Numerical Simulations Of Mhd Flow Transition In Ducts With Conducting Hartmann Walls Limtech Project A3 D4 Tui
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Numerical Simulations Of Mhd Flow Transition In Ducts With Conducting Hartmann Walls Limtech Project A3 D4 Tui
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Author : Krasnov, D.
language : en
Publisher: KIT Scientific Publishing
Release Date : 2016-10-26
Numerical Simulations Of Mhd Flow Transition In Ducts With Conducting Hartmann Walls Limtech Project A3 D4 Tui written by Krasnov, D. and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-26 with categories.
Annual Report 2016 Of The Institute For Nuclear And Energy Technologies Kit Scientific Reports 7742
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Author : Schulenberg, Thomas
language : en
Publisher: KIT Scientific Publishing
Release Date : 2017-11-06
Annual Report 2016 Of The Institute For Nuclear And Energy Technologies Kit Scientific Reports 7742 written by Schulenberg, Thomas and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-06 with categories.
Mhd Flow In Rectangular Ducts With Inclined Non Uniform Transverse Magnetic Field
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Author :
language : en
Publisher:
Release Date : 1994
Mhd Flow In Rectangular Ducts With Inclined Non Uniform Transverse Magnetic Field written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
This paper examines the three-dimensional liquid metal MHD flow in rectangular ducts with thin conducting walls and with an inclined nonuniform transverse magnetic field. The Hartmann number and interaction parameter are assumed to be large and the magnetic Reynolds number is assumed to be small. Under these assumptions, viscous and inertial effects are confined to thin boundary layers adjacent to the walls. Outside these layers, the governing equations are significantly simplified. For validation of the numerical solutions, exact analytical solutions are derived for the case of a rectangular duct of equal wall thickness and with a uniform magnetic field. Comparisons of the exact analytical and numerical solutions give excellent agreement. Variation of the fully developed flow pressure gradient with the wall conductance ratio, aspect ratio, and magnetic angle is discussed. Numerical solutions are presented for flow in the varying field region where the flow is perturbed due to three-dimensional effects. The three-dimensional pressure drop, i.e., in excess of the locally fully developed pressure, is presented and its implication to a fusion blanket is discussed. The velocity distributions are also presented.
Mhd Flow In A Prototypical Manifold Of Dcll Blankets
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Author : Mistrangelo, Chiara
language : en
Publisher: KIT Scientific Publishing
Release Date : 2014-07-23
Mhd Flow In A Prototypical Manifold Of Dcll Blankets written by Mistrangelo, Chiara and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-23 with categories.
Numerical Simulations Of Mhd Flows Past Obstacles In A Duct Under Externally Applied Magnetic Field
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Author : V. Dousset
language : en
Publisher:
Release Date : 2009
Numerical Simulations Of Mhd Flows Past Obstacles In A Duct Under Externally Applied Magnetic Field written by V. Dousset and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Liquid Metal Mhd Flow In A Duct Whose Cross Section Changes From A Rectangle To A Trapezoid With Applicat I Ons In Fusion Blanket Designs
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Author : John S. Walker
language : en
Publisher:
Release Date : 1986
Liquid Metal Mhd Flow In A Duct Whose Cross Section Changes From A Rectangle To A Trapezoid With Applicat I Ons In Fusion Blanket Designs written by John S. Walker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Liquid Metal Mhd Flow In A Duct Whose Cross Section Changes From A Rectangle To A Trapezoid With Applications In Fusion Blanket Designs
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Author :
language : en
Publisher:
Release Date : 1986
Liquid Metal Mhd Flow In A Duct Whose Cross Section Changes From A Rectangle To A Trapezoid With Applications In Fusion Blanket Designs written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
This paper treats the liquid-metal MHD flow in a semi-infinite rectangular duct and a semi-infinite trapezoidal duct, which are connected by a finite-length transition duct. There is a strong, transverse, uniform magnetic field. The walls parallel to the magnetic field (sides) remain parallel, while the walls intersecting the magnetic field are twisted in the transition duct to provide the change in cross sectional shape. The left side has a constant height, while the height of the right side increases or decreases in the transition duct. This geometry gives a skewed velocity profile with a high velocity near the left side, provided the right side is relatively thick. All walls are thin and electrically conducting, but the sides are considerably thicker than the other walls. The application is to fusion-reactor blankets in which a high velocity near the first wall (separating the plasma chamber from the coolant) improves the thermal performance. Junctions of different ducts with walls parallel to the magnetic field are treated for the first time. In expansions, contractions and other geometric transition ducts, as well as in straight ducts with axially varying magnetic fields, the fluid flow and electric currents are concentrated in boundary layers adjacent to the sides and in the side. At a junction with a straight duct with a uniform magnetic field, the flow and current must transfer from the boundary layers adn sides to the core regions. These transfers at junctions play a key role in any three-dimensional flow.
Direct Numerical Simulation Of Transition And Turbulence In Magnetohydrodynamic Flows In Rectangular Ducts
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Author : Lee Braiden
language : en
Publisher:
Release Date : 2016
Direct Numerical Simulation Of Transition And Turbulence In Magnetohydrodynamic Flows In Rectangular Ducts written by Lee Braiden and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Experimental Investigation Of 3 D Mhd Flows At High Hartmann Number And Interaction Parameters
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Author :
language : en
Publisher:
Release Date : 1988
Experimental Investigation Of 3 D Mhd Flows At High Hartmann Number And Interaction Parameters written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.
Experimental investigations of 3-D MHD flows in uniform thin conducting wall ducts of circular and square cross section, conducted at Argonne National Laboratory's ALEX facility, are reported. The three-dimensional nature of the flow arises from the spacial variation of the applied transverse magnetic field. Measurements were performed at several Hartmann numbers, M, and interaction parameters, N, with the peak value for M exceeding 6 x 103 and the peak value for N exceeding 105. Typical results and their comparison to numerical analysis reported in a companion paper are given, as is a brief description of the ALEX facility and the experimental methods employed. Ongoing activities and plans for future experiments are also discussed. 6 refs., 3 figs.
Experimental And Theoretical Study Of Instabilities In Mhd Duct Flows With Inflectional Velocity Profiles
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Author : Jack Nathaniel Young
language : en
Publisher:
Release Date : 2019
Experimental And Theoretical Study Of Instabilities In Mhd Duct Flows With Inflectional Velocity Profiles written by Jack Nathaniel Young and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
This theoretical and experimental study focuses on instability in magnetohydrodynamic liquid metal fusion blanket duct flows with inflectional velocity profiles, the understanding of which is crucial to predictions of transitions between flow regimes in blanket systems. Flow regimes strongly affect heat and material advection across a poloidal blanket duct, and in the hopes of enhancing our capability to predict flow regimes and transport behavior in a wide range of blanket conditions, this study strives to uncover the mechanism behind MHD duct flow destabilization. This research builds on a large volume of theoretical, numerical and experimental work suggesting bulk instability and a two-stage mechanism as the most likely culprit for flow destabilization in these systems and supplies a much needed set of detailed experimental data to help validate numerical simulations and improve predictions of critical flow parameters, which have historically varied across orders of magnitude depending on the assumptions used to determine stability criteria for these flows. The derivation of an exact analytical solution for a fully-developed laminar electrically driven MHD duct flow with two wall jets is presented, which provides useful velocity field data that can help identify the laminar regime and helps determine the conditions required for quasi-two-dimensional (Q2D) flow. This is followed by a description of quasi-two-dimensional simulations of a duct-like electrically driven MHD cavity flow performed in parallel with an experiment with the same geometry and boundary conditions. Results from these two efforts are compared with the analytical solution and one another as a validation of their data, and key details of the flow dynamics and flow statistics are explored and used to identify the different types of instability present under a variety of conditions. The combination of these three avenues of research are leveraged to determine exactly how instabilities form in this system and through what stages they evolve as the flow approaches a transition to Q2D turbulence. The results are then used to develop tools that can more easily detect these regimes of instability from simple duct flow diagnostics.