Number of the records: 1
Effect of the angle of attack on the flow around two non-identical-height square buildings in tandem arrangement
- 1.
SYSNO ASEP 0579675 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of the angle of attack on the flow around two non-identical-height square buildings in tandem arrangement Author(s) Niegodajew, P. (PL)
Procházka, Pavel P. (UT-L) RID, ORCID, SAI
Uruba, Václav (UT-L) RID, ORCID
Elsner, W. (PL)
Gnatowska, R. (PL)Article number 111076 Source Title Building and Environment. - : Elsevier - ISSN 0360-1323
Roč. 248, January (2024)Number of pages 19 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords flow patterns ; non-identical-height square cylinders ; particle image velocimetry ; pedestrian wind comfort ; tandem arrangement Subject RIV BK - Fluid Dynamics OECD category Applied mechanics Method of publishing Open access Institutional support UT-L - RVO:61388998 UT WOS 001135326300001 EID SCOPUS 85179134357 DOI 10.1016/j.buildenv.2023.111076 Annotation The paper investigates the flow around two non-identical height buildings, each with the same square cross-section, arranged in tandem using a particle image velocimetry technique. Fixed gap spacing between objects G=1.5D (where D is the side building's length) and fixed Reynolds number Re=17000 were considered in the study. The key goal of the research was examining the effect of the angle of attack α in the range from 0° to 30° on the flow structure. Considerable attention was paid to assessing the ventilation performance for the investigated flow configurations. Also, the pedestrian-level wind conditions were evaluated for all the considered values of the angle α. When α grows up, the flow is more prone to enter the gap space and elevates locally the velocity in that region. When the flow leaves the gap on the other side, it mixes with the side shear layer and both generate the recirculation area next to the downstream buildings. As α increases, the highest values of the turbulence kinetic energy are seen outside the gap space. The strength of the downwash and upwash effects on the symmetry plane becomes reduced with growing α. No clear dependency between the Strouhal number and the angle α was observed. The contribution of α to the ventilation process in the gap is different at different heights. A conversion from the weak to tolerable wind condition takes place in the gap when α increases. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2025 Electronic address https://www.sciencedirect.com/journal/building-and-environment
Number of the records: 1