Development of a Flow Visualization Technique for Transient Fluid Flow
Abstract
This document describes a quantitative flow visualization technique for transient fluid flow. The flow visualization technique uses particle image velocimetry to obtain instantaneous global measurements of the fluid flow field. The particles in the flow field are illuminated with a multiple pulsed laser sheet, and the image of the illuminated particles is then captured on film. The film is digitized on a high resolution scanner, and the digital data are sent to a computer system where either an autocorrelation code or a two-dimensional fast Fourier transform code is sequentially applied to small regions of the digitized picture to compute the average displacement of the particles in each region. Knowing the time between laser pulses allows the velocity vector for each region to be calculated from the displacement data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1992
- Accession Number
- ADA634292
Entities
People
- Kenneth M. Lapointe
Organizations
- Naval Undersea Warfare Center