Mostra el registre d'ítem simple
Estimating turbulence kinetic energy dissipation rate in numerically simulated stratocumulus cloud-top mixing layers
dc.contributor.author | Akinlabi, Emmanuel |
dc.contributor.author | Waclawczyk, Marta |
dc.contributor.author | Mellado González, Juan Pedro |
dc.contributor.author | Malinowski, Szymon |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Física |
dc.date.accessioned | 2020-03-12T11:33:27Z |
dc.date.available | 2020-03-12T11:33:27Z |
dc.date.issued | 2019-05-01 |
dc.identifier.citation | Akinlabi, E. [et al.]. Estimating turbulence kinetic energy dissipation rate in numerically simulated stratocumulus cloud-top mixing layers. "Journal of the atmospheric sciences", 1 Maig 2019, vol. 76, p. 1471-1488. |
dc.identifier.issn | 0022-4928 |
dc.identifier.uri | http://hdl.handle.net/2117/179795 |
dc.description.abstract | In this work, direct numerical simulation (DNS) of the stratocumulus cloud-top mixing layer is used to test various approaches to estimate the turbulence kinetic energy (TKE) dissipation rate « from one-dimensional (1D) intersections that resemble experimental series. Results of these estimates are compared with ‘‘true’’ (DNS) values of « in buoyant and inhomogeneous atmospheric flows. We focus on recently proposed methods of the TKE dissipation-rate retrievals based on zero crossings and recovering the missing part of the spectrum. These methods are tested on fully resolved turbulence fields and compared to standard retrievals from power spectra and structure functions. Anisotropy of turbulence due to buoyancy is shown to influence retrievals based on the vertical velocity component. TKE dissipation-rate estimates from the number of crossings correspond well to spectral estimates. The method based on the recovery of the missing part of the spectrum works best for Pope’s model of the dissipation spectrum and is sensitive to external intermittency. This allows for characterization of external intermittency by the Taylor-to-Liepmann scale ratio. Further improvements of this method are possible when the variance of the velocity derivative is used instead of the number of zero crossings per unit length. In conclusion, the new methods of TKE dissipation-rate retrieval from 1D series provide a valuable complement to standard approaches. |
dc.format.extent | 18 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Física |
dc.subject.lcsh | Turbulence |
dc.subject.lcsh | Atmospheric physics |
dc.subject.other | Turbulence kinetic energy |
dc.subject.other | Direct numerical simulation |
dc.subject.other | Stratocumulus |
dc.title | Estimating turbulence kinetic energy dissipation rate in numerically simulated stratocumulus cloud-top mixing layers |
dc.type | Article |
dc.subject.lemac | Física atmosfèrica |
dc.subject.lemac | Turbulència |
dc.identifier.doi | 10.1175/JAS-D-18-0146.1 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | https://journals.ametsoc.org/doi/abs/10.1175/JAS-D-18-0146.1?mobileUi=0& |
dc.rights.access | Open Access |
local.identifier.drac | 27233956 |
dc.description.version | Postprint (published version) |
dc.relation.projectid | info:eu-repo/grantAgreement/EC/H2020/675675/EU/Cloud-MicroPhysics-Turbulence-Telemetry: An inter-multidisciplinary training network for enhancing the understanding and modeling of atmospheric clouds/COMPLETE |
local.citation.author | Akinlabi, E.; Waclawczyk, M.; Mellado, J. P.; Malinowski, S. |
local.citation.publicationName | Journal of the atmospheric sciences |
local.citation.volume | 76 |
local.citation.startingPage | 1471 |
local.citation.endingPage | 1488 |
Fitxers d'aquest items
Aquest ítem apareix a les col·leccions següents
-
Articles de revista [2.208]