Accession Number:

ADA615925

Title:

Imaging System for Extending Evanescent-Wave Particle Velocimetry to Wall Turbulence

Descriptive Note:

Final rept. 1 Aug 2012-31 Jul 2014

Corporate Author:

GEORGIA TECH RESEARCH CORP ATLANTA

Personal Author(s):

Report Date:

2014-11-17

Pagination or Media Count:

9.0

Abstract:

This final report describes the two major pieces of equipment acquired under this DURIP grant, namely a pair of lasers and a high-speed intensified digital camera system. The equipment will be used to determine whether it is feasible to use the new evanescent wave based particle tracking velocimetry PTV technique to visualize a slice of the viscous sublayer in wall turbulence parallel to the wall in fully-developed turbulent channel flow. Understanding the characteristics of wall bounded turbulence, especially in the viscous sublayer, i.e., the thin flow region next to the wall where viscous effects dominate, is the key to understanding the drag and lift forces acting upon solid surfaces moving through a fluid.

Subject Categories:

  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE