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Friday, December 4, 2020 | History

3 edition of A time-accurate adaptive grid method and the numerical simulation of shock-vortex interaction found in the catalog.

A time-accurate adaptive grid method and the numerical simulation of shock-vortex interaction

A time-accurate adaptive grid method and the numerical simulation of shock-vortex interaction

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  • 37 Currently reading

Published by National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, For sale by the National Technical Information Service in [Washington, D.C.], Springfield, Va .
Written in English

    Subjects:
  • Numerical grid generation (Numerical analysis),
  • Computational grids.,
  • Computerized simulation.,
  • Grid generation (Mathematics),
  • Shock wave interaction.,
  • Vortices.

  • Edition Notes

    StatementMichael J. Bockelie, Peter R. Eiseman.
    SeriesNASA technical paper -- 2998.
    ContributionsEiseman, Peter R. 1942-, United States. National Aeronautics and Space Administration. Scientific and Technical Information Division., Langley Research Center.
    The Physical Object
    FormatMicroform
    Pagination17 p.
    Number of Pages17
    ID Numbers
    Open LibraryOL18257137M

    The evaluation of the velocities due to vortex and boundary elements, which constitute roughly 90% of the simulation cost, are accelerated via a scalably parallel adaptive fast multipole method (FMM) for distributed computing. At the 19th Annual Conference on Parallel Computational Fluid Dynamics held in Antalya, Turkey, in May , the most recent developments and implementations of large-scale and grid computing were presented. This book, comprised of the invited and selected papers of this conference, details Price: $ Senior Aerospace Engineer and Technical lead in the area of large scale multidisciplinary analysis tool development and applications. Served as a group lead for Computer Oriented Structural Analysis Group at National Aeronautical Lab (), Research associate at Purdue University (), Visiting Scientist at Air Force Flight Dynamics Laboratory of Wright Patterson AFB (). 2. The solution-adaptive philosophy in the Hybrid method drastically reduces the numerical dissipation, leading to much more accurate treatment of broadband turbulence. 3. More work is needed on reliable shock sensors, that work in a broad range of problems. 4.


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A time-accurate adaptive grid method and the numerical simulation of shock-vortex interaction Download PDF EPUB FB2

A time-accurate adaptive grid method and the numerical simulation of a shock-vortex interaction. is performed with a grid prediction correction method that is simple to implement and ensures the time accuracy of the grid.

Time accurate solutions of the 2-D Euler equations for an unsteady shock vortex interaction demonstrate the ability of Author: Michael J. Bockelie and Peter R.

Eiseman. A time accurate adaptive grid technique is established and applied to analyse the dynamics of a shock wave passing over a vortex. () Adaptive grid solution for shock-vortex interaction.

In: Dwoyer D.L., Hussaini M.Y., Voigt R.G. (eds) 11th International Conference on Numerical Methods in Fluid Dynamics. Lecture Notes in Physics, vol Cited by: 3. A time accurate adaptive grid technique is established and applied to analyse the dynamics of a shock wave passing over a vortex.

The components of the technique are a shock capturing technique, a grid movement scheme, and the coupling between them. The shock vortex interaction provides an idealized model for studying certain acoustic problems and problems associated with turbulence Cited by: 3.

A Time-Accurate Adaptive Grid Method and the Numerical Simulation of a Shock-Vortex Interaction Michael J. Bockelie Langley Research Center Hampton, Virginia Peter R. Eiseman Columbia University New York, New York.

Adaptive Multiresolution Methods for the Simulation of Shocks/Shear Layer Interaction in Confined Flows Chapter January with Reads How we measure 'reads'. Figure 3 shows an example of the adaptive grid b y. paper using the experimental method with a shock tube and the numerical technique.

The shock-vortex interaction generated by this model is. A time-accurate Navier–Stokes flow solver is developed for the simulation of unsteady viscous flow problems involving vortex dynamics using a solution-adaptive unstructured dynamic mesh procedure.

The solver is based on a second-order accurate implicit time integration using a point Gauss–Seidel relaxation scheme and a vertex-centered. 3. Modeling method Adaptive-grid numerical methods. A particular class of transport problems involves situations in which an interface or boundary moves over time.

These problems are known as Stefan problems and arise in a number of different fields. Shock diffraction over a two-dimensional wedge and subsequent shock–vortex interaction have been numerically simulated using the AUSM $$+$$ + scheme.

After the passage of the incident shock over the wedge, the generated tip vortex interacts with a reflected shock. The resulting shock pattern has been captured well. It matches the existing experimental and numerical results reported in the. Accuracy of the Adaptive GRP Scheme and the Simulation of 2-D Riemann Problems for Compressible Euler Equations - Volume 10 Issue 3 - Ee Han, Jiequan Li, Huazhong Tang.

The maximum admissible time step size of a DG method with a standard explicit global time stepping method is dictated by the smallest grid cell and the order of the polynomial approximation.

21, 22 A shortcoming of artificial viscosity‐based methods is the severe time step restriction caused by the second‐order term, eg, see the work of. Login / Register.

International Journal for Numerical Methods in Engineering. experiment,1–3 theoretical analysis,4–7 and direct numerical simulation.8–11 A brief summary of a shock-single vortex in-teraction is given in Zhang et al In addition, Zhang et al studied the interaction of a shock wave and a strong vortex.

It is found that the interaction between a shock wave and a strong vortex has a multistage. Numerical study of shock/vortex interaction in diatomic gas flows. Evaluation of some high-order shock capturing schemes for direct numerical simulation of unsteady two-dimensional free flows.

An adaptive grid method for computing time accurate solutions on structured grids. Get this from a library. A time-accurate adaptive grid method and the numerical simulation of shock-vortex interaction. [Michael J Bockelie; Peter R Eiseman; United States.

National Aeronautics and Space Administration. Scientific and Technical Information Division.; Langley Research Center.].

11th International Conference on Numerical Methods in Fluid Dynamics. Editors: Dwoyer, Douglas L., Hussaini, M. Yousuff, Adaptive grid solution for shock-vortex interaction. Pages Numerical simulation of the flow about a wing with leading-edge vortex flow.

Pages () A numerical study on a Cartesian-based body-fitted adaptive grid method. International Journal of Computational Fluid Dynam () A moving boundary flux stabilization method for Cartesian cut-cell grids using directional operator splitting. We present a moving adaptive grid method for solving the time-dependent Schrödinger equation, TDSE, for molecules in intense laser fields, applicable in the nonperturbative nonlinear regime where dissociation ionization occurs.

The method is based on a Lagrangian, moving coordinate system. In this representation, the reference system is moving with the laser pulse so that the classical.

A two-step online method is proposed for interpolating projection-based linear parametric reduced-order models (ROMs) in order to construct a new ROM for a new set of parameter values. The first step of this method transforms each precomputed ROM into a consistent set of generalized coordinates.

An adaptive grid refinement strategy for the simulation of negative streamers C. Montijn a,*,1, W. Hundsdorfer a,2, U. Ebert a,b,2 a Centrum voor Wiskunde en Informatica (CWI), Modelling, Analysis and Simulation (MAS), KruislaanP.O. BoxGB Amsterdam, The Netherlands b Department of Physics, TU Eindhoven, MB Eindhoven, The Netherlands.

If the address matches an existing account you will receive an email with instructions to reset your password. Semi-implicit and Implicit Solutions of Pulsatile Flow in the Axisymmetric Tube Using a Staggered Grid.- Application of the CIP Method to the Simulation of the Laser-Matter Interaction.- Numerical Analysis of Transport Properties in Turbulent Premixed Flames.- Lagrangian Block Method.- Grid Generation Based on Harmonic Maps A new adaptive dynamic multi-grid method is developed for simulation on evolving damage in concrete column under seismic loading.

The method should possess adaptive capability in order to carry out automatically coupling analysis without user intervention in the computation. As a case study of the method, the process of evolving damage to failure of a concrete column under seismic loading is. Modelling shock/turbulent-boundary-layer interaction with a cell-vertex scheme and second-moment closure.

Pages Numerical simulation of non-equilibrium hypersonic flow using the second-order boundary layer equations. A general purpose time accurate adaptive grid method. Numerical simulation of the flow in a Pelton turbine using the meshless method smoothed particle hydrodynamics: A new simple solid boundary treatment.

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, (6), – A domain decomposition approach has been developed to solve for flow around multiple objects.

The method combines features of mask and multigrid algorithm implemented within the general framework of a primitive variable, pseudospectral elements formulation of fluid flow problems.

observed in the interaction of a shock with a single vortex, the authors suspected that this was due to the limitation of the computational domain and the short simulation time. Later, Inoue19 performed a numerical simulation with a larger domain and for a longer time, and observed the third sound wave.

"A third-order implicit discontinuous Galerkin method based on a Hermite WENO reconstruction for time-accurate solution of the compressible Navier-Stokes equations", International Journal for Numerical Methods in Fluids, 79(8):) is a good candidate to renew the dynamical cores employed in environmental flows models.

When a time-varying grid is used with grid-points that sediment like point particles r i (t) = r i (0)exp{ω 2 s(t-t 0)}, a moving frame of reference is established so that simulation of sedimentation reduces to a diffusion problem, which can be solved with greater stability for large particles.

The logarithmically spaced grid. J Anisotropic Solution-Adaptive Vis-cous Cartesian Grid Method for Turbulent Flow Simulation J Direct Numerical Simulation of Turbu-lent Trailing-Edge Flow with Base Flow Control J Effects of Pressure-Sensitive Paint on Experimentally Measured Wing Forces and Pressures J Time-Accurate Inlet and Outlet Condi.

of ‘numerical diffusion’ or ‘numerical dispersion’ [35,64,65] ARTICLE IN PRESS COMPHY Please cite this article in press as: P.H. Brown, P. Schuck, A new adaptive grid-size algorithm for the simulation of sedimentation velocity profiles in analytical.

dimensional The final numerical report is methodology divided into and three typical sections. two-dimensional Chapter 1 describes computation, in detaMl I.e., the the two-appli-cation of the numerical methodology to the simulation of shock interaction with a typical 2.

The goal of this project was to investigate the utility of parallel adaptive mesh refinement (AMR) in the simulation of laser plasma interaction (LPI). The scope of work included the development of new numerical methods and parallel implementation strategies.

Adaptive Choice of Grid and Time in Reinforcement Learning trol for ordinary differential equations and calculations for the rates of convergence of fully discrete solutions of the Bellman-equation (see [3]).

We explain how both methods can be combined and applied to Q-Iearning. A simple numerical example. The U.S. Department of Energy's Office of Scientific and Technical Information.

T1 - Numerical investigation of oblique shock wave/vortex interaction. AU - Magri, Valerio. AU - Kalkhoran, Iraj M. PY - /11/5. Y1 - /11/5. N2 - The purpose of the present study was to investigate the interaction between stream-wise vortices with oblique shock fronts of various intensities.

Adaptive Monte Carlo Methods Adaptive Monte Carlo methods are designed to adaptively tune simulation esti-mators as the simulation progresses, with the purpose of improving efficiency. One needs to have a good understanding of the structure of the system being simulated in order to appropriately apply adaptive methods.

Numerical simulation of the interaction of a shock with either a single vortex or a vortex pair are used to investigate the resulting shock structure, production of acoustic waves, vortex distortion, and vorticity amplifica- showed that the shock-vortex interaction produced a The domain is 20 x 10 cm2 and consists of a x uniform.

Unsteady Shock-Vortex Interaction on a Flexible Delta Wing S. Obi and M. Peric A Co-located Finite-Volume Method for Non-Orthogonal Grids with a Second-Moment Turbulence Closure, T. Ogawa, K. Fujii, and Y. Tamura Numerical Simulation of Compressible Flows Induced by an Object Moving into a Duct Computational simulation and study of shock/vortex interaction and vortex-breakdown modes are considered for bound (internal) and unbound (external) flow domains.

The first time-accurate NS solution for a supersonic vortex breakdown was developed by the present authors in Ref. [10]. flow of M_ =is considered. A grid of x51x2 in. Adaptive methods offer a means of tackling complex flow problems at a reasonable cost and of controlling the accuracy of numerical simulations.

Adaptive grids based on quadtree decomposition methods can be employed to efficiently refine the generated grid in regions where more accuracy is required. In some grid-embedding. The development of unstructured grid-based, finite-element methods for the simulation of fluid flows is reviewed.

The review concentrates on solution techniques for the compressible Euler and Navier-Stokes equations, employing methods which are based upon a Galerkin discretization in space together with an appropriate finite-difference representation in time.Variable high-order multiblock overlapping grid methods for mixed steady and unsteady multiscale viscous flows, part II: hypersonic nonequilibrium flows.

Commun. Comput.