Experiments in Fluids

, Volume 46, Issue 2, pp 191–241

Digital particle image thermometry/velocimetry: a review

Review Article

DOI: 10.1007/s00348-008-0590-5

Cite this article as:
Dabiri, D. Exp Fluids (2009) 46: 191. doi:10.1007/s00348-008-0590-5

Abstract

Digital particle image thermometry/velocimetry (DPIT/V) is a relatively new methodology that allows for measurements of simultaneous temperature and velocity within a two-dimensional domain, using thermochromic liquid crystal tracer particles as the temperature and velocity sensors. Extensive research has been carried out over recent years that have allowed the methodology and its implementation to grow and evolve. While there have been several reviews on the topic of liquid crystal thermometry (Moffat in Exp Therm Fluid Sci 3:14–32, 1990; Baughn in Int J Heat Fluid Flow 16:365–375, 1995; Roberts and East in J Spacecr Rockets 33:761–768, 1996; Wozniak et al. in Appl Sci Res 56:145–156, 1996; Behle et al. in Appl Sci Res 56:113–143, 1996; Stasiek in Heat Mass Transf 33:27–39, 1997; Stasiek and Kowalewski in Opto Electron Rev 10:1–10, 2002; Stasiek et al. in Opt Laser Technol 38:243–256, 2006; Smith et al. in Exp Fluids 30:190–201, 2001; Kowalewski et al. in Springer handbook of experimental fluid mechanics, 1st edn. Springer, Berlin, pp 487–561, 2007), the focus of the present review is to provide a relevant discussion of liquid crystals pertinent to DPIT/V. This includes a background on liquid crystals and color theory, a discussion of experimental setup parameters, a description of the methodology’s most recent advances and processing methods affecting temperature measurements, and finally an explanation of its various implementations and applications.

Abbreviations

CCD

Charge-coupled device

CIE

Commission International de l’Éclairage

CLC

Cholesteric liquid crystal

CNLC

Chiral nematic liquid crystals

DPIT

Digital particle image thermometry

DPIT/V

Digital particle image thermometry/velocimetry

DPIV

Digital particle image velocimetry

HWA

Hot wire anemometry

LDA

Laser-Doppler anemometry

MTV&T

Molecular tagging velocimetry and thermometry

LIF

Laser-induced fluorescence

NTSC

National Television Systems Committee

POD

Proper orthogonal decomposition

RTD

Resistance temperature detector

TLC

Thermochromic liquid crystals

PAL

Phase altering line

SECAM

Séquentiel couleur à mémoire

NTSC

National Television Standards Committee

HSI

Hue, saturation, intensity

RGB

Red, green, blue color space

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.Department of Aeronautics and AstronauticsUniversity of WashingtonSeattleUSA