Numerical and wind tunnel modeling on the windbreak effectiveness to control the aeolian erosion of conical stockpiles |
| |
Authors: | Almerindo D Ferreira Rosebud J Lambert |
| |
Institution: | 1.Department of Mechanical Engineering,FCTUC—University of Coimbra,Coimbra,Portugal |
| |
Abstract: | There are many industrial sites where open aggregate conical piles exist to store granular materials, like coal, industrial
residuals, or other minerals. Usually these storage piles are placed in open areas, making them susceptible to wind erosion,
which can create health, environmental, and/or economical concerns. It is common to minimize the dust emission through the
placement of windbreaks in the vicinity of the storage piles, which reduces the wind speed in the vicinity of the pile’s surface.
In this work, some experimental results from a wind tunnel study on the erosion of a conical sand pile, exposed or protected
by a fence with porosities of 0, 70, and 83%, are shown. For the sheltered cases, the windbreak was placed at several distances
from the pile’s leading edge, ranging from H to 4H, where H is the initial height of the non-eroded pile. The evolution of the shape of the sand pile is shown, at different instances
in time, and the pile deformation quantified, using a novel experimental setup developed for wind erosion studies. This information
might be regarded as a useful dataset for the benchmark of computational models aiming to produce the transient simulation
of the aeolian erosion of stockpiles. The CFD results are comprised of the modeling of several experimental scenarios. The
computational results for the surface wind velocity show a good correlation with the initial deformation of the pile. Based
on the results, the isocontours of (u
s
/u
r
) presented might be regarded as a good basis for the estimation of the pile shear velocity. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|