Evaluation of the dynamic core of the PALM model system 6.0 in a neutrally stratified urban environment: comparison between LES and wind-tunnel experiments-Reference-Cited by-同舟云学术

Evaluation of the dynamic core of the PALM model system 6.0 in a neutrally stratified urban environment: comparison between LES and wind-tunnel experiments

Published:2021-06-04 Issue:6 Volume:14 Page:3317-3333
ISSN:1991-9603
Container-title:Geoscientific Model Development
language:en
Short-container-title:Geosci. Model Dev.

Author:

Gronemeier Tobias^ORCID,Surm Kerstin,Harms Frank,Leitl Bernd,Maronga Björn,Raasch Siegfried

Abstract

Abstract. We demonstrate the capability of the PALM model system version 6.0 to simulate neutrally stratified urban boundary layers. Our simulation uses the real-world building configuration of the HafenCity area in Hamburg, Germany. Using PALM's virtual measurement module, we compare simulation results to wind-tunnel measurements of a downscaled replica of the study area. Wind-tunnel measurements of mean wind speed agree within 5 % on average while the wind direction deviates by approximately 4∘. Turbulence statistics similarly agree. However, larger differences between measurements and simulation arise in the vicinity of surfaces where building geometry is insufficiently resolved. We discuss how to minimize these differences by improving the grid layout and give tips for setup preparation. Also, we discuss how existing and upcoming features of PALM like the grid nesting and immersed boundary condition help improve the simulation results.

Publisher

Copernicus GmbH

Link

https://gmd.copernicus.org/articles/14/3317/2021/gmd-14-3317-2021.pdf

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