The Mathematical Institute, University of Oxford, Eprints Archive

An experimental and theoretical investigation of particle–wall impacts in a T-junction

Vigolo, D. and Griffiths, I. M. and Radl, S. and Stone, H. A. (2012) An experimental and theoretical investigation of particle–wall impacts in a T-junction. Journal of Fluid Mechanics . (Submitted)

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Abstract

Understanding the behaviour of particles entrained in a fluid flow upon changes in flow direction is crucial in problems where particle inertia is important, such as the erosion process in pipe bends.We present results on the impact of particles in a T-shaped channel in the laminar-turbulent transitional regime. The impacting event for a given system is described in terms of the Reynolds number and the particle Stokes number. Experimental results for the impact are compared with the trajectories predicted by theoretical particle tracing models for a range of configurations to determine the role of the viscous boundary layer in retarding the particles and reducing the rate of collision with the substrate. In particular a 2D model based on a stagnation point flow is used together with 3D numerical simulations. We show how the simple 2D model provides a tractable way of understanding the general collision behaviour, while more advanced 3D simulation can be helpful in understanding the details of the flow.

Item Type:Article
Subjects:D - G > General
Research Groups:Oxford Centre for Collaborative Applied Mathematics
ID Code:1642
Deposited By: Peter Hudston
Deposited On:05 Jan 2013 10:27
Last Modified:29 May 2015 19:20

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