Title: RANS simulation of wind pressure development on mono-slope canopy roofs

Authors: Ajay Pratap; Neelam Rani

Addresses: Department of Civil Engineering, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar, Punjab, 144011, India ' Department of Civil Engineering, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar, Punjab, 144011, India

Abstract: This study examines the effect of various roof slopes of mono-slope canopy roofs (MCRs) on wind pressure distribution under various wind directions. The wind tunnel experiment is carried out on a 15° roof slope at 0° to 180° wind incidence (@30° interval) angle and validated using a 3D steady Reynolds-averaged Navier-Stokes (RANS) simulation. Further, sensitivity analysis pertaining to grid resolution and different turbulence models are performed to improve the RANS simulations at 15° MCR. It is found that the realisable k-ε turbulence model depicts more accurately and captures the flow separation, stagnation point, downstream and upstream flow. Under the parametric study, the RANS simulations are extended for (5°, 15°, 25°, 35°, and 45°) roof slopes for the exact wind directions. Mono-slope canopy with roof slope between 0° to 25° are found to be critical at 150° wind incidence angle due to higher wind pressure.

Keywords: mono-slope canopy roof; computational fluid dynamics; CFD; pressure coefficient; Reynolds-averaged Navier-Stokes; RANS; overall coefficient; drag and lift coefficient.

DOI: 10.1504/PCFD.2024.139337

Progress in Computational Fluid Dynamics, An International Journal, 2024 Vol.24 No.4, pp.226 - 239

Received: 21 Nov 2022
Accepted: 11 May 2023
Published online: 01 Jul 2024 *

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