Proceedings ArticleDOI
Unsteady Euler airfoil solutions using unstructured dynamic meshes
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In this paper, two algorithms for the solution of the time-dependent Euler equations are presented for unsteady aerodynamic analysis of oscillating airfoils for use on an unstructured grid made up of triangles.Abstract:
Two algorithms for the solution of the time-dependent Euler equations are presented for unsteady aerodynamic analysis of oscillating airfoils. Both algorithms were developed for use on an unstructured grid made up of triangles. The first flow solver involves a Runge-Kutta time-stepping scheme with a finite-volume spatial discretization that reduces to central differencing on a rectangular mesh. The second flow solver involves a modified Euler time-integration scheme with an upwind-biased spatial discretization based on the flux-vector splitting of Van Leer. The paper presents descriptions of the Euler solvers and dynamic mesh algorithm along with results which assess the capability.read more
Citations
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Journal ArticleDOI
A three-dimensional torsional spring analogy method for unstructured dynamic meshes
C. Degand,Charbel Farhat +1 more
TL;DR: In this paper, a three-dimensional spring analogy method for updating the position of unstructured dynamic meshes that features torsional springs for controlling the arbitrary motion of the grid points is presented.
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Matching fluid and structure meshes for aeroelastic computations : a parallel approach
Nathan Maman,Charbel Farhat +1 more
TL;DR: The key issues addressed by Matcher are described and the underlying parallel algorithm, which generates the data structures needed for handling arbitrary and non-conforming fluid/structure interfaces in aeroelastic computations, is described.
Journal ArticleDOI
Aeroelastic Dynamic Analysis of a Full F-16 Configuration for Various Flight Conditions
TL;DR: In this article, a three-field methodology for modeling and solving nonlinear fluid-structure interaction problems, and its application to the prediction of the aeroelastic frequencies and damping coefficients of a full F-16 configuration in various subsonic, transonic, and supersonic airstreams is reported.
Proceedings ArticleDOI
Unstructured dynamic mesh for large movement and deformation
TL;DR: A robust method for the dynamic mesh strategy is developed so as to minimize the requirement of the remeshing due to ill-conditioned cells for large movements in three-dimensional moving and deforming body problems.
Journal ArticleDOI
QALE‐FEM for numerical modelling of non‐linear interaction between 3D moored floating bodies and steep waves
Qingwei Ma,Shiqiang Yan +1 more
TL;DR: In this article, the authors further developed the QALE-FEM (Quasi Arbitrary Lagrangian-Eulerian Finite Element Method) based on a fully nonlinear potential theory to numerically simulate nonlinear responses of 3D moored floating bodies to steep waves.
References
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Book ChapterDOI
Flux-vector splitting for the Euler equations
TL;DR: When approximating a hyperbolic system of conservation laws w t + {f(w)} t = 0 with so-called upwind differences, one must determine in which direction each of a variety of signals moves through the computational grid.
Journal ArticleDOI
Comparison of Finite Volume Flux Vector Splittings for the Euler Equations
TL;DR: In this article, a flux-splitting method in generalized coordinates was developed and applied to quasi-one-dim ensional transonic flow in a nozzle and two-dimensional subsonic, transonic, and supersonic flow over airfoils.
Proceedings ArticleDOI
Calculation of in viscid transonic flow over a complete aircraft
Proceedings ArticleDOI
Successes and challenges in computational aerodynamics
TL;DR: The purpose of this paper is to survey some of the highlights of computational fluid dynamics as an emerging branch of aeronautical science, and to identify several remaining unsurmounted challenges.
Journal ArticleDOI
Finite elements in CFD: What lies ahead
TL;DR: The current state of the art of Finite Element Methods in Computational Fluid Dynamics is reviewed and explicit and implicit flow solvers, unstructured multigrid methods, adaptive refinement schemes, grid generation and graphics in 3-D, the effective use of supercomputer hardware and memory are described.
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