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Numerical Modelling of Air Flow Through a Pocketed Duct with Application to Natural Ventilated Architectural Buildings

Kelvin K. L., Wong, Jagannath Mazumdar


Numerical modelling of air flow through a duct with an extended pocket is examined to study the effect of integrating structural pockets into air channels for a more efficient natural ventilation of architectural facilities. In this research, air flow along the hallway or corridor of a building has been represented by a numerical model that assumes non-Newtonian flow through a rigid walled duct with a pocket for capturing of moving air. Equations describing the improvement in efficiency of air channel into a duct with different dimensional configurations of the structural pockets are formulated. This is a representation of the degree of ventilation. The variations in ventilation subjected to alterations in structural height and length as well as pocket curvature are displayed in three-dimensional graphs. In this paper, the mathematical models of fluid transport have been briefly surveyed in the applied mathematics community in relation to fluid dynamics vis-à-vis resistance of flow through rigid walled
ducts. A Power Law model for an air channel of rectangular uniformity and integrated with a pocket is constructed to examine the flow properties for different structural configurations. Useful deductions for the design of the channel are made based on this numerical model.


Natural ventilation, Structural pocket, Non-Newtonian flow, Power Law Model, Resistance to flow, Efficiency of air channelling, Degree of ventilation

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