Proceedings ArticleDOI
Recent enhancements to OVERFLOW
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
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Proceedings ArticleDOI
Drag Prediction for the DLR-F4 Wing/Body using OVERFLOW and CFL3D on an Overset Mesh
TL;DR: A review of numerical drag prediction in an aircraft design environment can be found in this paper, where the authors provide a road-map which illustrates some of the actions taken in the past seven years in pursuit of accurate drag prediction.
Proceedings ArticleDOI
Generation of Aerodynamic Data using a Design of Experiment and Data Fusion Approach
TL;DR: In this article, a new approach utilizing Design of Experiment (DOE) and data fusion is proposed to improve the efficiency of the data generation process by merging various fidelity solutions into a single coherent database.
Computational Aerodynamic Modeling of Small Quadcopter Vehicles
TL;DR: In this article, high-fidelity computational simulations have been performed which focus on rotor-fuselage and rotor-rotor aerodynamic interactions of small quad-rotors vehicle systems, and the three-dimensional unsteady Navier-Stokes equations are solved on overset grids using high-order accurate schemes, dual-time stepping, low Mach number preconditioning, and hybrid turbulence modeling.
Proceedings ArticleDOI
Automatic hybrid-cartesian grid generation for high-reynolds number flows around complex geometries
TL;DR: An automatic and robust approach to generate meshes for viscous ow simulations based on the generation of a hybrid-Cartesian grid, which can be fully automated and demonstrate the feasibility of the approach.
References
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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.