Estimation models were developed, which can be used to calculate the flow rate close to the face of the empty heading for different settings of the system variables studied. The diameter of the duct, duct mouth to face distance, and the power of the fan (quantity delivered by the fan) were varied and their effect on ventilation determined through a comparative analysis of the flow rates calculated close to the face of the heading. The effect of some of the system variables in forcing and exhausting ducted fan systems on ventilation in an empty heading was investigated using computational fluid dynamics(CFD) and comparative analyses. School of Mining Engineering, University of the Witwatersrand, South Africa Analysis of the effect of ducted fan system variables on ventilation in an empty heading using CFD
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