Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Urs Schaefer-Rolffs"'
Autor:
Urs Schaefer-Rolffs
Publikováno v:
Meteorologische Zeitschrift, Vol 32, Iss 5, Pp 413-429 (2023)
An extension of the dynamic Smgarorinsky model (DSM) is presented. In the so-called dynamic mixed model (DMM), the Leonard stress (i.e., the resolved part of the Reynolds stress) is no longer parameterized in the test filter range by the Smagorinsky
Externí odkaz:
https://doaj.org/article/bf2f96f9a08e428b96f4d230b9e465c7
Autor:
Urs Schaefer-Rolffs
Publikováno v:
Meteorologische Zeitschrift, Vol 27, Iss 3, Pp 249-261 (2018)
A discussion of different approaches and solutions of the basic tensor equation within the Dynamic Smagorinsky Model (DSM) suitable for General Circulation Models (GCM) is presented. Particular interest is dedicated to the relationship between variou
Externí odkaz:
https://doaj.org/article/5a620b17694147a69eac2783a686b17a
Autor:
Urs Schaefer-Rolffs
Publikováno v:
Meteorologische Zeitschrift, Vol 26, Iss 2, Pp 181-187 (2017)
A generalized formulation of the Dynamic Smagorinsky Model (DSM) is proposed as a versatile turbulent momentum diffusion scheme for Large-Eddy Simulations. The difference to previous versions of the DSM is a modified test filter range that can be cho
Externí odkaz:
https://doaj.org/article/8fb1236df0ef4150817fcb8bc8428c73
Publikováno v:
Meteorologische Zeitschrift, Vol 24, Iss 1, Pp 3-13 (2015)
Turbulent kinetic energy cascades in fluid dynamical systems are usually characterized by scale invariance. However, representations of subgrid scales in large eddy simulations do not necessarily fulfill this constraint. So far, scale invariance has
Externí odkaz:
https://doaj.org/article/06db7fad65d84ad6b2875d7035665a4f
Autor:
Urs Schaefer-Rolffs
Globale Modelle der Atmosphäre können nur stabil laufen, wenn der Lorenzsche Energiezyklus durch eine Turbulenzparametrisierung geschlossen wird, d.h., dass der Energietransfer zu immer kleineren Skalen im Bereich der Auflösungsgrenze durch einen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2c0f51faca852af8c0adc7f0dd4b44e
https://doi.org/10.5194/dach2022-65
https://doi.org/10.5194/dach2022-65
Autor:
Urs Schaefer-Rolffs
Publikováno v:
European Journal of Mechanics - B/Fluids. 74:92-98
The scale invariance of geophysical fluids is investigated in terms of a scale invariance criterion. It was developed by Schaefer-Rolffs et al. (2015) based on the implication that each scale invariant subrange shall have its own criterion. Two parti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cea64c7e0bba07f32bfcc9172f44ea75
https://doi.org/10.1016/j.euromechflu.2018.11.005
https://doi.org/10.1016/j.euromechflu.2018.11.005
Autor:
Urs Schaefer-Rolffs
Scale invariance of geophysical fluids is investigated in terms of a scale invariance criterion. It was developed by Schaefer-Rolffs et al. (2015) based on the implication that each scale invariant subrange shall have its own criterion. Two particula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b59d6319668be7f37b1165f5f535953e
https://doi.org/10.5194/egusphere-egu2020-8684
https://doi.org/10.5194/egusphere-egu2020-8684
Autor:
Urs Schaefer-Rolffs
Publikováno v:
European Journal of Mechanics - B/Fluids. 78:147-149
In a recently published article (Schaefer-Rolffs, 2019), a scale-invariance criterion for the primitive equations in anelastic approximation is provided. Unfortunately, the set of scaling relations that were derived from the Primitive Equations was n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f51159b0ff27f4045bb59ce1abfbc10a
https://doi.org/10.1016/j.euromechflu.2019.06.003
https://doi.org/10.1016/j.euromechflu.2019.06.003
Publikováno v:
Meteorologische Zeitschrift, Vol 24, Iss 1, Pp 3-13 (2015)
Turbulent kinetic energy cascades in fluid dynamical systems are usually characterized by scale invariance. However, representations of subgrid scales in large eddy simulations do not necessarily fulfill this constraint. So far, scale invariance has
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2458f2e1195771f4d89c85a7c39a77e9
https://doaj.org/article/06db7fad65d84ad6b2875d7035665a4f
https://doaj.org/article/06db7fad65d84ad6b2875d7035665a4f
Autor:
Erich Becker, Urs Schaefer-Rolffs
Publikováno v:
Monthly Weather Review. 141:887-899
A dynamic version of Smagorinsky’s diffusion scheme is presented that is applicable for large-eddy simulations (LES) of the atmospheric dynamics. The approach is motivated (i) by the incompatibility of conventional hyperdiffusion schemes with the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27cf56c243303a4608d29d185e6984f3
https://doi.org/10.1175/mwr-d-12-00101.1
https://doi.org/10.1175/mwr-d-12-00101.1