scholarly journals Three-dimensional numerical simulation of a vortex ring impacting a bump

2014 ◽  
Vol 4 (3) ◽  
pp. 032004 ◽  
Author(s):  
Heng Ren ◽  
Changyue Xu
Keyword(s):  
Numerical Simulation ◽  
Vortex Ring ◽  
Three Dimensional

Numerical Simulation for the Collision of a Vortex Ring With Solid Particles

2007 ◽  
Author(s):  
Hisanori Yagami ◽  
Tomomi Uchiyama
Keyword(s):  
Numerical Simulation ◽  
Vortex Ring ◽  
Large Scale ◽  
Vortical Structure ◽  
Three Dimensional ◽  
Solid Particles ◽  
Convective Velocity ◽  
Centrifugal Effect ◽  
Small Glass ◽  
Induced Velocity

This study is concerned with the numerical simulation of the collision between a vortex ring and an ensemble of small glass particles. The vortex ring, convecting with the self-induced velocity in a quiescent air, collides with the particles. The Reynolds number for the vortex ring is 2600, and the particle diameters are 50 and 200μm. Immediately after the collision with the vortex ring, the 50μm particles surround the vortex ring, forming a dome. The 200μm particles disperse more due to the collision with the vortex ring. This is attributable to the centrifugal effect of the large-scale eddy. The collision between the vortex ring and the particles induces an organized three-dimensional vortical structure inside the vortex ring. It also reduces the strength of vortex ring and the convective velocity.

scholarly journals Blowing and drifting snow in Alpine terrain: numerical simulation and related field measurements

1998 ◽  
Vol 26 ◽  
pp. 174-178 ◽  
Author(s):  
Peter Gauer
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Three Dimensional ◽  
Field Measurements ◽  
Blowing Snow ◽  
Related Field ◽  
Drifting Snow ◽  
Physically Based ◽  
Snow Transport

A physically based numerical model of drifting and blowing snow in three-dimensional terrain is developed. The model includes snow transport by saltation and suspension. As an example, a numerical simulation for an Alpine ridge is presented and compared with field measurements.

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