Project

Discipline

Density flow; Thermal convection; Particle Image Velocimetry; Refractive Index Matching; Laser-induced Fluorescence

Lead
This one-year project proposes to combine the Tomographic Particle Image Velocimetry (Tomo-PIV) and Laser-induced Fluorescence (LIF) methods and to develop an unconventional, optical, time-dependent, three-dimensional, laboratory, experimental solution of density-driven flow in porous media. This project is expecting to simultaneously extract high-resolution, three-dimensional, temperature and velocity profiles of the density-driven flow which is triggered by a given temperature gradient. This project aims at quantitatively addressing heat exchange of mixing fluids with different temperatures, characterising convection waves, and yielding a density map of the mixing fluids.
Lay summary
Dieses einjährige Projekt schlägt vor, die Methoden der Tomographischen Partikelbild-Velocimetrie (Tomo-PIV) und der Laser-induzierten Fluoreszenz (LIF) zu kombinieren und eine unkonventionelle, optische, zeitabhängige, dreidimensionale, labortechnische, experimentelle Lösung der dichtegesteuerten Strömung in porösen Medien zu entwickeln. Dieses Projekt soll die gleichzeitige Extraktion von hochauflösenden, dreidimensionalen Temperatur- und Geschwindigkeitsprofilen der dichtegetriebenen Strömung, die durch einen gegebenen Temperaturgradienten ausgelöst wird, erzeugen. Dieses Projekt zielt darauf ab, den Wärmeaustausch von sich mischenden Flüssigkeiten mit unterschiedlichen Temperaturen quantitativ zu untersuchen, Konvektionswellen zu charakterisieren und eine Dichtekarte der sich mischenden Flüssigkeiten zu erstellen.

Direct link to Lay Summary

Last update: 25.08.2020

Fluid velocity and temperature during thermal convection

Author	Kong, Xiangzhao
Publication date	30.11.2021
Persistent Identifier (PID)	10.3929/ethz-b-000516954
Repository	ETH Research Collection

This project aims at combining the Tomographic Particle Image Velocimetry (Tomo-PIV) and Laser-induced Fluorescence (LIF) methods and developing an unconventional, optical, time-dependent, three-dimensional, laboratory, experimental solution of density-driven flow in porous media. In this project, we are going to simultaneously extract high-resolution, three-dimensional, temperature and velocity profiles of the density-driven flow which is triggered by a given temperature gradient. The simultaneously-acquired velocity and temperature profiles are expected to adequately address 1) heat exchange of mixing fluids with different temperatures;2) quantitative characterization of convection waves; and3) a density map of the mixing fluids.The broader impact of this project is to1) address the fundamental questions of thermally-driven convection; 2) provide a benchmark solution for validation of numerical simulations; and3) improve the understanding of thermal convection in low- and high-enthalpy geothermal systems.