Nested multi-scale system in the PALM large-eddy simulation model

authored by

Antti Hellsten, Klaus Ketelsen, Fotios Barmpas, Giorgios Tsegas, Nicolas Moussiopoulos, Siegfried Raasch

Abstract

Large-Eddy Simulation (LES) of atmospheric boundary layer (ABL) is becoming an important research method for urban air-quality studies. Until very recently, it was impossible to include detailed structures, such as buildings in ABL LES. Nowadays, it is possible, but such LES is still limited to a relatively small areas because typically about 1 m resolution is required. However, for several reasons an ABL LES domain should cover a large area leading to huge computational task. A means to overcome this is to concentrate resolution to the primary area of interest by means of model nesting. The idea of nesting is to simultaneously run a series of two or more LES in domains with different sizes and resolutions. In this work, two-way nesting is implemented in the parallelized LES model PALM. The nesting system is tested for several test cases including a convective boundary layer with zero mean wind, several neutral boundary layers over both flat terrain and terrain with an array of obstacles.

Organisation(s)

Institute of Meteorology and Climatology

External Organisation(s)

Finnish Meteorological Institute
Aristotle University of Thessaloniki (A.U.Th.)

Type

Contribution to book/anthology

Pages

287-292

No. of pages

6

Publication date

2018

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Applied Mathematics, Modelling and Simulation, Computer Science Applications

Sustainable Development Goals

SDG 11 - Sustainable Cities and Communities, SDG 13 - Climate Action

Electronic version(s)

https://doi.org/10.1007/978-3-319-57645-9_45 (Access: Closed)