The developing brownout cloud beneath a hovering microrotor is simulated using a hybrid free-vortex method-unsteady Reynolds-averaged Navier-Stokes solver coupled with a Lagrangian sediment-tracking algorithm. The present work attempts to examine the capabilities of a high-fidelity computational fluid dynamics analysis together with a sediment-tracking algorithm to analyze the evolution of brownout clouds. Both the single-phase and dual-phase flowfields are simulated and compared to available experimental data. The variation of the phenomenological attributes of the cloud evolution as a function of particle size was analyzed and found to agree with experimental evidence. To enable fast single-desktop simulations, all components of this methodology are designed to run on double-precision, programmable graphics processing units. This hybrid implementation uses a multigranular parallel approach to demonstrate significant performance gains over equivalent single-core central processing unit simulations even when computations involve the solution of sparse implicit systems. Presented as Paper 2013-2853 at the 21st AIAA Computational Fluid Dynamics Conference, San Diego, CA, 24-27 June 2013
Modeling the Two-Phase Flowfield Beneath a Hovering Rotor on Graphics Processing Units
AIAA journal ; 53 , 8
2015
Aufsatz (Zeitschrift)
Englisch
A Hybrid CFD Methodology to Model the Two-phase Flowfield beneath a Hovering Laboratory Scale Rotor
British Library Conference Proceedings | 2012
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