Publication Date

5-1-2008

Advisor(s)

Voth, Greg A.

Major

Physics

Language

English

Abstract

We measure the accelerations of large neutrally buoyant particles (0.4 < d/c < 15) at Reynolds numbers of Rf = 400, 720. We present acceleration variance data which decreases with particle size, in very good agreement with the d-2/3 prediction obtained from a model which terminates the energy cascade at the size of the particles. In addition, we report that PDFs derived from this data display no significant particle size dependence. We also present a new method for determining particle size during data analysis, and suggest a possible derivation of the functional form for the transition from small to large particle behavior in neutrally buoyant particles from the pressure structure function.

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