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pro vyhledávání: '"Anqing Xuan"'
Gas transfer between ocean and atmosphere is largely governed by the turbulence in the topmost centimetres beneath the free surface. It has been frequently observed that areas of strong positive divergence of the surface-tangential velocity field cor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6002c481ea51e463b24ab4da81495b9d
https://doi.org/10.5194/egusphere-egu23-15444
https://doi.org/10.5194/egusphere-egu23-15444
Turbulence close beneath a free surface leaves recognisable imprints on the surface itself. The ability to identify and quantify long-lived coherent turbulent features from their surface manifestations only could open up possibilities for remote sens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::935dec259611338e51a32164b41aac1a
https://doi.org/10.5194/egusphere-egu22-9776
https://doi.org/10.5194/egusphere-egu22-9776
Autor:
Anqing Xuan, Lian Shen
Publikováno v:
Journal of Fluid Mechanics. 931
The dependence of Reynolds shear stress on wave phase is investigated for initially isotropic turbulence distorted by a progressive surface wave through direct numerical simulations. A wave-following streamline coordinate frame is used to analyse the
Publikováno v:
Journal of Fluid Mechanics. 875:173-224
The effects of a water surface wave on the vorticity in the turbulence underneath are studied for Langmuir turbulence using wave-phase-resolved large-eddy simulation. The simulations are performed on a dynamically evolving wave-surface-fitted grid su
Autor:
Lian Shen, Anqing Xuan
Publikováno v:
Journal of Computational Physics. 378:18-43
A numerical scheme with good conservation properties is developed for the simulation of free-surface turbulent and viscous wave flows using a surface-fitted curvilinear grid. The Navier–Stokes equations are written in a strong conservative formulat
Publikováno v:
Journal of Fluid Mechanics. 861:275-308
Langmuir circulations (LCs) generated by the interaction between wind-driven currents and surface waves can engulf the whole water column in neutrally stratified shallow water and interact with the turbulence in the bottom boundary layer. In this stu
Publikováno v:
Journal of Fluid Mechanics. 904
The dynamics of Reynolds stresses and turbulent kinetic energy (TKE) in Langmuir turbulence are analysed using data of large-eddy simulations with the wave phase resolved. It is found that the streamwise and spanwise Reynolds normal stresses and the
Publikováno v:
Journal of Computational Physics. 448:110740
We develop a unified adaptive level set (LS) framework using the multi-level collocated grid for incompressible two-phase flows. This framework allows us to advance all variables level by level using either the subcycling or the non-subcycling method
Publikováno v:
International Journal of Heat and Fluid Flow. 81:108517
The mechanism of the generation and evolution of the air-core vortex formed between a free surface and a horizontal flow intake is investigated using large-eddy simulation of two-phase flows, with the air-water interface captured by a coupled level-s
Publikováno v:
IOP Conference Series: Earth and Environmental Science. 240:032037