using two-color laser- induced fluorescence

Sakakibara, Jun; Adrian, Ronald J.

Permalink

https://hdl.handle.net/2142/112568

Description

Title
Whole-field measurement of temperature in water using two-color laser- induced fluorescence
Author(s)
  • Sakakibara, Jun
  • Adrian, Ronald J.
Issue Date
1997-10
Keyword(s)
  • Two-color Laser Induced Fluorescence
  • Temperature Measurement
Abstract
A technique is described that measures the instantaneous three-dimensional temperature distribution of water using two-color laser-induced fluorescence (LIF). Two fluorescent dyes, Rhodamine Band Rhodamine 110, are used as temperature indicators. A laser light sheet scanned across the entire measurement volume excites the fluorescent dye, and an optical system involving a color beam splitter gives the intensity distribution of the individual fluorescent dyes on two separate monochrome CCD cameras. The ratio of these fluorescence intensities at each point of the image is calibrated against the temperature to eliminate the effect of the fluctuation of illuminating light intensity. A stable thermally stratified layer was measured by this system to evaluate the total accuracy of the measurement system. The random error of the measurement was ±l.4K with 95% confidence. Measurements of thermal convection over a heated horizontal surface show temperature isosurfaces having typical structures such as plumes, ridges and thermals.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 864
  • 1997-6025
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112568
Sponsor(s)/Grant Number(s)
National Science Foundation 97/10 ATM 95 2266 97/10
Copyright and License Information
Copyright 1997 Board of Trustees of the University of Illinois

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Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.