Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Marta Wacławczyk"'
Publikováno v:
Symmetry, Vol 12, Iss 9, p 1482 (2020)
This paper addresses the problem of the existence of conformal invariance in a class of hydrodynamic models. For this we analyse an underlying transport equation for the one-point probability density function, subject to zero-scalar constraint. We ac
Externí odkaz:
https://doaj.org/article/1931c1a8756745e5b3c31661edd94c1a
Autor:
Marta Wacławczyk, Amoussou S. Gozingan, Jackson Nzotungishaka, Moein Mohammadi, Szymon P. Malinowski
Publikováno v:
Atmosphere, Vol 11, Iss 2, p 199 (2020)
In this work we study different techniques to estimate basic properties of turbulence, that is its characteristic velocity and length scale from low-resolution data. The methods are based on statistics of the signals like the velocity spectra, second
Externí odkaz:
https://doaj.org/article/52de8bbaa46840aaaa6f9fa593d8dbc1
Publikováno v:
Symmetry, Vol 7, Iss 3, Pp 1536-1566 (2015)
In this paper, we extend the classical Lie symmetry analysis from partial differential equations to integro-differential equations with functional derivatives. We continue the work of Oberlack and Wacławczyk (2006, Arch. Mech. 58, 597), (2013, J. Ma
Externí odkaz:
https://doaj.org/article/922b65266bed4a9597c2ed371a40f90c
Publikováno v:
Symmetry, Vol 8, Iss 4, p 24 (2016)
We reply to the comment by Frewer and Khujadze regarding our contribution “Lie Symmetry Analysis of the Hopf Functional-Differential Equation” (Symmetry 2015, 7(3), 1536). The method developed by the present authors considered the Lie group analy
Externí odkaz:
https://doaj.org/article/95d8b70a5e0e48a1805dcb383a7a1e34
In this work we show how to retrieve information about temporal changes of turbulence in the atmosphere based on in situ wind velocity measurements performed by aircraft. We focus on the stratocumulus-topped boundary layer high-resolution data taken
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2cad2a373b74089689343ca75024872a
https://zenodo.org/record/7943843
https://zenodo.org/record/7943843
Publikováno v:
Physical Review Fluids. 6
For three decades there have been speculations about the existence of conformal invariance in two-dimensional turbulence and possible implications thereof. These speculations have been confirmed by numerical experiments. However, there is a scarcity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a7a959d2d720c325901867536336c19
https://doi.org/10.1103/physrevfluids.6.084610
https://doi.org/10.1103/physrevfluids.6.084610
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
In Grebenev, Waclawczyk, Oberlack (2019 Phys A: Math. Theor. 52, 33), the conformal invariance (CI) of the characteristic $${\varvec{X}}_{1}(t)$$ (the zero-vorticity Lagrangian path) of the first equation (i.e. for the evolution of the 1-point PDF $$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a55c2de7debab60ef40f7e0169ab921
https://doi.org/10.1007/s00033-021-01562-2
https://doi.org/10.1007/s00033-021-01562-2
Publikováno v:
Journal of the Atmospheric Sciences
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 ε from one-dimensional (1D) intersections that resemble e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0fc7f3b4eb4ad447b32d7ec0fc9534f
https://doi.org/10.1175/jas-d-18-0146.1
https://doi.org/10.1175/jas-d-18-0146.1
Autor:
Marta Wacławczyk, Jacek Pozorski
Publikováno v:
Processes, Vol 8, Iss 1379, p 1379 (2020)
Turbulent flows featuring additional scalar fields, such as chemical species or temperature, are common in environmental and industrial applications. Their physics is complex because of a broad range of scales involved; hence, efficient computational
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37197e2333c9a3c6688973ae67402f54
https://www.mdpi.com/2227-9717/8/11/1379
https://www.mdpi.com/2227-9717/8/11/1379
Modelling of small-scale turbulence in the atmosphere play a significant role in improving our understanding of cloud processes, thereby contributing to the development of better parameterization of climate models. One of the important problems is re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84b889772e9a34d620b11ac29d236008
https://doi.org/10.5194/egusphere-egu2020-18503
https://doi.org/10.5194/egusphere-egu2020-18503