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Modeling Plasma Flow In A Magnetic Nozzel With The Lattice Boltzmann Method
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Book Synopsis Modeling Plasma Flow in a Magnetic Nozzel with the Lattice-Boltzmann Method by : Frans Hendrik Ebersohn
Download or read book Modeling Plasma Flow in a Magnetic Nozzel with the Lattice-Boltzmann Method written by Frans Hendrik Ebersohn and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic nozzles must convert thermal or gyro energy of the plasma to thrust while also inducing plasma detachment in order to be effective. Plasma detachment and methods to induce plasma detachment are examined. In particular, super Alfvénic detachment and resistive detachment are examined. A parametric study of the plasma flow is conducted. Plasma flow through a magnetic nozzle is simulated using a three-dimensional, timedependent magnetohydrodynamics (MHD) model. The MHD equations are modeled using the lattice-Boltzmann method and the linearized Boltzmann equation with the Bhatnagar-Gross-Krook operator for collisions. This thesis presents simulations of configurations and conditions related to the VASIMR propulsion scheme. This research demonstrates plasma detachment using resistive and super Alfvénic mechanisms by modeling plasma flow with the Lattice Boltzmann Method.
Book Synopsis Lattice Boltzmann Simulation of Laser Interaction with Weakly Ionized Plasmas by : Huayu Li
Download or read book Lattice Boltzmann Simulation of Laser Interaction with Weakly Ionized Plasmas written by Huayu Li and published by . This book was released on 2008 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computer Simulation of Plasma Confinement and Flow in a Magnetic Nozzle System by : Pavlos George Mikellides
Download or read book Computer Simulation of Plasma Confinement and Flow in a Magnetic Nozzle System written by Pavlos George Mikellides and published by . This book was released on 1989 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Modeling of Plasma Detachment from a Magnetic Nozzle by : Mikhail R. Tushentsov
Download or read book Numerical Modeling of Plasma Detachment from a Magnetic Nozzle written by Mikhail R. Tushentsov and published by . This book was released on 2010 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The numerical simulation and modeling of plasma detachment from a magnetic nozzle is presented. The detachment problem is of key importance to the plasma-based propulsion concepts that employ a guiding magnetic field to control plasma flow and motivated by the needs of the VASIMR (Variable Specific Impulse Magnetoplasma Rocket) project. The detachment of the plasma exhaust is required to produce directed thrust. In the present scenario plasma can stretch the magnetic field lines to infinity, similar to the solar wind. In order to extend the magnetic nozzle model beyond the limitations of analytic theory, a numerical code is developed to simulate steady-state kinetic plasma flows and to evaluate nozzle efficiency. The direct solution of a steady-state problem, as opposed to an initial value problem, eliminates the need to deal with transient phenomena that are of secondary importance for continuously operated plasma thrusters. The new simulation code is verified against the analytic results and then used to model the plasma behaviour for the conditions of the Detachment Demonstration Experiment (DDEX) at the NASA Marshall Propulsion Research Center, Huntsville, Alabama.
Book Synopsis Axisymmetric Expansion of a Plasma in a Magnetic Nozzle Including Thermal Conduction by : Eddie L. Walker
Download or read book Axisymmetric Expansion of a Plasma in a Magnetic Nozzle Including Thermal Conduction written by Eddie L. Walker and published by . This book was released on 1971 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Plasma Flow Through Magnetic Nozzles by : Richard A. Gerwin
Download or read book Characterization of Plasma Flow Through Magnetic Nozzles written by Richard A. Gerwin and published by . This book was released on 1990 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is an account of research undertaken to describe the steady, axisymmetric flow of plasmas through rocket nozzles, with attention directed to the use of magnetic fields for guiding or propelling the plasmas. The primary emphasis is on simply connected nozzles containing strictly longitudinal (B sub r, O, B sub z) magnetic fields to guide the plasma, with secondary consideration given to annular nozzles containing strictly azimuthal (O, B sub theta, O) magnetic fields to propel the plasma. The possibility and desirability of using hot plasmas in a repetitive mode is discussed, and motivates our consideration of an extensive range of parameters. Although slightly ionized gases having low temperatures (a fracture of an eV) and low magnetic Reynolds numbers often are the objects of valid and useful research (for example, in connection with MHD generators, with MPD thrusters, and with arc heaters to provide sources of hot gas for expanding gas-dynamic flow fields), the focus is upon the effective and efficient interaction of substantial plasmas with guiding or driving magnetic fields. Thus, focus is primarily on highly ionized plasmas that are not dominated by resistive dissipation. Some of the principal physics issues associated with these concepts are addressed, including the assumptions and limitations of the ideal MHD model, the magnitude and scaling of classical and anomalous transport losses and of radiation losses in hydrogen plasma during transit of plasma through the nozzle, and the transport-related detachment problem of how the plasma leaves the exit region of the nozzle.
Book Synopsis Plasma Flow Processes Within Magnetic Nozzle Configurations by : Thomas M. York
Download or read book Plasma Flow Processes Within Magnetic Nozzle Configurations written by Thomas M. York and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Interaction Between a Plasma Flow and a Magnetic Nozzle with Strong Hall Effect by :
Download or read book The Interaction Between a Plasma Flow and a Magnetic Nozzle with Strong Hall Effect written by and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gas Kinetic Study of Magnetic Field Effects on Plasma Plumes by : Frans Hendrik Ebersohn
Download or read book Gas Kinetic Study of Magnetic Field Effects on Plasma Plumes written by Frans Hendrik Ebersohn and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma flow physics in magnetic nozzles must be clearly understood for optimal design of plasma propulsion devices. Toward that end, in this thesis we: i) perform an extensive literature survey of magnetic nozzle physics, ii) assess the validity of magnetohydrodynamics for studying magnetic nozzle physics, and iii) illustrate the effects of the Hall term in simple flows as well as in magnetic nozzle configurations through numerical experiments with the Magneto-Gas Kinetic Method (MGKM). The crucial steps necessary for thrust generation in magnetic nozzles are energy conversion, plasma detachment, and momentum transfer. These three physical phenomena must be understood to optimize magnetic nozzle design. The operating dimensionless parameter ranges of six prominent experiments are considered and the corresponding mechanisms are discussed. An order of magnitude analysis of the governing equations reveal: i) most magnetic nozzles under consideration operate at the edge of the continuum regime rendering continuum-based description and computation valid; ii) in the context of MHD framework, the generalized Ohm's law must be used to capture all of the relevant physics. This work also continues the development of the Magneto Gas Kinetic Method (MGKM) computational tool. Validation of the solver is performed in shock-tube and Hartmann channel flows in the Hall physics regime. Comparison with theory and available data is made whenever possible. Novel numerical experiments of magnetic nozzle plasma jets in the Hall regime are performed, confirming the theoretically predicted azimuthal rotation of the plasma jet due to Hall physics. The primary conclusion from this work is that the addition of the Hall effect generates helical structures in magnetic nozzle plasma flows. Preliminary results are encouraging for future magnetic nozzle studies and further challenges are identified. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148434
Download or read book Shock Waves written by Klaus Hannemann and published by Springer Science & Business Media. This book was released on 2009-04-05 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 26th International Symposium on Shock Waves in Göttingen, Germany was jointly organised by the German Aerospace Centre DLR and the French-German Research Institute of Saint Louis ISL. The year 2007 marked the 50th anniversary of the Symposium, which first took place in 1957 in Boston and has since become an internationally acclaimed series of meetings for the wider Shock Wave Community. The ISSW26 focused on the following areas: Shock Propagation and Reflection, Detonation and Combustion, Hypersonic Flow, Shock Boundary Layer Interaction, Numerical Methods, Medical, Biological and Industrial Applications, Richtmyer Meshkov Instability, Blast Waves, Chemically Reacting Flows, Diagnostics, Facilities, Flow Visualisation, Ignition, Impact and Compaction, Multiphase Flow, Nozzles Flows, Plasmas and Propulsion. The two Volumes contain the papers presented at the symposium and serve as a reference for the participants of the ISSW 26 and individuals interested in these fields.
Book Synopsis Computational Methods for Kinetic Models of Magnetically Confined Plasmas by : J. Killeen
Download or read book Computational Methods for Kinetic Models of Magnetically Confined Plasmas written by J. Killeen and published by Springer. This book was released on 2012-05-04 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because magnetically confined plasmas are generally not found in a state of thermodynamic equilibrium, they have been studied extensively with methods of applied kinetic theory. In closed magnetic field line confinement devices such as the tokamak, non-Maxwellian distortions usually occur as a result of auxiliary heating and transport. In magnetic mirror configurations even the intended steady state plasma is far from local thermodynamic equilibrium because of losses along open magnetic field lines. In both of these major fusion devices, kinetic models based on the Boltzmann equation with Fokker-Planck collision terms have been successful in representing plasma behavior. The heating of plasmas by energetic neutral beams or microwaves, the production and thermalization of a-particles in thermonuclear reactor plasmas, the study of runaway electrons in tokamaks, and the performance of two-energy compo nent fusion reactors are some examples of processes in which the solution of kinetic equations is appropriate and, moreover, generally necessary for an understanding of the plasma dynamics. Ultimately, the problem is to solve a nonlinear partial differential equation for the distribution function of each charged plasma species in terms of six phase space variables and time. The dimensionality of the problem may be reduced through imposing certain symmetry conditions. For example, fewer spatial dimensions are needed if either the magnetic field is taken to be uniform or the magnetic field inhomogeneity enters principally through its variation along the direction of the field.
Book Synopsis The Iterative Monte Carlo Technique for Collisionless Plasma Flow to a Surface by :
Download or read book The Iterative Monte Carlo Technique for Collisionless Plasma Flow to a Surface written by and published by . This book was released on 1993 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new technique for modelling the boundary plasma of magnetic fusion devices is described. The technique represents a natural extension of existing Monte Carlo codes, which are presently constrained to have the plasma background specified by either measurements or predictions from plasma fluid codes. The new approach, the Iterative Monte Carlo (IMC) technique, self-consistently determines the ambipolar electric field in the plasma by feeding back into the simulation the evolving plasma density using the Boltzmann relation. The IMC technique is applied, for demonstrative purposes, to the problem of collisionless one-dimensional plasma flow to a surface. Such a problem has previously been solved exactly using kinetic approaches in the published literature using two different particle source functions. Good agreement between the IMC results and the exact solutions is obtained.
Book Synopsis A Numerical Simulation of Axisymmetric, Steady-state Plasma Flow with Self-induced and Applied Magnetic Fields by : Herbert Thomas
Download or read book A Numerical Simulation of Axisymmetric, Steady-state Plasma Flow with Self-induced and Applied Magnetic Fields written by Herbert Thomas and published by . This book was released on 1991 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study on Free Surface and Channel Flow Induced by Low-Temperature Plasma Via Lattice Boltzmann Method by :
Download or read book Study on Free Surface and Channel Flow Induced by Low-Temperature Plasma Via Lattice Boltzmann Method written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Active boundary layer flow control and boundary layer manipulation in the channel flow that was based on low temperature plasma were studied by means of a lattice Boltzmann method. Two plasma actuators were placed in a row to obtain the influence rule of their separation distance on the velocity profile at three locations and maximum velocity in the flow field. Two plasma actuators were placed symmetrically inside a channel to examine the effect of channel height and voltage on the velocity profile and flow rate. It was found that the channel height controls the distribution of flow velocity, which affected the flow rate and its direction. Increasing plasma voltage had a negative effect on the flow rate due to the generation of a larger and stronger flow vortex.
Book Synopsis Modeling of the Plasma Flow in High-power TAL by : Michael Keidar
Download or read book Modeling of the Plasma Flow in High-power TAL written by Michael Keidar and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Qualitative Spectroscopic Study of Magnetic Nozzle Flow for a Quasi-steady Plasma Thruster by : Tomokazu Umeki
Download or read book Qualitative Spectroscopic Study of Magnetic Nozzle Flow for a Quasi-steady Plasma Thruster written by Tomokazu Umeki and published by . This book was released on 1992 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
