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National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
The methodology of the evaluation of the dissemination of dust in the complicated terrain after the dust-proof walls
 Nosek, Štěpán ; Jaňour, Zbyněk
The report describes the methodology for the assessment of the spread of coal dust from surface mine in the complicated terrain after the dust-proof walls. First, the methodology is described that uses physical modeling, specifically the so-called Townsend´s method of independence on Reynolds ' number is applied. The methodology is applied to the case of the spread of dust from the surface of the coal mine Libouš in the case where a substantial source of pollution in the vicinity is located the dust-proof wall and the diffusion of dust particles is studied in the immediate vicinity of the source. After the configuration of set up of the wind tunnel that simulates flow in MVA in the scale, was made the measurement of turbulent characteristics of flow and diffusion, and was designed by its optimal configuration. The results were compared with the results of the SW.
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The methodology of the evaluation of the dissemination of dust in the complicated terrain after the implementation of the major topographical changes
 Nosek, Štěpán ; Jaňour, Zbyněk
The report describes the methodology for the assessment of the spread of coal dust from surface mine in the complicated terrain. First, the methodology is described that uses physical modeling, specifically the Townsend´s method is applied the so-called independence on Reynolds ' number. The methodology is applied to the case of the dissemination of coal dust from surface mine in the configuration Libouš, which occurs after the planned extraction in the year 2024. For this the planned configuration is designed and manufactured plastic model. After the configuration settings of the wind tunnel that simulates flow measurement was carried out in the MVA of turbulent characteristics of flow and diffusion. With the help of these results is a validated mathematical model.
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The methodology of the evaluation of the dissemination of dust in the complicated terrain with area source
 Nosek, Štěpán ; Jaňour, Zbyněk
The report describes the methodology for the assessment of the spread of coal dust from surface mine in the complicated terrain, first described the methodology, which uses the method of physical modelling. For an estimate of the area of the most important processes is used, the method of similarity between laminar and turbulent flow. In this area, the Townsendova method is applied the so-called independence on Reynolds ' number. The methodology is applied to the case of the dissemination of coal dust from surface mine and Libouš selected results of flow and diffusion. Are discussed the shortcomings of the methodology of SYMOS, which is used for these cases and the rationale for the proposed methodology. With the help of these results is a validated mathematical model
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