Su, Xianli;
Lin, Chuandong;
Luo, Kai Hong;
(2025)
Central-Moment Discrete Boltzmann Method for Reactive Flows.
Communications in Computational Physics
, 38
(2)
pp. 521-537.
10.4208/cicp.OA-2024-0297.
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Abstract
A central-moment discrete Boltzmann method (CDBM) is proposed for reactive flows, accommodating adjustable specific heat ratios and Prandtl numbers. In the framework of CDBM, a unified set of kinetic equations is used to delineate both macroscopic quantities and higher-order central moments. Via these central moments, the nonequilibrium effects that are directly related to the thermal fluctuation beyond conventional hydrodynamic governing equations can be quantified. Moreover, the discrete Boltzmann equation of the CDBM is simpler than that of previous multiplerelaxation-time DBMs, owing to the elimination of the additional term in the DBM. Furthermore, this method is capable of modeling supersonic compressible reactive flows characterized by high Mach numbers. The model is verified through simulations encompassing sound waves, shock waves, thermal Couette flows, regular shock reflections, and supersonic reactive waves.
| Type: | Article |
|---|---|
| Title: | Central-Moment Discrete Boltzmann Method for Reactive Flows |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.4208/cicp.OA-2024-0297 |
| Publisher version: | https://doi.org/10.4208/cicp.OA-2024-0297 |
| Language: | English |
| Additional information: | This version is the author-accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Reactive flows, nonequilibrium effects, central-moment discrete Boltzmann method |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10213536 |
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