Characterization and Low-Dimensional Modeling of Urban Fluid Flow
Abstract
This report describes work studying the structure of a model urban boundary layer flow. The flow around this geometry was studied both experimentally as well as computationally. For the experiment, a Stereoscopic Particle Image Velocimetry (SPIV) method was developed that allows for a three-dimensional description of this urban flow. On the computational side, a new spectral-element code was developed that was demonstrated to produce accurate results, and can scale to thousands of processors on large high-performance computing systems. Wind tunnel experiments were performed at a number of different angles of incidence, providing for the first time a detailed overview of the effect of wind direction on the flow structure. The effects of incidence angles from 0 to 45 degrees of the incoming flow with respect to the urban array were investigated. A strong channeling effect is observed for all incidence angles and is in agreement with that observed in other investigations for as little as 4 degrees. This channeling significantly affects the turbulence distribution within the array, the correlations between the various gust components and the structures responsible for contaminant transport.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 06, 2014
- Accession Number
- AD1013182
Entities
People
- Bruno Monnier
- Candace Wark
- Dietmar Rempfer
- Sriharsha Kandala
Organizations
- Illinois Institute of Technology