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Titlebook: DESider – A European Effort on Hybrid RANS-LES Modelling; Results of the Europ Werner Haase,Marianna Braza,Alistair Revell Conference proce

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书目名称DESider – A European Effort on Hybrid RANS-LES Modelling
副标题Results of the Europ
编辑Werner Haase,Marianna Braza,Alistair Revell
视频video
概述Presents the most up-to-date research on Hybrid RANS-LES modelling in aeronautics
丛书名称Notes on Numerical Fluid Mechanics and Multidisciplinary Design
图书封面Titlebook: DESider – A European Effort on Hybrid RANS-LES Modelling; Results of the Europ Werner Haase,Marianna Braza,Alistair Revell Conference proce
描述Preface “In aircraft design, efficiency is determined by the ability to accurately and rel- bly predict the occurrence of, and to model the development of, turbulent flows. Hence, the main objective in industrial computational fluid dynamics (CFD) is to increase the capabilities for an improved predictive accuracy for both complex flows and complex geometries”. This text part taken from Haase et al (2006), - scribing the results of the DESider predecessor project “FLOMANIA” is still - and will be in future valid. With an ever-increasing demand for faster, more reliable and cleaner aircraft, flight envelopes are necessarily shifted into areas of the flow regimes exhibiting highly unsteady and, for military aircraft, unstable flow behaviour. This undou- edly poses major new challenges in CFD; generally stated as an increased pred- tive accuracy whist retaining “affordable” computation times. Together with highly resolved meshes employing millions of nodes, numerical methods must have the inherent capability to predict unsteady flows. Although at present, (U)RANS methods are likely to remain as the workhorses in industry, the DESider project focussed on the development and combination
出版日期Conference proceedings 2009
关键词Computational fluid dynamics; Hybrid RANS-LES Methods; Numerical Fluid Mechanics; RANS-LES; SAS; Simulati
版次1
doihttps://doi.org/10.1007/978-3-540-92773-0
isbn_softcover978-3-642-10085-7
isbn_ebook978-3-540-92773-0Series ISSN 1612-2909 Series E-ISSN 1860-0824
issn_series 1612-2909
copyrightSpringer-Verlag Berlin Heidelberg 2009
The information of publication is updating

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III DESider Measurements,DESider project. Flow situations in which RANS models are known to fail were looked for, which led to investigate a massively separated flow, with a separation point not imposed by the geometry, as well as reattachment and recovery after reattachment in a highly three-dimensional situation. Not only
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IV Applications - Test Cases, low aspect ratio (L/D=4.8) and a high blockage coefficient (D/H=0.208) is investigated. This confined environment is used in order to allow direct comparisons with realisable 3D Navier-Stokes computations avoiding ‘infinite’ spanwise conditions. The flow is investigated in the critical regime at ..
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VI Summary of Experience with Hybrid RANS-LES Methods and a Look Ahead,f fluid dynamics for industrial systems, all so-called “real-world” applications exhibit complex flow phenomena such as unsteady flow, (massive) separation, transition to turbulence and turbulence itself. All theses applications, exhibiting massive flow separation, need ideally the use of advanced t
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First and Second Moments of Area,ses on turbulent unsteady aerodynamic flows. Recent modelling approaches such as DES, hybrid RANS-LES, embedded LES (summarised as “RANS-LES Methods”) but also URANS had not yet – at the beginning of the project - reached the same or a comparable maturity for becoming general predictive tools for industrial CFD with a “sensible” reliability.
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Werner Haase,Marianna Braza,Alistair RevellPresents the most up-to-date research on Hybrid RANS-LES modelling in aeronautics
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