Subgrid Reaction-Diffusion Closure for Large Eddy Simulations Using the Linear-Eddy Model
| Autor: | Michael Oevermann, Suresh Menon, Adhiraj Dasgupta, Salman Arshad, Esteban D. Gonzalez-Juez |
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| Rok vydání: | 2019 |
| Předmět: |
Premixed flame
Physics Turbulence General Chemical Engineering Direct numerical simulation General Physics and Astronomy 02 engineering and technology Mechanics Solver Combustion 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics 020303 mechanical engineering & transports 0203 mechanical engineering Closure (computer programming) 0103 physical sciences Reaction–diffusion system Range (statistics) Physics::Chemical Physics Physical and Theoretical Chemistry |
| Zdroj: | Flow, Turbulence and Combustion. 103:389-416 |
| ISSN: | 1573-1987 1386-6184 |
| DOI: | 10.1007/s10494-019-00019-x |
| Popis: | Turbulent combustion models approximate the interaction between turbulence, molecular transport and chemical reactions. Among the many available turbulent combustion models, the present focus is the linear-eddy model (LEM) used as a subgrid combustion model for large eddy simulations. In particular this paper introduces a new LEM closure with the reaction-rate approach to close the filtered chemical source terms in the governing equations for species mass fractions and enthalpy. The new approach is tested using a non-premixed syngas flame and a bluff-body stabilized premixed flame problem. Simulation results are compared to data from a direct numerical simulation and experiments. This comparison shows that mean and rms quantities compare well with experiments and are in the range of previous simulation studies. These results are obtained with a pressure-based and unstructured computational-fluid-dynamics solver, an approach that is preferred in industry. |
| Databáze: | OpenAIRE |
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