an experimental study of turbulent mixing near a density interface

Experimental study of turbulent mixing in a rectangular reactor

The velocity and concentration fields in a liquid-phase confined planar-jet reactor were measured using particle image velocimetry (PIV) and planar laser-induced fluorescence (PLIF). Measurements were taken at downstream distances from the jet splitter plates of 0, 1, 4.5, 7.5, 12, and 15 jet widths for a Reynolds number of 50,000 based on the distance between two sidewalls of the test section....

Turbulent mixing at a stable density interface: the variation of the buoyancy flux–gradient relation

Turbulent mixing of particles under tidal bores: an experimental analysis

A tidal bore develops in an estuary when the tidal range exceeds 4.5–6 m and the estuarine bathymetry amplifies the tidal wave. The bore is an abrupt rise in water depth associated with a discontinuity in velocity and pressure fields at the front. Herein the free-surface properties and the turbulent mixing of light-weight particles were investigated during the passage of tidal bores. The free-s...

An Experimental Study of Turbulent Mixing in a Tee Mixer Using PIV and PLIF

Turbulent scalar mixing in the near field of a tee mixer (transverse jet in a pipe) is studied using Particle Image Velocimetry (PIV) and Planar Laser Induced Fluorescence (PLIF). Two jet-to-pipe velocity ratios, r = 3.06 and r = 5.04, are investigated for a turbulent pipe flow at a Reynolds number of 20,850. The laser measurement techniques are described, typical flow structures in the near fi...

An experimental study of entrainment and transport in the turbulent near wake of a circular cylinder

This paper describes an experimental investigation of transport processes in the near wake of a circular cylinder a t a Reynolds number of 140000. The flow in the first eight diameters of the wake was measured using X-array hot-wire probes mounted on a pair of whirling arms. This flying-hot-wire technique increases the relative velocity component along the probe axis and thus decreases the rela...

Experimental Anechoic Chamber Measurements of a Target near an Interface

The backscattered field of an illuminated sphere with diameter ∅ = 30.5 cm above a perfect conducting plate is measured in an anechoic chamber at different heights for a varying incidence angle φ in the range 5◦ to 75◦. A high frequency field λ ∅ is transmitted, so that two significant transitions from lit to shadow regions are given over the entire incidence angle range for the considered ray ...