Accession Number : ADA299690
Title : Novel Diagnostics for the Study of Mixing and Chemical Reactions in Turbulent Liquid Phase Flows.
Descriptive Note : Final technical rept. 1 Jul 92-30 Jun 95,
Corporate Author : MICHIGAN STATE UNIV EAST LANSING
Personal Author(s) : Koochesfahani, Mahoochehr M.
PDF Url : ADA299690
Report Date : 25 AUG 1995
Pagination or Media Count : 16
Abstract : Significant advances were made in the technology of molecular tagging diagnostics. Taking advantage of recently engineered water-soluble molecular complexes with long-lived excited states (i.e. phosphorescence), techniques were developed for non-intrusive, multi-point, measurements of various fluid dynamical quantities. As a result of two novel innovations, the single-point accuracy of velocity measurements was improved by about a factor of 5, while the density of measurement points in a plane was increased by an order of magnitude. It was demonstrated that the same chemical compound used for velocimetry could be utilized to molecularly tag either a chemical reaction interface between two streams, or a passive scalar (non-reacting) mixing region, and monitor the Lagrangian evolution of the tagged regions. This development offers the capability for simultaneous velocity and scalar mixing measurements. The technique has now reached a sufficient level of maturity that it can be applied to the study of various flows. jg p.1
Descriptors : *MEASUREMENT, *TURBULENT FLOW, *LIQUID PHASES, *CHEMICAL REACTIONS, *DIAGNOSTIC EQUIPMENT, VELOCITY, DENSITY, INTERFACES, QUANTITY, PASSIVE SYSTEMS, EVOLUTION(GENERAL), MIXING, SYNCHRONISM, SCALAR FUNCTIONS, FLUID DYNAMICS, WATER SOLUBLE MATERIALS, CHEMICAL COMPOUNDS, LABELED SUBSTANCES, LAGRANGIAN FUNCTIONS, MOLECULAR COMPLEXES, PHOSPHORESCENCE.
Subject Categories : Physical Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE