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An automated method for analysis and visualization of laser doppler velocimetry data

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Abstract

The analysis and visualization of large data sets collected by use of laser Doppler velocimetry has presented a challenge to researchers using this technique to investigate complex flow fields. This paper describes an automated procedure for analysis and animation of two- and three-dimensional laser Doppler velocimetry data. The procedure consists of a suite of FORTRAN programs for calculating phase window averages of velocity and the Reynolds stress tensor, calculating the principal normal stresses, maximum shear stresses, and preparation of data files for input into Plot-3D compatible data visualization software. An example application of these techniques to data collected from anin vitro investigation of the retrograde flow field associated with a bileaflet mechanical heart valve is also presented.

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Abbreviations

G k i :

gate time on velocity channeli associated with samplek

\(\bar G_{ij}^k \) :

Gate time average between channelsi andj for samplek

I n 1 ,I n 2 ,I n 3 :

Binn invariants for three-dimensional principal stress calculations

SD n i :

Standard deviation for velocity channeli measurements in binn

\(\bar \sigma _{pi}^n \) :

Time averaged principal normal stress in binn

\(\bar \sigma _{pij}^n \) :

Time averaged potential maximum shear stress in binn

\(\bar \tau _{ij}^n \) :

Time averaged Reynolds stress for binn

\(\bar \tau _{Max}^n \) :

Time averaged maximum observed shear stress for binn

v i k :

Instantaneous velocity recorded on channeli for samplek

\(\bar v_i^n \) :

Time averaged channeli velocity for binn

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Authors and Affiliations

  1. Cardiovascular Fluid Mechanics Laboratory, School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA

    Jeffrey T. Ellis

  2. Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA

    Timothy M. Healy, Jeffrey T. Ellis, Arnold A. Fontaine, Christopher A. Jarrett & Ajit P. Yoganathan

  3. Cardiovascular Fluid Mechanics Laboratory, School of Chemical Engineering, Georgia Institute of Technology, 778 Atlantic Drive, 30332-0100, Atlanta, GA, U.S.A.

    Timothy M. Healy, Arnold A. Fontaine, Christopher A. Jarrett & Ajit P. Yoganathan

Authors
  1. Timothy M. Healy
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  2. Jeffrey T. Ellis
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  3. Arnold A. Fontaine
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  4. Christopher A. Jarrett
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  5. Ajit P. Yoganathan
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Healy, T.M., Ellis, J.T., Fontaine, A.A. et al. An automated method for analysis and visualization of laser doppler velocimetry data. Ann Biomed Eng 25, 335–343 (1997). https://doi.org/10.1007/BF02648047

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  • DOI: https://doi.org/10.1007/BF02648047

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