A “large‐eddy” approach to acoustic remote sensing of turbulent kinetic energy dissipation rate ϵ

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Abstract
This paper suggests that a “large‐eddy” technique may be used to determine ϵ, the rate of dissipation of turbulent kinetic energy per unit mass, from measurements of the largest energy‐containing scales of the turbulent velocity field. The suggestion has been examined using vertical velocity data from a narrow‐beam acoustic Doppler profiler and also direct measurements of ϵ (using airfoil probes) from a microscale profiler. Initial results are encouraging, rasing the possibility of simultaneously measuring space/time continuous fields of “mean” velocity, turbulent velocity and ϵ with near‐standard acoustic Doppler techniques.

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