Quantum mechanics

Turbulence

Mathematics education

Materials science

Computational physics

Tracking (education)

Scattering

Pedagogy

Acoustics

Jet (fluid)

Physics

Psychology

Mathematics

Temperature measurement

Optics

Flow (mathematics)

Rayleigh scattering

Microscale chemistry

Temporal resolution

Mechanics

Optics Express

Two-dimensional, Rayleigh-scattering-based temperature measurements utilizing a turbulent jet flame were performed in this study at 100-kHz frequency. This tenfold increase in measurement speed-compared to the 10-kHz frequency considered previously-facilitated identification and tracking of several highly dynamic flow features. Findings of this study demonstrate that flow-feature dynamics become uncorrelated qualitatively and quantitatively prior to an elapse of 100 μs between successive measurements, thereby necessitating the temperature-measurement frequency to exceed 10 kHz. At the proposed 100-kHz measurement frequency, resolution of the Taylor microscale and integral scales have been demonstrated in both space and time for this flow.

Rayleigh-scattering-based two-dimensional temperature measurement at 100-kHz frequency in a reacting flow