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Particle transport near surfaces

Reference	BBS/E/S/00000488
Principal Investigator / Supervisor	Dr Andrew Reynolds
Co-Investigators / Co-Supervisors
Institution	Silsoe Research Institute
Department	Silsoe Research Institute Department
Funding type	Research
Value (£)	107,900
Status	Completed
Type	Institute Project
Start date	01/04/2004
End date	31/10/2004
Duration	7 months

Abstract

The correct formulation of Lagrangian stochastic (LS) models for the simulation of particle trajectories in the vicinity of a flow boundary and the deposition-resuspension processes remains a formbidable challenge because of the necessity to account correctly for the influence of Reynolds number effects and the presence of coherent flow structures. It is hypothesized that second-order LS models for particle accelerations formulated into terms of a fluctuating dissipation rate capture correctly Reynolds number effects and that second-order spin (rotations of the Lagrangian acceleration vector) account correctly for the impact of coherent flow structures upon transport processes. To test these hypotheses a new class of superstatistical LS model will be formulated and then validated against the results of ongoing high precision experimental studies and direct numerical simulations of turbulent shear flows. Reynolds number and coherent flow structure dependencies will then be quantified and incorporated into conventional first-order Lagrangian stochastic models through corrections to the integral Lagrangian timescale and through improved boundary conditions.

Summary

unavailable

Committee	Closed Committee - Engineering & Biological Systems (EBS)
Research Topics	X – not assigned to a current Research Topic
Research Priority	X – Research Priority information not available
Research Initiative	X - not in an Initiative
Funding Scheme	X – not Funded via a specific Funding Scheme

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