Articles | Volume 14, issue 6
Geosci. Model Dev., 14, 3185–3214, 2021
https://doi.org/10.5194/gmd-14-3185-2021

Special issue: The PALM model system 6.0 for atmospheric and oceanic boundary-layer...

Geosci. Model Dev., 14, 3185–3214, 2021
https://doi.org/10.5194/gmd-14-3185-2021

Development and technical paper 03 Jun 2021

Development and technical paper | 03 Jun 2021

A nested multi-scale system implemented in the large-eddy simulation model PALM model system 6.0

Antti Hellsten et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Antti Hellsten on behalf of the Authors (29 Jan 2021)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (09 Feb 2021) by Paul Ullrich
RR by Anonymous Referee #1 (10 Feb 2021)
ED: Publish subject to minor revisions (review by editor) (29 Mar 2021) by Paul Ullrich
AR by Anna Mirena Feist-Polner on behalf of the Authors (13 Apr 2021)  Author's response    Manuscript
ED: Publish as is (22 Apr 2021) by Paul Ullrich
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Short summary
Large-eddy simulation (LES) of the urban atmospheric boundary layer involves a large separation of turbulent scales, leading to prohibitive computational costs. An online LES–LES nesting scheme is implemented into the PALM model system 6.0 to overcome this problem. Test results show that the accuracy within the high-resolution nest domains approach the non-nested high-resolution reference results. The nesting can reduce the CPU by time up to 80 % compared to the fine-resolution reference runs.