Conference Proceedings

Direct Numerical Simulation of Confined Wall Plumes

Nitheesh George, J Philip, A Ooi

Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018 | Australian fluid mechanics society | Published : 2018

Abstract

We present results from the direct numerical simulation (DNS) of a wall attached thermal plume in a confined box. The plume originates from a local line heat source of length, L, placed at the bottom left corner of the box. The Reynolds number of the wall plume, based on box height and buoyant velocity scale, is ReH = 14530 and a parametric study is carried out for boxes of two different aspect ratios (ratio of box width to box height) for a particular value of L. In the simulation, the plume develops along the vertical side wall while remaining attached to it before spreading across the top wall to form a buoyant fluid layer and eventually moving downwards and filling the whole box. Further..

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Funding Acknowledgements

The authors would like to gratefully acknowledge the financial support of the Bushfire and Natural Hazards Cooperative Research Centre as well as Australian Research Council. This work was also supported by resources provided by the Pawsey Supercomputing Centre with funding from the Australian Government and the Government of Western Australia.