Proceedings ArticleDOI
Recent enhancements to OVERFLOW
Reads0
Chats0
TLDR
The purpose of this paper is to highlight some recent enhancements that have been made to the Navier-Stokes code OVERFLOW, in three major areas: a multigrid method, for convergence acceleration; a lowMach preconditioning algorithm, for converge acceleration and solution quality improvement for low Mach number flows; and a matrix dissipation algorithm for solution quality improved.Abstract:
The purpose of this paper is to highlight some recent enhancements that have been made to the Navier-Stokes code OVERFLOW. The enhancements we are concerned with are in three major areas: a multigrid method, for convergence acceleration; a lowMach preconditioning algorithm, for convergence acceleration and solution quality improvement for low Mach number flows; and a matrix dissipation algorithm for solution quality improvement. We will describe these methods and show examples of their efficacy.read more
Citations
More filters
Proceedings ArticleDOI
Characterization of the Space Shuttle Ascent Debris using CFD Methods
TL;DR: Characterization of Space Shuttle Ascent Debris using CFD Methods usingCFD Methods and its Applications 2020-02-17T11-44:19+00:00Z.
Proceedings ArticleDOI
Grid Resolution and Turbulence Model Effects on Space Capsule Navier-Stokes Simulations
TL;DR: The purpose of this analysis is to determine the methods and requirements of grid generation and flow solver execution that will produce high quality aerodynamic coefficients for similar space capsule geometries.
Proceedings ArticleDOI
Effects of Jet-Interaction on Pitch Control of a Launch Abort Vehicle
TL;DR: Investigations of Jet Interaction showed that adverse JI occurs at positive angles-of-attack when the ACM jets screen the LAV tower from the oncoming flow, which causes ACM authority to drop dramatically at positive α over Mach numbers from 0.7-1.6, and can result in control reversal for some flight conditions.
Proceedings ArticleDOI
Separation Prediction of Large Separation with Reynolds Stress Models
Michael E. Olsen,Randolph P. Lillard,Scott M. Murman,Melissa B. Rivers,Kurtis R. Long,James C. Ross +5 more
Proceedings ArticleDOI
Progress in CFD Discretizations, Algorithms and Solvers for Aerodynamic Flows
TL;DR: An overview of developments in computational fluid dynamic discretizations and solution techniques for aerodynamic applications over the past five to six year time frame and prospects for further advances towards long term milestones and Grand Challenge projects as outlined in the CFD2030 report are given.
References
More filters
Book
An Introduction to Multigrid Methods
TL;DR: These notes were written for an introductory course on the application of multigrid methods to elliptic and hyperbolic partial differential equations for engineers, physicists and applied mathematicians, restricting ourselves to finite volume and finite difference discretization.
Journal ArticleDOI
A diagonal form of an implicit approximate-factorization algorithm
Thomas H. Pulliam,D.S Chaussee +1 more
TL;DR: The modification transforms the coupled system of equations into an uncoupled diagonal form that requires less computational work and has an important effect on the application of implicit finite-difference schemes to vector processors.
Journal ArticleDOI
Preconditioned methods for solving the incompressible low speed compressible equations
TL;DR: It is sown that the resultant incompressible equations form a symmetric hyperbolic system and so are well posed, and several generalizations to the compressible equations are presented which extend previous results.
Proceedings ArticleDOI
A 3-D Chimera Grid Embedding Technique
TL;DR: A three-dimensional (3-D) chimera grid-embedding technique that simplifies the construction of computational grids about complex geometries by solution of the Euler equations for the transonic flow about a wing/body, wing/ body/tail, and a configuration of three ellipsoidal bodies is described.