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By J. C. Wyngard, C.-H. Moeng, J. C. Weil (auth.), Thomas B. Gatski, Charles G. Speziale, Sutanu Sarkar (eds.)

ISBN-10: 1461227925

ISBN-13: 9781461227922

ISBN-10: 1461276721

ISBN-13: 9781461276722

This e-book includes contributions by way of former scholars, colleagues and pals of Professor John L. Lumley, at the celebration of his sixtieth birthday, in reputation of his huge, immense influence at the development of turbulence study. quite a few experimental, computational and theoretical subject matters, together with turbulence modeling, direct numerical simulations, compressible turbulence, turbulent shear flows, coherent buildings and the right kind Orthogonal Decomposition are contained herein. the variety and scope of those contributions are additional acknowledgment of John Lumley's broad ranging impact within the box of turbulence. the big variety of contributions through the authors, lots of whom have been individuals within the Lumley Symposium: contemporary advancements in Turbulence (held at ICASE, NASA Langley study middle on November 12 & thirteen, 1990), has provided us with the original opportu­ nity to pick a number of numerical and theoretical papers for inclusion within the magazine Theoretical and Computational Fluid Dynamics for which Professor Lumley serves as Editor. prolonged Abstracts of those pa­ pers are incorporated during this quantity and are accurately marked. The certain factor of TCFD will seem this 12 months and may function an extra tribute to John Lumley. As is mostly the case, the efforts of others have considerably eased our initiatives. we wish to precise our deep appreciation to Drs. R.

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T'· . . ·. ·r. · · · .. ·. . -... . , . , . . : : . .. . :, 10 20 30 40 50 60 FIGURE 2. Small terms in €-budget for channel flow ReT = 395 ......... Pt3 ; ........ Tt ; ~ ITt; x x x x sum of all terms. The terms Pi and Y increase with increasing Reynolds number, but their difference remains independent of Reynolds number (once this is sufficiently high); the latter is true also for the rate of change and transport terms, of which in the channel flow situation only the diffusion term is non-zero.

Of Mech. K. , 1988, Turbulence modeling based on direct simulation of the Navier-Stokes equations. First National 38 W. Rodi and N. N. Mansour Fluid Dynamics Congress, Cincinnati, Ohio, AIAA 883747-CP. J. , 1975, Progress in the development of a Reynolds-stress turbulence closure. J. Fluid Mech. 68, 537-566. [19] Hanjalic, K. , 1976, Contribution towards a Reynolds-stress closure for low-Reynolds-number turbulence. J. Fluid Mech. 74, 593-610. [20] Rodi, W. & Mansour, N. , 1990, Low-Reynolds number k-€ modeling with the aid of direct simulation data.

T······:· . : ~;: : t :· :~:· ~-++-1>-4 .. · ···· . ....... . 0025 ~ ...... . . [............. · ···· o 10 20 30 40 50 60 y+ FIGURE 6. Model for Pe3 -production compared with DN8 data (ReT = 395) . DN8 data; - - new model; ........ L8 model. terms, but it is comparable with their sum and also with the turbulent diffusion term (see Fig. 2). Hence it is important to represent realistically also this term in a model. Hanjalic and Launder [19] used a generalized gradient approximation for the fluctuating velocity gradients U~,j appearing in the turbulence correlation in the term and expressed these gradients in terms of second derivatives of the mean velocity.

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Studies in Turbulence by J. C. Wyngard, C.-H. Moeng, J. C. Weil (auth.), Thomas B. Gatski, Charles G. Speziale, Sutanu Sarkar (eds.)

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