The Effect of Particle Size on Acceleration Measurements in a Turbulent Flow
Document
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.
Item Description
Name(s)
Author: Brown, Rachel Diane
Thesis advisor: Voth, Greg A.
Date
May 01, 2008
Extent
30 pages
Language
eng
Genre
Physical Form
electronic
Discipline
Rights and Use
In Copyright – Non-Commercial Use Permitted
Digital Collection
PID
ir:1843