Improvement of the pressure algorithm of the stand-alone PDF method to treat unsteady three-dimensional turbulent reacting flows
| Autor: | P. Roth, D. Maly, R. Vilsmeier |
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| Rok vydání: | 2009 |
| Předmět: |
Normalization (statistics)
Turbulence General Chemical Engineering General Physics and Astronomy Energy Engineering and Power Technology Probability density function General Chemistry Fuel Technology Flow (mathematics) Joint probability distribution Modeling and Simulation Particle Boundary value problem Convection–diffusion equation Algorithm Mathematics |
| Zdroj: | Combustion Theory and Modelling. 13:853-883 |
| ISSN: | 1741-3559 1364-7830 |
| DOI: | 10.1080/13647830903207480 |
| Popis: | This paper deals with the particle-mesh probability density function (PDF) method. It shows how an existing but less precise pressure algorithm for the stand-alone method can be improved. The present algorithm is able to handle the general case of an unsteady three-dimensional turbulent reacting flow. The transport equation of the joint PDF of velocity and composition is solved with a particle method. Open boundary conditions are realized and for statistical reasons a simple but effective particle splitting procedure is applied. Based on a simple configuration, the properties of the presented improved pressure algorithm are analysed. It is shown which numerical condition must be taken care of so that the algorithm is able to correct the particle positions such that the normalization condition is fulfilled as accurately as specified. To verify the algorithm the combustion of a methane–air mixture enclosed in an open simulation volume is calculated. It is shown that the simple particle splitting algorithm w... |
| Databáze: | OpenAIRE |
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