2PhD on LBM : 1 PhD on "H2 leakage risk assessment" &1 PhD on "multiphase flows"

2021
Topic : Lattice Boltzmann Lattice-Boltzmann methods

Background, Context :
The industry relies increasingly on numerical simulation for designing, improving, and even validating new combustion devices (engine, burner, furnace, etc.). Today, numerical combustion modelling relies almost exclusively on numerical codes solving the Navier-Stokes equations. 
The Lattice Boltzmann solvers are very different from these codes, intending to solve a discrete variant of the Boltzmann equation. This type of flow solver is progressing rapidly, however, in turbulent flows configurations. The results obtained with Lattice Boltzmann methods (LBM) have shown to be excellent for aerodynamic applications, motivating intensive development of new methods.
Lattice Boltzmann methods applied to industrial applications are recent, however, and few models are able to deal with multiphase flows, and almost none with reactive (combusting) flows. 
The development of combustion modelling within the LBM framework is the topic of this study, following our recent works. 

Research subject, work plan :
Extending the LBM capabilities to combustion requires a profound rethinking of existing methods developed within the Navier-Stokes framework. 
The team has recently made important steps in proving the LBM ability to tackle such flows, at a cost significantly reduced compared to classical results, on relatively simple configurations.

Several positions are available (all on LBM): 

- 1 PhD on H2 leakage risk assessment
- 1 PhD on multiphase flows


Contracts : 3 years for PhD thesis / Salaries depending on experience, according to Aix-Marseille University standards. 

Essential skills : Strong background in scientific computing (c++ preferred), compressible flows, reactive and/or multiphase flows. English.
Desired skills : LBM, HPC, French.

Application : Email CV, cover letter to pierre.boivin@univ-amu.fr.


Intended Start date: In 2021, negotiable depending on profile.

References:
[1] Y. Feng, M. Tayyab, and P. Boivin, “A lattice-boltzmann model for low-mach reactive flows,” Combustion and Flame, vol. 196, pp. 249 – 254, 2018.
[2] Y. Feng, P. Boivin, J. Jacob, and P. Sagaut, “Hybrid recursive regularized thermal lattice boltzmann model for high subsonic compressible flows,” Journal of Computational Physics, vol. 394, pp. 82 – 99, 2019.
[3] S. Zhao, G. Farag, P. Boivin, and P. Sagaut, “Toward fully conservative hybrid lattice boltzmann methods for compressible flows,” Physics of Fluids, vol. 32, no. 12, p. 126118, 2020.
[4] G. Farag, S. Zhao, T. Coratger, P. Boivin, G. Chiavassa, and P. Sagaut, “A pressure-based regularized lattice-boltzmann method for the simulation of compressible flows,” Physics of Fluids, vol. 32, no. 6, p. 066106, 2020.
[5] M. Tayyab, S. Zhao, Y. Feng, and P. Boivin, “Hybrid regularized lattice-boltzmann modelling of premixed and non-premixed combustion processes,” Combustion and Flame, vol. 211, pp. 173–184, 2020.
[6] M. Tayyab, S. Zhao, and P. Boivin, “Lattice-boltzmann modelling of a turbulent bluff-body stabilized flame,” Physics of Fluids, vol. 33, no. 3, p. 031701, 2021.
[7] G. Farag, S. Zhao, G. Chiavassa, and P. Boivin, “Consistency study of lattice-boltzmann schemes macro- scopic limit,” Physics of Fluids, vol. 33, no. 3, p. 031701, 2021.