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NEWS

Organization of a validation workshop of CFD codes for hydrogen air flames

In the framework of CLEAN AVIATION (), a workshop of comparison of there-dimensional CFD codes able to compute hydrogen – air…


IMFT and CERFACS  obtain a third ERC advanced grant on H2 combustion together: SELECT-H

Pr Thierry SCHULLER (Institut de Mécanique des Fluides de Toulouse, UPS) has obtained a new advanced grant from the European Research…


Sparse Days Meeting 2023

Sparse Days Meeting 2023  🗓️ 19-20 June 2023  @ Cerfacs, France 🌐

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CALENDAR

Monday

05

June

2023

High-fidelity simulations of Turbomachinery flows

From Monday 5 June 2023 to Wednesday 7 June 2023

  Training    

Cerfacs is Qualiopi certified for its training activities Duration : 3 days / 21 hours Satisfaction index In May 2022, 100% of participants were satisfied or very satisfied (results collected from 7 respondents out of 9 participants, a response rate of 78%) Abstract This training course aims at providing advanced training and formation in the […]

Wednesday

07

June

2023

H. D. R. Defense : Guillaume DAVILLER : “

Wednesday 7 June 2023 at 14h00

  HDR Defense       CONFERENCE ROOM – CERFACS – TOULOUSE     Organized by Nathalie BROUSSET    

” Computational Fluid Dynamics Applied to Aeroacoustics: From Numerical Methods to Flow Physics Analysis  “ Youtube Link : soon ABSTRACT : The main thread of this research project is the computational fluid dynamics (CFD), dedicated to the aeroacoustics applied to aeronautics and aerospace fields. The final objective of this program is to improve our knowledge […]

Monday

12

June

2023

Data assimilation

From Monday 12 June 2023 to Thursday 15 June 2023

  Training    

Cerfacs is Qualiopi certified for its training activities Duration : 4 days / 28 hours Satisfaction index   In June 2022, 100% of participants were satisfied or very satisfied (results collected from 6 respondents out of 6 participants, a response rate of 100%) Abstract Data assimilation is an important component of modelling in a number […]

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PUBLICATIONS

Schwarzmeier, C. and Ruede, U. (2023) Analysis and comparison of boundary condition variants in the free-surface lattice Boltzmann method, International Journal for Numerical Methods in Fluids, 95 (5), pp. 820-850, doi:10.1002/fld.5173

[doi]

@ARTICLE{AR-PA-23-53, author = {Schwarzmeier, C. and Ruede, U. }, title = {Analysis and comparison of boundary condition variants in the free-surface lattice Boltzmann method}, year = {2023}, number = {5}, volume = {95}, pages = {820-850}, doi = {10.1002/fld.5173}, journal = {International Journal for Numerical Methods in Fluids}}

Sekularac, N., Fang, X., Bushe, K. and Davy, M. H. (2023) Conditional space evaluation of progress variable definitions for Cambridge/Sandia swirl flames, Combustion Theory and Modelling, pp. 1-32, doi:10.1080/13647830.2023.2211537

[pdf] [doi]

@ARTICLE{AR-CFD-23-56, author = {Sekularac, N. and Fang, X. and Bushe, K. and Davy, M.H. }, title = {Conditional space evaluation of progress variable definitions for Cambridge/Sandia swirl flames}, year = {2023}, pages = {1-32}, doi = {10.1080/13647830.2023.2211537}, journal = {Combustion Theory and Modelling}, abstract = {Data from all spatial locations of nine turbulent flames in the Cambridge/Sandia swirl database are combined to study how the choice of scalar variables in conditional moment closure (CMC) type approaches affect the conditional spatial fluctuations of reactive scalars. In order to investigate the influence of swirl and stratification, two additional data-sets have been constructed. Principal component analysis (PCA) is applied to help identify the number of scalar variables and the most appropriate choices to describe the composition space. Two PCA scaling methods have been adopted, namely Pareto and Auto-scaling. Regardless of the data-set investigated and the scaling method used, the results suggest that a single principal component correlated with temperature accounted for the largest variance. For the first moment hypothesis, four progress variable, c, definitions identified by PCA are selected as conditioning variables to investigate the conditional fluctuations and normalised RMS of various species and temperature from all three databases at all axial locations. The results indicate that two control variables based on mixture fraction, Z, and progress variable significantly reduce the conditional fluctuations of scalars compared to a single variable. The selection of progress variables had minimal effects on the RMS of conditional fluctuations for all tested conditions, although a slight reduction of conditional fluctuations was found for the temperature-based progress variable, which can potentially help the further extension of CMC-based models in different flame configurations. The present study also shows that using Z and c (regardless of its definition) as two conditioning scalars enables the detachment of the thermo-chemical state from space, swirl and stratification effects. This suggests that adopting a doubly conditioned source term estimation (DCSE) approach might successfully predict the considered set of flames, assuming that ensembles are divided along the axial direction.}, pdf = {https://cerfacs.fr/wp-content/uploads/2023/05/Sekularac_Comb_Theory_Model_AR_CFD_23_56.pdf}}

Schuster, D., Climent, E. and Ruede, U. (2023) Particle laden flows around a circular cylinder from the hydrodynamic to granular regime, International Journal of Multiphase Flow, 165, pp. Article number 104487, doi:10.1016/j.ijmultiphaseflow.2023.104487

[doi]

@ARTICLE{AR-PA-23-50, author = {Schuster, D. and Climent, E. and Ruede, U. }, title = {Particle laden flows around a circular cylinder from the hydrodynamic to granular regime}, year = {2023}, volume = {165}, pages = {Article number 104487}, doi = {10.1016/j.ijmultiphaseflow.2023.104487}, journal = {International Journal of Multiphase Flow}}

Aniello, A., Laera, D., Marragou, S., Poinsot, T., Schuller, T. and Selle, L. (2023) Influence of pilot H2 injection on methane-air swirled flame stabilization and acoustic response, Combustion and Flame, 253, pp. Article number 112749, doi:10.1016/j.combustflame.2023.112749

[doi]

@ARTICLE{AR-CFD-23-51, author = {Aniello, A. and Laera, D. and Marragou, S. and Poinsot, T. and Schuller, T. and Selle, L. }, title = {Influence of pilot H2 injection on methane-air swirled flame stabilization and acoustic response}, year = {2023}, volume = {253}, pages = {Article number 112749}, doi = {10.1016/j.combustflame.2023.112749}, journal = {Combustion and Flame}}

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