MicroHH 1.0: a computational fluid dynamics code for direct numerical simulation and large-eddy simulation of atmospheric boundary layer flows

This paper describes MicroHH 1.0, a new and open-source (www.microhh.org) computational fluid dynamics code for the simulation of turbulent flows in the atmosphere. It is primarily made for direct numerical simulation but also supports large-eddy simulation (LES). The paper covers the description of...

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Vydané v:Geoscientific Model Development Ročník 10; číslo 8; s. 3145 - 3165
Hlavní autori: van Heerwaarden, Chiel C., van Stratum, Bart J. H., Heus, Thijs, Gibbs, Jeremy A., Fedorovich, Evgeni, Mellado, Juan Pedro
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Katlenburg-Lindau Copernicus GmbH 28.08.2017
Copernicus Publications
Predmet:
Accuracy
Anelasticity
Atmospheric boundary layer
Atmospheric circulation
Boundary conditions
Boundary layer flow
Boundary layers
Boundary layers (Fluid dynamics)
Boussinesq approximation
Channel flow
Climate models
Computational fluid dynamics
Computer applications
Computer simulation
Conservation
Convection
Dimensional analysis
Direct numerical simulation
Eddies (Fluid dynamics)
Energy
Fluid dynamics
Fluid flow
Graphics processing units
Hydrodynamics
Large eddy simulation
Large eddy simulations
Mathematical models
Meteorologie en Luchtkwaliteit
Meteorology and Air Quality
Moist convection
Numerical models
Numerical simulations
Oceanic eddies
Performance tests
Scaling
Simulation
Variables
Velocity
Vortices
WIMEK
ISSN:1991-9603, 1991-959X, 1991-962X, 1991-9603, 1991-962X
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Shrnutí:This paper describes MicroHH 1.0, a new and open-source (www.microhh.org) computational fluid dynamics code for the simulation of turbulent flows in the atmosphere. It is primarily made for direct numerical simulation but also supports large-eddy simulation (LES). The paper covers the description of the governing equations, their numerical implementation, and the parameterizations included in the code. Furthermore, the paper presents the validation of the dynamical core in the form of convergence and conservation tests, and comparison of simulations of channel flows and slope flows against well-established test cases. The full numerical model, including the associated parameterizations for LES, has been tested for a set of cases under stable and unstable conditions, under the Boussinesq and anelastic approximations, and with dry and moist convection under stationary and time-varying boundary conditions. The paper presents performance tests showing good scaling from 256 to 32 768 processes. The graphical processing unit (GPU)-enabled version of the code can reach a speedup of more than an order of magnitude for simulations that fit in the memory of a single GPU.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 14
ISSN:1991-9603
1991-959X
1991-962X
1991-9603
1991-962X
DOI:10.5194/gmd-10-3145-2017