The impact of level of detail in 3d city models for cfd-based wind flow simulations

C. García-Sánchez*, S. Vitalis, I. Paden, J. Stoter

*Corresponding author for this work

Research output: Contribution to journalConference articleScientificpeer-review

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Abstract

Climate change and urbanization rates are transforming urban environments, making the use of 3D city models in computational fluid dynamics (CFD) a fundamental ingredient to evaluate urban layouts before construction. However, current geometries used in CFD simulations tend to be built by CFD experts to test specific cases, most of the times oversimplifying their designs due to lack of information or in order to reduce complexity. In this work we explore what are the effects of oversimplifying geometries by comparing wind simulations of different level of detail geometries. We use semantic 3D city models automatically built and adjust them to their suitable use in CFD. For the first test, we explore wind simulations within a troublesome section of the TUDelft campus, the passage next to the EWI building (the tallest building in our domain), where the use of 3D city model variants show how differences in geometry and surface properties affect local wind conditions. Finally we analyze what these differences in velocity magnitude could mean for practitioners in terms of pedestrian wind comfort.

Original languageEnglish
Pages (from-to)67-72
JournalInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
Volume46
Issue number4/W4-2021
DOIs
Publication statusPublished - 2021
Event16th 3D GeoInfo Conference 2021 - New York City, United States
Duration: 11 Oct 202114 Oct 2021

Keywords

  • 3D City Models
  • Computational Fluid Dynamics
  • Level of Details
  • Pedestrian Wind Comfort
  • Semantic Surfaces
  • Wind Flows

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