Simulating Turbulent Air Flow Past aHemispherical Body
DOI:
https://doi.org/10.17159/2309-8988/2021/v37a10Keywords:
hemisphere, wind tunnel, turbulence modelling, computational fluid dynamics, steady flowAbstract
The flow of air past a smooth surface-mounted hemisphere is investigated numerically using six common RANS turbulence models and seeking steady flow solutions. Where possible, the turbulence models are applied using standard wall functions, resolving the viscous sublayer, and the enhanced wall treatment option in ANSYS Fluent. Results of the simulations are compared against measurements taken in a wind tunnel experiment. The comparison shows that enhanced wall treatment and resolving the boundary layer on a low Reynolds number mesh yields superior accuracy compared to standard wall functions or resolving the boundary layer on a high Reynolds number mesh, for all the turbulence models considered.
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Copyright (c) 2021 M.R. Meas, J.F. Bruwer, M.L. Combrinck, T.M. Harms (Author)
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