<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Analyzing the footprints of turbulence producing\r\nmechanisms at the free water surface\r\n"^^ . "At the free wind-sheared water surface, various turbulence producing mechanisms contribute\r\nsignificantly to enhanced transfer rates of heat and gas across the air-water boundary. As a result,\r\nsurface convergence and divergence form and can be visualized in infrared images of the water\r\nsurface. Within this work the footprints of turbulent processes in the surface temperature pattern\r\nare analyzed. Image processing techniques, such as motion estimation and classification, are\r\nadapted and applied to the infrared images of the water surface. Dense flow fields are estimated\r\nwithout the suppression of surface divergence and up- and down-welling sites are identified.\r\nData from a range of laboratory facilities is evaluated with a focus on small spatial scales, low\r\nto moderate wind stress and the impact of surfactants on the surface dynamics. In this wind\r\nregime shear induced turbulence, small Langmuir circulations and microscale breaking waves are\r\nidentified as the dominant processes that drive heat exchange. The turbulent cell size is suggested\r\nas a characteristic feature of shear and Langmuir turbulence and is related against friction\r\nvelocity and wave field. Within this work, a novel method is suggested to assess the impact\r\nof individual processes on the overall heat transfer rate and tested on the measured laboratory\r\ndata also with respect to the influence of increasing wind stress and surfactant coverage. The\r\nfollowing key points are found: Shear induced turbulence is a major contributor to enhanced\r\ntransfer rates at low wind stress. Its relevance increases if the surface is covered by surfactants\r\nas the onset of waves is delayed. Langmuir circulations play a major role at intermediate wind\r\nstress and cause a significant increase of transfer rates. Surfactants on the water surface delay the\r\nevolution of Langmuir circulation and intensity considerably. Microscale breaking is a dominant\r\ncontributor at moderate wind stress and is responsible for approximately 50% and more of the\r\ntransfer rate.\r\n"^^ . "2015" . . . . . . . "Jana"^^ . "Schnieders"^^ . "Jana Schnieders"^^ . . . . . . "Analyzing the footprints of turbulence producing\r\nmechanisms at the free water surface\r\n (PDF)"^^ . . . "Dissertation_Jana.pdf"^^ . . . "Analyzing the footprints of turbulence producing\r\nmechanisms at the free water surface\r\n (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Analyzing the footprints of turbulence producing\r\nmechanisms at the free water surface\r\n (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Analyzing the footprints of turbulence producing\r\nmechanisms at the free water surface\r\n (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Analyzing the footprints of turbulence producing\r\nmechanisms at the free water surface\r\n (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Analyzing the footprints of turbulence producing\r\nmechanisms at the free water surface\r\n (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #18469 \n\nAnalyzing the footprints of turbulence producing \nmechanisms at the free water surface \n\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .