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Titlebook: IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls; Proceedings of the I T. B. Nickels Conference proceedings 20

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书目名称IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls
副标题Proceedings of the I
编辑T. B. Nickels
视频video
概述IUTAM symposia represent the state of the art in their topic.Set the standard for the next 3-5 years.Contributions by leading experts.Includes supplementary material:
丛书名称IUTAM Bookseries
图书封面Titlebook: IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls; Proceedings of the I T. B. Nickels Conference proceedings 20
描述The study of wall-bounded turbulent ows is of considerable interest from both scienti c and practical view points. As such it has attracted a great deal of research over the last 100 years. Much research has concentratedon ows over smooth walls since these are simpler from experimental, numerical and theoretical standpoints. The ow over rough walls has still received considerable attention but progress has necessarilybeenslower.Perhapsthemostessentialproblem(certainlyfromaprac- cal point of view) is to be able to predict the skin-frictiondrag acting on a plate (or a body) given a certain known roughness characteristic of the surface. Unfortunately this has proved to be very dif cult since even the simplest rough surfaces can be characterised by a number of different parameters and we still cannot directly c- nectthese tothe uiddynamicdragin a givensituation.Varioustheoriesandmodels have been proposed in order to make progress but there is still some disagreement in the community as to the correct understanding of these important ows.
出版日期Conference proceedings 2010
关键词IUTAM; dynamics; physics; rough walls; turbulence; turbulent flow; turbulent flows; wall bounded; fluid- and
版次1
doihttps://doi.org/10.1007/978-90-481-9631-9
isbn_softcover978-94-007-3340-4
isbn_ebook978-90-481-9631-9Series ISSN 1875-3507 Series E-ISSN 1875-3493
issn_series 1875-3507
copyrightSpringer Science+Business Media B.V. 2010
The information of publication is updating

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Boundary Layer Structure over a Two-Dimensional Rough Wall,lts for a smooth wall and a three-dimensional (3-D) roughness [.]. The present experiments were made on transverse square bars in the fully-rough flow regime. The 2-D bars lead to significant changes in the turbulence in the outer flow. Reynolds stresses, particularly .and ., increase, although the
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LDV Measurement Near a Rough Surface for a Turbulent Boundary Layer,d at the momentum thickness Reynolds number of 6,000 and the roughness Reynolds number of 150. The local skin friction coefficient can be represented as the sum of the mean flow momentum flux and the Reynolds shear stress at the top surface between the roughness elements. The moment centroid of the
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POD Analysis of the Near-Wall Region of a Rough Wall Turbulent Boundary Layer,ough wall made of transverse square bars. Two bar spacings were investigated (.and 7, . is the bar spacing and . the bar diameter). This ratio affects the energy distribution amongst the POD modes throughout the boundary layer,the higher modes, i.e. the relatively small-scale and less energetic moti
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An Experimental Study of a Turbulent Wall Jet on Smooth and Rough Surfaces,try. The Reynolds number based on the slot height and exit velocity of the jet was .≈ 7, 500. A 36-grit sheet was used as the rough surface, creating a transitionally rough flow (5 ≤ ..≤ 70). Both conventional and momentum-viscosity scaling were used to analyze the streamwise evolution of the flow.
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,A High Reynolds Number Turbulent Boundary Layer with Regular ‘Braille-Type’ Roughness,r embossed by a Braille printer. The resulting roughness distribution was regular, three-dimensional and relatively sparse in the spanwise direction. Careful hot-wire studies show that the near-wall peak in turbulence intensity is reduced by the roughness, as expected. Comparisons with smooth-wall d
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