Turbulence prediction in two- and three-dimensional bundle flows using Large Eddy Simulation /
'lumps' of fluid (eddies) are thrown about in the flow.
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| Format: | Thesis eBook |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1994.
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| Online Access: | Link to OAKTrust copy |
| Summary: | 'lumps' of fluid (eddies) are thrown about in the flow. Because of velocity fluctuations, small but macroscopic Because these lumps carry mass, momentum, and energy, this completeness, LES is further used to predict the 'convection components such as heat exchangers. The present turbulence different models but most of the LES calculations have Eddy Simulation, (LES) is one of the promising techniques for eddy viscosity and the Lee's models are used to verify the enhanced mixing can lead to serious problems, such as in the excitation forces and other turbulence features are experiment conducted at the Electrical Power Research flow bundles. Engineering approaches to turbulent flow used Flow turbulence is a familiar phenomenon in everyday life. fluid velocity and by intense mixing of the fluid. The GUST program capability to calculate the lift and drag increase of pressure drop in pipe flow and tube vibrations in Institute (EPRI NP-5540, May 1988b). For the purpose of introduced (Lee 1992). In this study both the Smagorinsky's investigation is performed to test the application of LES to large-scale structures is directly computed by LES, while the mixing action is very important in engineering applications. numerical approaches to turbulence are enabled now. Large performed using both models. The results are then compared practical engineering problems such as the flow-induced ratio (P/D) of 1.4. Two- and threedimensional simulations are scales of turbulence is unlikely. Thus, the influence of the smaller eddies can be modeled. There have been several spectra of a square pitch tube array with a pitch-to-diameter subgrid viscosity approximation. Recently a new model was the calculation of turbulence within industrial flow to be based only on a combination of theory and experiment. transported downstream. Turbulent flow is characterized by random fluctuations in the utilized the Smagorinsky's eddy viscosity model as the velocity', which represents the speed at which the fluid vibration of steam generator tubes. A universal model for all With the current strides of computer technology, practical with the experimental data obtained previously from the |
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| Item Description: | "Major subject: Nuclear Engineering". Vita. |
| Physical Description: | xiv, 94 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references. |