Combined Shadowgraphy and PLIF for dynamical and thermal characterization of fluids

• Grant number: 22/06199-2
• Support Opportunities: Multi-user Equipment Program
• Start date: July 01, 2022
• End date: June 30, 2029
• Field of knowledge: Engineering - Mechanical Engineering - Transport Phenomena
• Principal Investigator: Arthur Vieira da Silva Oliveira
• Grantee: Arthur Vieira da Silva Oliveira
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• City of the host institution: São Carlos
• Associated research grant: 21/01897-0 - Experimental study of droplets impact onto heated walls using combined optical techniques: single droplets, multiple droplets and sprays, AP.JP

Abstract

Equipment for dynamic and thermal characterization of fluids using Shadowgraphy and Planar Laser-Induced Fluorescence (PLIF) techniques. The first technique allows measurements of shape, size and velocity (through double pulses like the PIV technique), while the second allows measurements of the temperature field by the ratio of the light intensity of two different spectral bands. The budgeted equipment was directed to studies of drops and sprays with the following characteristics: droplet diameters between 50 and 2000 microns, droplet velocities from 0 to 50 m/s, and field of view from 12 x 12 mm2 to 25 x 25 mm2. Despite designing the equipment for droplet studies, these techniques can also measure processes involving jets, boiling, multiphase flows, mixtures of components, and others. Furthermore, these techniques can also work simultaneously with an infrared camera for measuring the temperature of the surface involved in the process and with another high-speed camera for any other measurement, such as using the Total Internal Reflection technique for measuring the solid-fluid contact area. (AU)