Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Brian Lewis Sawford"'
Publikováno v:
Journal of Fluid Mechanics. 799:352-382
Statistics of the trajectories of molecules diffusing via Brownian motion in a turbulent flow are extracted from simulations of stationary isotropic turbulence, using a postprocessing approach applicable in both forward and backward reference frames.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4b614f032526efc7124cb2c1e8b80f8
https://doi.org/10.1017/jfm.2016.359
https://doi.org/10.1017/jfm.2016.359
Autor:
Brian Lewis Sawford, Pui-Kuen Yeung
Publikováno v:
Procedia IUTAM. 9:129-137
Direct numerical simulation data for the Lagrangian velocity structure functions conditioned on the local (in time) rate of dissi- pation of turbulence kinetic energy are analyzed over a wide range of Reynolds numbers to seek direct evidence for Lagr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af92c1930a294969465933d5bb3cecf8
Autor:
Pui-Kuen Yeung, Brian Lewis Sawford
Publikováno v:
Flow, Turbulence and Combustion. 85:345-362
We have used direct numerical simulation results for the Eulerian velocity difference probability density function and the mean acceleration difference conditioned on the velocity difference, to explore some of the assumptions underlying the formulat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1287cf5cce47f927bcbb0dca28892488
https://doi.org/10.1007/s10494-010-9255-6
https://doi.org/10.1007/s10494-010-9255-6
Publikováno v:
Journal of Fluid Mechanics. 582:423-448
The modelling of fluid-particle acceleration in homogeneous isotropic turbulence in terms of stochastic models for the Lagrangian velocity, acceleration and a dissipation rate variable is considered. The basis for the Reynolds model (A. M. Reynolds,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1e8a2167392290cdf67563e8088d982
https://doi.org/10.1017/s0022112007006052
https://doi.org/10.1017/s0022112007006052
Autor:
Brian Lewis Sawford
Publikováno v:
Boundary-Layer Meteorology. 118:1-23
Statistics of conserved and reactive scalar concentration in a scalar mixing layer are calculated using a Lagrangian particle model coupled to a micro-mixing model and using conserved scalar theory for the chemistry. Good agreement is obtained with l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d1759e42ec0b987c8ba3146aec11255
https://doi.org/10.1007/s10546-005-4737-0
https://doi.org/10.1007/s10546-005-4737-0
Publikováno v:
Physics of Fluids. 16:3888-3899
We demonstrate the existence of Batchelor’s viscous-convective subrange using direct numerical simulation (DNS) results to confirm the logarithmic dependence of the scalar structure function on the separation for the scalar field generated by stati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82abdd08c948a21715f4396a8248c13c
https://doi.org/10.1063/1.1780550
https://doi.org/10.1063/1.1780550
Autor:
Pui-Kuen Yeung, Brian Lewis Sawford
Publikováno v:
Journal of Fluid Mechanics. 459:129-138
The hypothesis of the small scales being passively swept along by the large-scale motions in turbulent flow is extended to passive scalars in isotropic turbulence. A theory based on strong mutual cancellation between local and advective derivatives a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfe496087c4ec930bbc82ecd9bbee255
https://doi.org/10.1017/s0022112002008248
https://doi.org/10.1017/s0022112002008248
Publikováno v:
Boundary-Layer Meteorology. 97:219-249
We analyse cross-wind-integrated statistics of the concentration field of a conserved scalar for point and line sources in grid turbulence. In particular, using wind-tunnel measurements we calculate the cross-wind integrated probability density funct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::255e4821de1c36352b55ee5a6a5965ee
https://doi.org/10.1023/a:1002794510020
https://doi.org/10.1023/a:1002794510020
Autor:
Brian Lewis Sawford
Publikováno v:
Boundary-Layer Meteorology. 93:411-424
We present a new measure for the rotation of Lagrangian trajectories in turbulence that simplifies and generalises that suggested by Wilson and Flesch ( Boundary-Layer Meteorol. 84, 411–426). The new measure is the cross product of the velocity and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::452a8ea166287e9127828e7de2a81542
https://doi.org/10.1023/a:1002114132715
https://doi.org/10.1023/a:1002114132715
The Kwinana Coastal Fumigation Study: I – Program Overview, Experimental Design and Selected Results
Autor:
K. N. Rayner, J. A. Noonan, Brian Lewis Sawford, J. N. Carras, Ashok K. Luhar, Stuart A. Young, D. J. Williams, I. H. Yoon, Jorg M. Hacker
Publikováno v:
Boundary-Layer Meteorology. 89:359-384
Fumigation under sea-breeze conditions is a major feature of the air pollution meteorology in the coastal industrial region of Kwinana, south of Perth in Western Australia. An intensive field experiment on fumigation was carried out in the region in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31fc5e25659c0972982ccf371e30f5fc
https://doi.org/10.1023/a:1001758118814
https://doi.org/10.1023/a:1001758118814