On Coarse Grained Simulations Of High Re Turbulent Material Mixing U PDF Download
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Release | : 2011 |
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Download On Coarse Grained Simulations of High-re Turbulent Material Mixing (u). Book in PDF, ePub and Kindle
Author | : Fernando F. Grinstein |
Publisher | : Cambridge University Press |
Total Pages | : 481 |
Release | : 2016-06-30 |
Genre | : Technology & Engineering |
ISBN | : 1316571742 |
Download Coarse Grained Simulation and Turbulent Mixing Book in PDF, ePub and Kindle
Small-scale turbulent flow dynamics is traditionally viewed as universal and as enslaved to that of larger scales. In coarse grained simulation (CGS), large energy-containing structures are resolved, smaller structures are spatially filtered out, and unresolved subgrid scale (SGS) effects are modeled. Coarse Grained Simulation and Turbulent Mixing reviews our understanding of CGS. Beginning with an introduction to the fundamental theory the discussion then moves to the crucial challenges of predictability. Next, it addresses verification and validation, the primary means of assessing accuracy and reliability of numerical simulation. The final part reports on the progress made in addressing difficult non-equilibrium applications of timely current interest involving variable density turbulent mixing. The book will be of fundamental interest to graduate students, research scientists, and professionals involved in the design and analysis of complex turbulent flows.
Author | : Fenando F. Grinstein |
Publisher | : Cambridge University Press |
Total Pages | : 481 |
Release | : 2016-06-30 |
Genre | : Science |
ISBN | : 1107137047 |
Download Coarse Grained Simulation and Turbulent Mixing Book in PDF, ePub and Kindle
Reviews our current understanding of the subject. For graduate students and researchers in computational fluid dynamics and turbulence.
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Release | : 2009 |
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Download On the Simulation of Shock-driven Material Mixing in High-Re Flows (u). Book in PDF, ePub and Kindle
Implicit large eddy simulation proposes to effectively rely on the use of subgrid modeling and filtering provided implicitly by physics capturing numerics. Extensive work has demonstrated that predictive simulations of turbulent velocity fields are possible using a class of high resolution, non-oscillatory finite-volume (NFV) numerical algorithms. Truncation terms associated with NFV methods implicitly provide subgrid models capable of emulating the physical dynamics of the unresolved turbulent velocity fluctuations by themselves. The extension of the approach to the substantially more difficult problem of under-resolved material mixing by an under-resolved velocity field has not yet been investigated numerically, nor are there any theories as to when the methodology may be expected to be successful. Progress in addressing these issues in studies of shock-driven scalar mixing driven by Ritchmyer-Meshkov instabilities will be reported in the context of ongoing simulations of shock-tube laboratory experiments.
Author | : Adam Joseph Wachtor |
Publisher | : |
Total Pages | : 127 |
Release | : 2012 |
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ISBN | : 9781267657275 |
Download On the Predictability of Turbulent Mixing with Implicit Large-eddy Simulation Book in PDF, ePub and Kindle
Under resolved computer simulations are typically unavoidable in many practical turbulent flow applications exhibiting extreme geometrical complexity and broad ranges of length and time scales. In such applications, coarse grained simulation becomes the effective simulation strategy, mostly by necessity rather than by choice. In coarse grained simulation strategies, resolved/unresolved scale separation is assumed possible, large energy containing structures are mostly resolved, smaller structures are spatially filtered out, and unresolved subgrid effects are modeled. The subject of this work is on implicit large-eddy simulation which relies on subgrid modeling implicitly provided by physics capturing numerical algorithms. Predictability issues of coarse grained simulation from the perspective of implicit large-eddy simulation of under resolved mixing of material scalars driven by under resolved velocity fields and initial conditions are addressed. The performance of implicit large-eddy simulation in the contexts of forced scalar mixing, transition to turbulence and turbulence decay, and shock-driven turbulent mixing is the particular focus.
Author | : Daniel Livescu |
Publisher | : Springer Nature |
Total Pages | : 273 |
Release | : 2020-02-19 |
Genre | : Technology & Engineering |
ISBN | : 9811526435 |
Download Modeling and Simulation of Turbulent Mixing and Reaction Book in PDF, ePub and Kindle
This book highlights recent research advances in the area of turbulent flows from both industry and academia for applications in the area of Aerospace and Mechanical engineering. Contributions include modeling, simulations and experiments meant for researchers, professionals and students in the area.
Author | : Cunha Galeazzo, Flavio Cesar |
Publisher | : KIT Scientific Publishing |
Total Pages | : 258 |
Release | : 2016-10-14 |
Genre | : Chemical engineering |
ISBN | : 3731504081 |
Download Simulation of Turbulent Flows with and without Combustion with Emphasis on the Impact of Coherent Structures on the Turbulent Mixing Book in PDF, ePub and Kindle
The analysis of turbulent mixing in complex turbulent flows is a challenging task. The effective mixing of entrained fluids to a molecular level is a vital part of the dynamics of turbulent flows, especially when combustion is involved. The work has shown the limitations of the steady-state simulations and acknowledged the need of applying high-fidelity unsteady methods for the calculation of flows with pronounced unsteadiness promoted by large-scale coherent structures or other sources.
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Release | : 2009 |
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Download On the Simulation of Shock-driven Material Mixing in High Reynolds-number Flows (u). Book in PDF, ePub and Kindle
Author | : Andrew Pollard |
Publisher | : Springer |
Total Pages | : 570 |
Release | : 2016-08-30 |
Genre | : Technology & Engineering |
ISBN | : 3319412175 |
Download Whither Turbulence and Big Data in the 21st Century? Book in PDF, ePub and Kindle
This volume provides a snapshot of the current and future trends in turbulence research across a range of disciplines. It provides an overview of the key challenges that face scientific and engineering communities in the context of huge databases of turbulence information currently being generated, yet poorly mined. These challenges include coherent structures and their control, wall turbulence and control, multi-scale turbulence, the impact of turbulence on energy generation and turbulence data manipulation strategies. The motivation for this volume is to assist the reader to make physical sense of these data deluges so as to inform both the research community as well as to advance practical outcomes from what is learned. Outcomes presented in this collection provide industry with information that impacts their activities, such as minimizing impact of wind farms, opportunities for understanding large scale wind events and large eddy simulation of the hydrodynamics of bays and lakes thereby increasing energy efficiencies, and minimizing emissions and noise from jet engines. Elucidates established, contemporary, and novel aspects of fluid turbulence - a ubiquitous yet poorly understood phenomena; Explores computer simulation of turbulence in the context of the emerging, unprecedented profusion of experimental data,which will need to be stewarded and archived; Examines a compendium of problems and issues that investigators can use to help formulate new promising research ideas; Makes the case for why funding agencies and scientists around the world need to lead a global effort to establish and steward large stores of turbulence data, rather than leaving them to individual researchers.
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Total Pages | : 4 |
Release | : 1995 |
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Download Turbulent Mix Experiments and Simulations Book in PDF, ePub and Kindle
Hydrodynamic instabilities produce material mixing that can significantly degrade weapons performance. We investigate the Richtmyer-Meshkov (RM) and Rayleigh-Taylor (RT) instabilities in the turbulent regime in two experimental venues. RM experiments are conducted on the Nova laser with strong radiatively driven shocks (Mach> 20) in planar, two fluid targets. Interfacial perturbations are imposed with single sinusoidal modes to test linear theory and with three dimensional (3D) random modes to produce turbulent mix. RT experiments are conducted on a new facility, the Linear Electric Motor (LEM), in which macroscopic fluids are accelerated with arbitrary temporal profiles. This allows detailed diagnosis of the turbulence over a wide range of conditions. The Nova experiments study the high compression regime whereas the LEM experiments are incompressible. The results are compared to hydrodynamic simulations with the arbitrary Lagrangian-Eulerian code (CALE). The goal is to develop and test engineering models of mix.