Wind flow CFD simulation over the building rooftop

conference paper

English

This paper focuses on the wind flow over the building flat roofs which values can be used for determination of the energy potential for the small wind power plants. The wind flow is analysed on the roof of the office building in the scientific centre and detailed 3D Computation Fluid Dynamics (CFD) models of the air flow over the real terrain profile with the office building were created. High attention is paid to input boundary conditions namely to the wind velocity, wind direction and to the roughness of the surfaces. Also, because the main factor that influences the accuracy and computational expenses of the CFD simulations is the size of the computational domain, the computation model of the terrain and space was optimized to preserve maximum accuracy according to contour map of the terrain. The attention was also paid to minimization of resulting wind flow deformation. There are used data from the long-term measurement from meteorological station of the building rooftop. In this paper are compared resulting wind flow fields from two variants of the office building surroundings. Model A contains replacement of the buildings from the surrounding scientific grounds in the considred zone by coefficient of roughness according to Davenport-Wieringa and model B includes real shape of the surrounding buildings as bodies. The resulting computed wind flow above the rooftop of the building is in both cases verified by the outdoor measurement of the wind velocity. The resulting findings, especially processed images of the wind flow fields, can be used to optimizing of the wind power plant location on the building rooftop and contribute to the expansion of the microgrids and energy self-sufficiency of the buildings.

wind flow, CFD simulation

TŮMOVÁ, E.; POKORNÁ, S.; HIRŠ, J.

27. 9. 2023

American Institute of Physics Inc.

130002-1

130002-9

9

https://www.scopus.com/record/display.uri?eid=2-s2.0-85177819757&origin=resultslist&sort=plf-f&src=s&sid=a7ac4eea05581781a865c218c818969e&sot=b&sdt=b&s=DOI%2810.1063%2F5.0171152%29&sl=22&sessionSearchId=a7ac4eea05581781a865c218c818969e&relpos=0