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
      Inorganic Chemistry
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE