By M Rahman, C. A. Brebbia, M. Rahman
This ebook includes the papers awarded on the 8th foreign convention on Advances in Fluid Mechanics held September 15-17, 2010, in Algarve, Portugal. This biennial convention is the newest in a winning sequence that all started in 1996. The convention presents a platform for engineering pros to percentage advances and new purposes within the zone of fluid mechanics.
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Extra resources for Advances in Fluid Mechanics VIII (Wit Transactions on Engineering Sciences)
Turbulence modeling with Large Eddy Simulation (LES) has been matured enough for industrial problems. In LES eddies up to the filter width are resolved on the grid scales, but the fine structures where combustion takes place are still not resolved, which calls for combustion modeling in LES. Combustion closure in LES is achieved through a Turbulence Chemistry Interaction Model (TCIM). Most of the developed TCIM are based on the already existing RANS model. In the present study, a TCIM based on the Eddy Dissipation Concept (EDC) is proposed for large eddy simulation.
All these quantities are in satisfactory agreement with experiments. Keywords: LES, EDC, Flame H3, FLOWSI. 1 Introduction Turbulence Chemistry Interaction Model (TCIM) is an approach where a combustion model for reaction rates is developed considering the major aspects of turbulence. In laminar flows a direct closure of the reaction rate is achieved by the Arrhenius reaction rate equation, but in turbulent flows having fluctuations, the direct closure leads to a difficulty due to non-linearity of the Arrhenius term.
The mean and RMS radial profiles of the calculated temperature and velocities at R/D = 20 and R/D = 40 are shown in fig. 3. com, ISSN 1743-3533 (on-line) 36 Advances in Fluid Mechanics VIII compared with experiments and flamelet solutions and the comparison seems to be satisfactory. 5 which affected the overall spread. A similar behavior is also observed with the flamelet approach. It can be concluded that this behavior is not because of the combustion model used but because of the inflow boundary condition and modeling of the nozzle.
Advances in Fluid Mechanics VIII (Wit Transactions on Engineering Sciences) by M Rahman, C. A. Brebbia, M. Rahman