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Numerical simulations of baroclinic driven flows in a thermally driven rotating annulus using the immersed boundary method

von Larcher, Thomas and Dörnbrack, Andreas (2014) Numerical simulations of baroclinic driven flows in a thermally driven rotating annulus using the immersed boundary method. Meteorologische Zeitschrift, pp. 1-12. Borntraeger Science Publishers. DOI: 10.1127/metz/2014/0609 ISSN 0941-2948

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Official URL: http://dx.doi.org/10.1127/metz/2014/0609

Abstract

We present results of numerical simulations of baroclinic driven flows in the thermally driven rotating annulus using the immersed boundary method for modeling of the boundary conditions. The Navier-Stokes equations in the Boussinesq approximation are solved in the Eulerian flux-form advection scheme with the geophysical flow solver EULAG as numerical framework.We test our approach against results of an appropriate laboratory experiment with water as working fluid and directly aim at the wavy flow regime where complex flows and regular wave patterns are generally observed but where centrifugal effects and turbulence is of minor importance. Multivariate statistical methods are used for analyzing time series of computed temperature data. We, here, present the outcome of the time series data analysis at particular parameter points, and specifically analyze a complex wave-wave interaction, and, secondly, a wave mode switch where the azimuthal wave number changes to the next higher one. The numerical results are highly consistent with the experimental observations. That encourage us to focus on our actual goal as the next step, that is the irregular flow regime found at large rotation rates where the centrifugal force has an increasing effect on flow states and where multiple scale flows are generally observed.

Item URL in elib:https://elib.dlr.de/92885/
Document Type:Article
Title:Numerical simulations of baroclinic driven flows in a thermally driven rotating annulus using the immersed boundary method
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
von Larcher, ThomasFreie Universität, BerlinUNSPECIFIED
Dörnbrack, AndreasDLR, IPAUNSPECIFIED
Date:2014
Journal or Publication Title:Meteorologische Zeitschrift
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1127/metz/2014/0609
Page Range:pp. 1-12
Publisher:Borntraeger Science Publishers
ISSN:0941-2948
Status:Published
Keywords:baroclinic driven flows, thermally driven rotating annulus, numerical experiments, immersed boundary method, complex flow regimes, multivariate time series analysis
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Ziegele, Brigitte
Deposited On:01 Dec 2014 14:19
Last Modified:08 Mar 2018 18:46

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