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Subgrid Reaction-Di...
Subgrid Reaction-Diffusion Closure for Large Eddy Simulations Using the Linear-Eddy Model
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- Arshad, Salman, 1987 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Gonzalez-Juez, Esteban (author)
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Dasgupta, Adhiraj (author)
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- Menon, Suresh (author)
- Georgia Institute of Technology
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- Oevermann, Michael, 1967 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2019-04-30
- 2019
- English.
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In: Flow, Turbulence and Combustion. - : Springer Science and Business Media LLC. - 1573-1987 .- 1386-6184. ; 103:2, s. 389-416
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Abstract
Subject headings
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
- NATURVETENSKAP -- Matematik -- Beräkningsmatematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Computational Mathematics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Keyword
- Turbulent combustion model
- Bluff-body stabilized flame
- Chemical source term closure
- Large eddy simulations
- Linear-eddy model
- Splicing
- Reacting temporal jet
Publication and Content Type
- art (subject category)
- ref (subject category)
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