Bibliographic Details
| Title: |
Three-dimensional modeling of fugitive dust dispersion in idealized openpit mines. |
| Authors: |
Bhowmick, T., Raj, K. V., Bandopadhyay, S.1 |
| Source: |
Mining Engineering. Oct2015, Vol. 67 Issue 10, p45-52. 8p. |
| Subjects: |
Fugitive emissions, Three-dimensional imaging, Dispersion (Chemistry), Strip mining, Navier-Stokes equations, Computational fluid dynamics |
| Abstract (English): |
The control of fugitive dust in high-latitude openpit mines is challenging due to unique atmospheric phenomena resulting in complicated flow regimes as well as atmospheric inversion due to the lack of adequate insolation during prolonged winter seasons. In this study, two idealized (one conical and one trapezoidal) three-dimensional openpit mine geometries were simulated for different seasonal conditions using a computational-fluid-dynamics package from Software Cradle. The airflow was solved by Reynolds-averaged Navier-Stokes equations using the standard kappa-epsilon turbulence model. The concept of particle tracking was used to predict the flow patterns of dust particles. For various climatic conditions and two different pit geometries, fugitive dust particles varying in size, from PM0.1 to PM10, and concentration were generated at various locations and dispersed by the airflows inside the openpit mine. The amount and location of dust particles inside the pit were reported at various time intervals. In the summer season, airborne dust particles were quickly transported outside the openpit domain. In the winter season, however, the development of atmospheric inversion significantly affected the amount of dust retention inside the openpit domain. [ABSTRACT FROM AUTHOR] |
| Abstract (Spanish): |
El control de polvo fugitivo en minas a tajo abierto en latitudes elevadas es desafiante debido a fenomenos atmosfericos propios de esas regiones que resultan en regimenes de flujo complicados, as(como inversiones atmosfericas por causa de falta de una adecuada insolacion en temporadas invernales prolongadas. En este estudio se realizo una simulacion idealizada (una conica y la otra trapezoidal) de geometrias tridimensionales de minas a tajo abierto para diferentes condiciones estacionales usando un paquete de mecanica de fluidos computacional (CFD por sus siglas en ingles) de Software Cradle. El flujo de aire fue resuelto por ecuaciones de Navier-Stokes con el promedio de Reynolds usando el modelo estandar de turbulencia kappa-epsilon. Se uso el concepto de rastreo de partlculas con el fin de predecir los patrones de flujo de partlculas de polvo. Con el fin de ver los efectos en diferentes condiciones climaticas y en dos geometrias de tajos diferentes se generaron partlculas de polvo fugitivo de diferente tamano, de PM01 a PM10, y en diferentes concentraciones en distintos lugares y se dispersaron mediante flujos de aire al interior de la mina abierta. Se reporto la cantidad y ubicacion de partlculas de polvo dentro de la mina en diferentes intervals de tiempo. En la temporada de verano, las partlculas de polvo en el aire fueron rapidamente transportadas fuera del area del tajo abierto de la mina. Sin embargo, en el invierno, la inversion atmosferica afecto de manera significativa la cantidad de retencion de polvo dentro del area del tajo abierto. [ABSTRACT FROM AUTHOR] |
|
Copyright of Mining Engineering is the property of Society for Mining, Metallurgy, & Exploration, Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Engineering Source |
