THE INFLUENCE OF TURBULENCE ON EROSION BY A PARTICLE-LADEN FLUID JET

被引：48
作者：
DOSANJH, S
HUMPHREY, JAC
机构：
[1] Lawrence Berkeley Lab, Materials, & Molecular Research Div,, Berkeley, CA, USA, Lawrence Berkeley Lab, Materials & Molecular Research Div, Berkeley, CA, USA
来源：
WEAR | 1985年 / 102卷 / 04期
关键词：
FLOW OF FLUIDS - Suspensions - MATERIALS TESTING - Impact - MATHEMATICAL MODELS - MATHEMATICAL TECHNIQUES - Finite Difference Method;
D O I：
10.1016/0043-1648(85)90175-9
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this study, the effects of turbulent diffusion on particle dispersion, and hence on erosion, are demonstrated numerically. Variations imposed on the level of turbulence intensity in a particle-laden jet impinging normally on a flat wall show a strong dependence of wear parameters on this quantity. Impacting particle velocities, trajectories and surface densities are predicted from lagrangian equations of motion. Eulerian equaions are used to describe fluid motion, with the turbulence viscosity evaluated from a k- epsilon model of turbulence. Non-essential complexities are avoided by assuming one-way coupling between phases and using an adjusted Stokes' drag relation. Numerical calculations reveal that the relative rate of erosion decreases and that the location of maximum wear is displaced toward the stagnation point as the turbulence intensity increases.
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页码：309 / 330
页数：22
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