| 1. | No title |
| | Approximation Space · Sub divide domain into non-overlapping grid cells Q · Polynomial trial function with degree p for each grid cell Q... U h, Q (x, t) = jM ^ UjQ (t) Q (x), j · Mo dal basis { Q } j =1 ,..., M is orthogonal j ^ · Polynomial co efficients UjQ (t) are the time dep endent degrees of freedom · Approximation space is p olynomial (inside a grid cell) but discontinuous across grid cell interfaces... |
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| 2. | 2011 ONERA NAT Froehlich v2x |
| | Adaption + retains grid topology ok for any curvilinear solver / external add on no impact on load balancing - requires sound method for moving the grid - can lead to distorted cells... Introduction Moving Mesh method Criteria for adaption Results MMPDE for cell centers... Arbitrary Lagrangean Eulerian uG, j dV = 0 = grid velocity = volume of cell d dt... |
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| 3. | Segrex |
| | Compressible fluids · Immiscible fluids · Surface tension · The interface is passively advected with the local fluid velocity Guideline : simplicity will provide computational power through scalability · Cartesian grid · No interface reconstruction process : interface capture method · Explicit time discretization · Finite volume method for hyperbolic systems : need to compute o fluxes on the cell boundaries o source terms locally in every cell · Directional splitting... |
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| 4. | Présentation PowerPoint |
| | Demonstration on the fluxes computation conservative variables belongs to cells fluxes are computed on the interfaces... Face variables are coalesced by construction Cell variables are not coalesced Need a reorganization before computing the fluxes Organize data following the order within the different stencils : duplication... |
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| 5. | OneraXtremCFD |
| | The © 2010 - IFP Energies nouvelles use one row of ghost cells in order to communicate the boundary data between processors... LLnnear i i ea r Speed up 500 000 Cells SSpeedup 1500 000 Cells peed up 000 000 Cells... 1 955 cells... 3 910 cells... 7 820 cells... 1 955 cells... 3 910 cells... 512 speed-up up to 8092 processors Optimal minimum cell number = 4.000 cells... |
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| 6. | Internal Noise Prediction in Fixed-Wing Aircraft Fuselages - ONERA / DADS-EN |
| | In collaboration with Airbus of France and Dassault-Aviation, measurements of internal noise in the MF and HF ranges were carried out on a naked cell of a Falcon plane and on the fuselage of an ATR - 42 aircraft.... Low and mid-frequency response simulations were performed by the finite element method for the Falcon cell, and high-frequency response simulations were performed by the SEA method for the Falcon cell and the ATR - 42 fuselage.... |
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| 7. | Hypersonic studies in the ATD 5 test cell - ONERA / DEFA-EN |
| | Hypersonic studies in the ATD 5 test cell - ONERA / DEFA-ENWho are we ?Fundamental and Applied Energetics... Hypersonic studies in the ATD 5 test cell. ATD 5 test cell with the JAPHAR dual mode ramjet engine. Full size :. Test set up... The ATD 5 test cell, located on the Onera Palaiseau site, near Paris, is especially dedicated to study physical and chemical phenomena linked to supersonic combustion and also to evaluate combustion chamber performances or injection system behaviour.. |
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| 8. | NAUTILUS - ONERA ' s Technical Resources for the Simulation of Spatial Environment - ONERA / DESP-EN |
| | Irradiation cell with Cf252 and Am241 sources... |
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| 9. | Connector : grid connectivity module - ONERA / DSNA-EN |
| | Overset grid connectivity can be computed in a few separated steps : the search for blanked cells (cells that lie into a given surface) [ Fig ], the overlap optimization step (maximize the blanking to get a minimum overlap between grids) [ Fig ] and the computation of interpolation coefficients..... |
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| 10. | Office National d'Études et de Recherches Aérospatiales |
| | View of the mesh after blanking and overlap optimization (blanked cells not visualized)... View of the mesh after blanking and overlap optimization (blanked cells not visualized)... View of the mesh after blanking and overlap optimization (blanked cells not visualized)... Each base defines a Chimera component Output : the pytree, for which each blanked zone contains the CGNS OversetHoles node, providing the indices of blanked cells... |
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