Download or read book Numerical Simulations of Magnetohydrodynamic Flow and Heat Transfer written by Amar KC and published by . This book was released on 2014 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetohydrodynamic (MHD) natural convection in a porous medium with low-magnetic Reynolds number (Re[subscript m]) is investigated in a rectangular cavity with isothermal walls on the left and right and adiabatic walls on the top and bottom. The validity of Darcy's law is addressed for high-Rayleigh number (Ra) flows with high permeability, where the velocity-pressure gradient relationship transitions from linear (i.e. the Darcy law) to nonlinear, due to the fact that the form drag due to solid obstacles is now comparable with the surface drag due to friction, which in turn results in the Darcy-Forchheimer law. In addition, the effect of different magnetic field strengths in terms of Hartmann numbers (Ha) is also investigated for cavities for varying aspect ratios to analyze how the flow and thermal characteristics in a porous medium are influenced by the applied magnetic field. Here, the interaction between the fluid velocity and the electromagnetic forces gives rise to different flow scenarios. In particular, the influence of magnetic field under the varying conditions of convective currents (through Ra) and length scales (through aspect ratios) on quantities such as stream function, temperature and Nusselt number, Nu is studied. Assessment of three regularization-based models and two eddy-viscosity-based subgrid-scale (SGS) turbulence models for large eddy simulations (LES) are carried out for MHD decaying homogeneous turbulence (DHT) and MHD transition to turbulence for the Taylor-Green vortex (TGV) through comparisons to direct numerical simulations (DNS). Simulations are conducted using the low-magnetic Reynolds number approximation (Re[subscript m] “ 1) and the initially-isotropic turbulence problem has a Taylor scale Reynolds number (Re[subscript lambda]) of 120. LES predictions using the Leray-[alpha], LANS-[alpha], and Clark-[alpha] regularization-based SGS models are compared to the classic non-dynamic Smagorinsky and the dynamic Smagorinsky models. Regarding the regularization models, this work represents their first application to MHD decaying turbulence or transition-to-turbulence problems. Analyses of turbulent kinetic energy decay rates, energy spectra, and vorticity fields are made between the varying magnetic field cases. Overall, the regularization models did poorly compared to the eddy-viscosity models for all MHD cases, but the comparisons improved as the magnetic field increase in magnitude.

Download or read book Numberical Simulation of Magnetohydrodynamic MHD Effect on Forced Natural and Mixed Convection Flows written by Dipin Kalapurakal and published by . This book was released on 2012 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: The accurate simulation of magnetohydrodynamic (MHD) flows and heat transfer is critical to the understanding of the complex physics in liquid metal flows for coolant and breeder blankets used in fusion power plants such as tokamaks, metallurgy, aerospace applications and crystal growth. These issues will be addressed through an effort investigating low-magnetic Reynolds number (Rem), high-Hartmann number (Ha), MHD flows in a square cavity, using a 2D parallel vorticity-streamfunction-based incompressible Navier-Stokes code. Numerical simulations of MHD flow and heat transfer are carried out in a square cavity with emphasis on specific classical benchmark problems like the lid-driven cavity with and without heat transfer (forced convection), natural convection and mixed convection (forced + natural). Effects of Ha and Pr are investigated to assess MHD in heat transfer under various conditions. Quantities analyzed include streamfunction, vorticity, velocities, temperature and Nusselt number. Computations are carried out on in-house supercomputing desktops and clusters. This study provides a fundamental understanding of MHD effects on flow behavior and heat transfer in the context of a series of simple benchmark problems. Also created through this effort is an accurate and effcient incompressible code capable of calculating a variety of added complex physics in fluid mechanics.

Download or read book Numerical Simulation written by Ricardo Lopez-Ruiz and published by BoD – Books on Demand. This book was released on 2016-08-24 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays mathematical modeling and numerical simulations play an important role in life and natural science. Numerous researchers are working in developing different methods and techniques to help understand the behavior of very complex systems, from the brain activity with real importance in medicine to the turbulent flows with important applications in physics and engineering. This book presents an overview of some models, methods, and numerical computations that are useful for the applied research scientists and mathematicians, fluid tech engineers, and postgraduate students.

Download or read book Nanofluid in Heat Exchangers for Mechanical Systems written by Zhixiong Li and published by Elsevier. This book was released on 2020-04-09 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanofluid in Heat Exchanges for Mechanical Systems: Numerical Simulation shows how the finite volume method is used to simulate various applications of heat exchanges. Heat transfer enhancement methods are introduced in detail, along with a hydrothermal analysis and second law approaches for heat exchanges. The melting process in heat exchanges is also covered, as is the influence of variable magnetic fields on the performance of heat exchange. This is an important reference source for materials scientists and mechanical engineers who are looking to understand the main ways that nanofluid flow is simulated and applied in industry. Provides detailed coverage of major models used in nanofluid analysis, including the finite volume method, governing equations for turbulent flow, and equations of nanofluid in presence of variable magnetic field Offers detailed coverage of swirling flow devices and melting processes Assesses which models should be applied in which situations

Download or read book Magnetohydrodynamics written by Peter A. Davidson and published by Springer Science & Business Media. This book was released on 2002-07-30 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to terrestial magnetohydrodynamics. It is a compendium of introductory lectures by experts in the field, focussing on applications in industry and the laboratory. A concise overview of the subject with references to further study.

Download or read book Numerical Simulation and Active Boundary Control of Magnetohydrodynamic Channel Flow written by Lixiang Luo and published by . This book was released on 2010 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: An electrically conductive fluid flowing inside a channel is prone to be affected by enormous magnetohydrodynamics (MHD) effects, which often lead to high pressure gradients and low heat transfer rates. These effects are especially undesirable in many cooling systems where the MHD effects are inevitable. The performance of the heat exchange systems can be affected by the manipulation of the flow stability using active boundary controls. In this research we seek out active boundary control schemes which can potentially improve the performance of the heat exchange systems.

Download or read book Applications of Fluid Dynamics written by M.K. Singh and published by Springer. This book was released on 2017-11-04 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents high-quality papers presented at 3rd International Conference on Applications of Fluid Dynamics (ICAFD 2016) organized by Department of Applied Mathematics, ISM Dhanbad, Jharkhand, India in association with Fluid Mechanics Group, University of Botswana, Botswana. The main theme of the Conference is "Sustainable Development in Africa and Asia in context of Fluid Dynamics and Modeling Approaches". The book is divided into seven sections covering all applications of fluid dynamics and their allied areas such as fluid dynamics, nanofluid, heat and mass transfer, numerical simulations and investigations of fluid dynamics, magnetohydrodynamics flow, solute transport modeling and water jet, and miscellaneous. The book is a good reference material for scientists and professionals working in the field of fluid dynamics.

Download or read book Numerical Simulations in Engineering and Science written by Srinivasa Rao and published by BoD – Books on Demand. This book was released on 2018-07-11 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational science is one of the rapidly growing multidisciplinary fields. The high-performance computing capabilities are utilized to solve and understand complex problems. This book offers a detailed exposition of the numerical methods that are used in engineering and science. The chapters are arranged in such a way that the readers will be able to select the topics appropriate to their interest and need. The text features a broad array of applications of computational methods to science and technology. This book would be an interesting supplement for the practicing engineers, scientists, and graduate students.

Download or read book Applications of Magnetohydrodynamics for Heat Transfer Enhancement written by Mehdi Fakour and published by Cambridge Scholars Publishing. This book was released on 2023-06-16 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about magnetohydrodynamics, explaining how magnetic fields can induce currents within a moving conductive fluid, which in turn creates forces on the fluid and influences the magnetic field itself. The book explains its governing equations and discusses free, forced and mixed convection heat transfers of nanofluids. The models discussed in the book have applications in various fields, including mathematics, physics, biology, medicine, engineering, nanotechnology, and materials science. This book will be of use to professionals, researchers, scientists, policy makers, and students with a keen interest within this field. This book provides an understanding of the fundamentals of new numerical and analytical methods, acting as a remedy for the lack of convenient and integrated sources of information in this specific field of study.

Download or read book Application of Control Volume Based Finite Element Method CVFEM for Nanofluid Flow and Heat Transfer written by Mohsen Sheikholeslami and published by Elsevier. This book was released on 2018-09-14 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt: Application of Control Volume Based Finite Element Method (CVFEM) for Nanofluid Flow and Heat Transfer discusses this powerful numerical method that uses the advantages of both finite volume and finite element methods for the simulation of multi-physics problems in complex geometries, along with its applications in heat transfer and nanofluid flow. The book applies these methods to solve various applications of nanofluid in heat transfer enhancement. Topics covered include magnetohydrodynamic flow, electrohydrodynamic flow and heat transfer, melting heat transfer, and nanofluid flow in porous media, all of which are demonstrated with case studies. This is an important research reference that will help readers understand the principles and applications of this novel method for the analysis of nanofluid behavior in a range of external forces. Explains governing equations for nanofluid as working fluid Includes several CVFEM codes for use in nanofluid flow analysis Shows how external forces such as electric fields and magnetic field effects nanofluid flow

Download or read book Computational Simulations of Supersonic Magnetohydrodynamic Flow Control Power and Propulsion Systems written by Tian Wan and published by . This book was released on 2007 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book External Magnetic Field Effects on Hydrothermal Treatment of Nanofluid written by Mohsen Sheikholeslami and published by William Andrew. This book was released on 2016-03-08 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book seeks to comprehensively cover recent progress in computational fluid dynamics and nonlinear science and its applications to MHD and FHD nanofluid flow and heat transfer. The book will be a valuable reference source to researchers in various fields, including materials science, nanotechnology, mathematics, physics, information science, engineering and medicine, seeing to understand the impact of external magnetic fields on the hydrothermal behavior of nanofluids in order to solve a wide variety of theoretical and practical problems. Readers will gain a full understanding of the fundamentals in new numerical and analytical methods in MHD (Magnetohydrodynamics) Includes complete coverage of governing equations in which nanofluid is used as working fluid, and where magnetic fields are applied to nanofluids A single-source reference covering recent progress in computational fluid dynamics and nonlinear science, and its applications to MHD and FHD nanofluid flow and heat transfer

Download or read book Modern Developments in Numerical Simulation of Flow and Heat Transfer written by James L. S. Chen and published by . This book was released on 1992 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Optimization of Numerical Simulations of Heat Transfer and Fluid Flow written by Matt Blomquist and published by . This book was released on 2019 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical methods to simulate heat transfer and fluid flow phenomena. These numerical simulations require the solution of large linear algebraic systems that arise from the discretization of governing equations and the number of nodes in the discretized mesh is directly related to the accuracy of the simulation. A finer mesh, one with more nodes, will result in better numerical accuracy. However, the computational resources required to solve the linear systems and the overall solution time of the simulation increases with an increased number of nodes. As practitioners continue to develop more complex simulations that require fine meshes, the need for better methods to solve linear systems becomes particularly important. In recent years, there have been significant advancements in computational hardware that have enabled massive parallelism. Multicore processors, graphics processing units, and increased memory capacity have all lead way to significant performance increases for high-performance computing (HPC) workflows that allow for faster and more accurate numerical simulations. However, many of the legacy algorithms used to solve the linear systems in CFD are not well suited to exploit the parallelism in modern computational hardware. Krylov-subspace methods are an ideal solution to this problem as the Krylov algorithms can be parallelized through single-instruction, multiple data (SIMD) operations. In the current study, the Krylov-subspace methods of Bi-Conjugate Gradients, Generalized Minimum Residual, Bi-Conjugate Gradients Stabilized, and Bi-Conjugate Gradients Stabilized (l) are examined as potential algorithms to improve the solution time for numerical simulations of heat transfer and fluid flow. Each of the Krylov methods will be characterized against the standard, line-by-line Tri-Diagonal Matrix Algorithm using a heat conduction model and a Rayleigh-Bénard Convection model. The numerical experiments using heat conduction will examine the impact of grid size and boundary condition placement for each of the algorithms tested. The Rayleigh-Bénard Convection model will be used to determine the performance improvements of the Krylov methods in Patankar's SIMPLER algorithm. The numerical accuracies of each algorithm will be validated using analytical solutions for the heat conduction model and empirical correlations for the Rayleigh-Bénard Convection model.

Download or read book Mathematical Fluid Mechanics written by B. Mahanthesh and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-06-08 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Without mathematics no science would survive. This especially applies to the engineering sciences which highly depend on the applications of mathematics and mathematical tools such as optimization techniques, finite element methods, differential equations, fluid dynamics, mathematical modelling, and simulation. Neither optimization in engineering, nor the performance of safety-critical system and system security; nor high assurance software architecture and design would be possible without the development of mathematical applications. De Gruyter Series on the Applications of Mathematics in Engineering and Information Sciences (AMEIS) focusses on the latest applications of engineering and information technology that are possible only with the use of mathematical methods. By identifying the gaps in knowledge of engineering applications the AMEIS series fosters the international interchange between the sciences and keeps the reader informed about the latest developments.

Download or read book Numerical Mathematics and Advanced Applications ENUMATH 2019 written by Fred J. Vermolen and published by Springer Nature. This book was released on 2021-04-30 with total page 1185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers outstanding papers presented at the European Conference on Numerical Mathematics and Advanced Applications (ENUMATH 2019). The conference was organized by Delft University of Technology and was held in Egmond aan Zee, the Netherlands, from September 30 to October 4, 2019. Leading experts in the field presented the latest results and ideas regarding the design, implementation and analysis of numerical algorithms, as well as their applications to relevant societal problems. ENUMATH is a series of conferences held every two years to provide a forum for discussing basic aspects and new trends in numerical mathematics and scientific and industrial applications, all examined at the highest level of international expertise. The first ENUMATH was held in Paris in 1995, with successive installments at various sites across Europe, including Heidelberg (1997), Jyvaskyla (1999), lschia Porto (2001), Prague (2003), Santiago de Compostela (2005), Graz (2007), Uppsala (2009), Leicester (2011), Lausanne (2013), Ankara (2015) and Bergen (2017).

Download or read book Mathematical Modelling of Fluid Dynamics and Nanofluids written by Katta Ramesh and published by CRC Press. This book was released on 2023-09-29 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical Modelling of Fluid Dynamics and Nanofluids serves as a comprehensive resource for various aspects of fluid dynamics simulations, nanofluid preparation, and numerical techniques. The book examines the practical implications and real-world applications of various concepts, including nanofluids, magnetohydrodynamics, heat and mass transfer, and radiation. By encompassing these diverse domains, it offers readers a broad perspective on the interconnectedness of these fields. The primary audience for this book includes researchers and graduate students who possess a keen interest in interdisciplinary studies within the realms of fluid dynamics, nanofluids, and biofluids. Its content caters to those who wish to deepen their knowledge and tackle complex problems at the intersection of these disciplines.