Haut PDF Compressible flow solvers using unstructured grids
Compressible flow solvers using unstructured grids
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A high-order cell-centered finite volume scheme for simulating three dimensional anisotropic diffusion equations on unstructured grids
... with unstructured three- dimensional grids composed of tetrahedral and/or hexahedral ...computed using the finite difference of the ad- jacent ...elliptic flow equation encountered in the ...
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Coupling rigid bodies motion with single phase and two-phase compressible flows on unstructured meshes
... Cartesian grids are considered instead of unstructured ...sophisticated flow models, such as multiphase flow ...of unstructured meshes by Farhat et ...
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1D and 2D solvers coupling for free surface flow modelling
... fine grids have to be used to obtain a suitable representation of the hydrodynamic fields near the points of ...if unstructured meshes or grid refinement allow to decrease the size and the computation time ...
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A conservative coupling algorithm between a compressible flow and a rigid body using an Embedded Boundary method
... fluid flow model is considered, being convenient for treating such short time scale ...employed, using an Eulerian formulation for both the solid and the fluid (for instance, the diffusive interface method ...
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A high-order cell-centered Lagrangian scheme for two-dimensional compressible fluid flows on unstructured meshes
... computed using a nodal solver which can be viewed as a two-dimensional extension of an approximate Riemann ...two-dimensional compressible fluid flows show the robustness and the accuracy of our new ...
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Low-Mach correction for Lagrangian acoustic Riemann solvers on unstructured meshes
... by using unreasonably fine ...scheme using an acoustic Godunov solver on unstructured mesh, and has a negligible cost in term of CPU ...very compressible, the low-Mach correction can have a ...
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Unstructured Meshes for Large Rigid Body Motions Using Mapping Operators
... body motions, while lifting the constraint that mesh nodes remain attached to moving boundaries. The main advantage of this approach is to preserve the mesh connectivity as time evolves, making it well suited for ...
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Deciding Non-Compressible Blocks in Sparse Direct Solvers using Incomplete Factorization
... Project-Team HIEPACS Research Report n ° 9396 — February 2021 — 16 pages Abstract: Low-rank compression techniques are very promising for reducing memory footprint and execution time on a large spectrum of linear ...
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Locally refined discrete velocity grids for stationary rarefied flow simulations
... expensive in transitional regimes, in particular for flows in the range of altitude we are interested in. The efficiency of DSMC can be improved by using coupling strategies (see [12, 14]) or implicit schemes ...
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A Cell-Centered Lagrangian Scheme for Two-Dimensional Compressible Flow Problems
... is an accurate and robust method, which can produce impressive results, even on unstructured polygonal grids, see for instance [21]. An alternative to the staggered discretization is to use a conservative ...
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Global stability of compressible flow about a swept parabolic body
... stability, compressible leading-edge flow, direct numerical simulation, Krylov subspace methods, matrix-free implementation, Cayley transformation R´ esum´ e L’objet de cette th`ese est l’´etude d’un ...
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Contact modeling from images using cut finite element solvers
... In this article, we introduce an alternative approach related to X-FEM [24, 14, 22] and CutFEM [4, 17]. We start from surface triangulations generated by a segmentation tool. This surface mesh, which may be of poor ...
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A 3D cell-centered ADER MOOD Finite Volume method for solving updated Lagrangian hyperelasticity on unstructured grids
... (LAM P 0 -lim) and P 1 → P lim 1 → P 0 (LAM P 1 -lim) for the vertical displacement at the barycenter of the plate (left) and the computed numerical dissipation (88) as a function of time (right). 5.3 Finite deformation ...
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Camera-Projector Matching Using an Unstructured Video Stream
... In this test case, we projected the video on a two-plane wedge located 800mm away from the camera. First, we re- constructed the 3D wedge with a structured-light technique involving gray code and phase shift [ 18 ] on ...
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A high-order finite volume cell-centered scheme for anisotropic diffusion on two-dimensional unstructured grids
... sin θ, where (r, θ) are the polar coordinates corresponding to the Cartesian coordinates (x, y). The corresponding distorted grid obtained setting a0 = 0.25 and n = 8 is plotted in Figure 22(b). Now, we compute the ...
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Parallel unstructured mesh adaptation using iterative remeshing and repartitioning
... 10: Output(mesh groups); /* Return repartitioned groups */ • Non-intrusive linkage with third-party solvers; • Improvable parallel performances by means of dynamic load balancing. Open-source software packages are ...
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A nominally second-order cell-centered Lagrangian scheme for simulating elastic-plastic flows on two-dimensional unstructured grids
... non structur´ es bidimensionnels R´ esum´ e : In this paper, we describe a cell-centered Lagrangian scheme devoted to the numeri- cal simulation of solid dynamics on two-dimensional unstructured grids in ...
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Implementing multifrontal sparse solvers for multicore architectures with Sequential Task Flow runtime systems
... The performance of both parallel 1D and 2D methods depends on the choice of the values for a number of different parameters. For the 1D case these are the block- column nb on which depends the amount of concurrency and ...
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Simulation of compressible viscous flows on a variety pf MPPs : computational algorithms for unstructured dynamic meshes and performance results
... Unite´ de recherche INRIA Lorraine, Technoˆpole de Nancy-Brabois, Campus scientifique, 615 rue de Jardin Botanique, BP 101, 54600 VILLERS LE`S NANCY Unite´ de recherche INRIA Rennes, IRI[r] ...
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