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Computation 2018, 6(1), 2; doi:10.3390/computation6010002

Temporal Variation of the Pressure from a Steady Impinging Jet Model of Dry Microburst-Like Wind Using URANS

1
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
2
Energy Research Institute (ERI@N), 1 CleanTech Loop, #06-04, CleanTech One, Singapore 637141, Singapore
*
Author to whom correspondence should be addressed.
Received: 16 November 2017 / Revised: 20 December 2017 / Accepted: 28 December 2017 / Published: 5 January 2018
(This article belongs to the Special Issue Computational Methods in Wind Engineering)
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Abstract

The objective of this study is to investigate the temporal behavior of the pressure field of a stationary dry microburst-like wind phenomenon utilizing Unsteady Reynolds-averaged Navier-Stokes (URANS) numerical simulations. Using an axisymmetric steady impinging jet model, the dry microburst-like wind is simulated from the initial release of a steady downdraft flow, till the time after the primary vortices have fully convected out of the stagnation region. The validated URANS results presented herein shed light on the temporal variation of the pressure field which is in agreement with the qualitative description obtained from field measurements. The results have an impact on understanding the wind load on structures from the initial touch-down phase of the downdraft from a microburst. The investigation is based on CFD techniques, together with a simple impinging jet model that does not include any microphysical processes. Unlike previous investigations, this study focuses on the transient pressure field from a downdraft without obstacles. View Full-Text
Keywords: microburst; impinging jet; unsteady reynolds-averaged navier-stokes; pressure field microburst; impinging jet; unsteady reynolds-averaged navier-stokes; pressure field
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Skote, M.; Sim, T.S.; Srikanth, N. Temporal Variation of the Pressure from a Steady Impinging Jet Model of Dry Microburst-Like Wind Using URANS. Computation 2018, 6, 2.

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