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Title: Fluid dynamics of double diffusive systems

A study of mixing processes in doubly diffusive systems is being conducted. Continuous gradients of two diffusing components (heat and salinity in our case) are being used as initial conditions, and forcing is introduced by lateral heating and surface shear. The goals of the proposed work include: (1) quantification of the effects of finite amplitude disturbances on stable, double diffusive systems, particularly with respect to lateral heating, (2) development of an improved understanding of the physical phenomena present in wind-driven shear flows in double diffusive stratified environments, (3) increasing our knowledge-base on turbulent flow in stratified environments and how to represent it, and (4) formulation of a numerical code for such flows. The work is being carried out in an experimental facility which is located in the Stanford Environmental Fluid Mechanics Laboratory, and on laboratory minicomputers and CRAY computers. In particular we are focusing on the following key issues: (1) the formation and propagation of double diffusive intrusions away from a heated wall and the effects of lateral heating on the double diffusive system; (2) the interaction between the double diffusively influenced fluxes and the turbulence induced fluxes; (3) the measurement of heat and mass fluxes; and (4) the influencemore » of double diffusive gradients on mixed layer deepening. 1 fig.« less
Authors:
Publication Date:
OSTI Identifier:
5990095
Report Number(s):
DOE/ER/13757-T3
ON: DE92003432
DOE Contract Number:
FG03-87ER13757
Resource Type:
Technical Report
Research Org:
Stanford Univ., CA (United States). Terman Engineering Center
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; FLUID MECHANICS; RESEARCH PROGRAMS; ANEMOMETERS; COMPUTERIZED SIMULATION; DIFFUSION; MIXING; NUMERICAL SOLUTION; PROGRESS REPORT; THERMAL DIFFUSIVITY; DOCUMENT TYPES; MEASURING INSTRUMENTS; MECHANICS; PHYSICAL PROPERTIES; SIMULATION; THERMODYNAMIC PROPERTIES 665000* -- Physics of Condensed Matter-- (1992-); 990200 -- Mathematics & Computers