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dc.contributor.author
Jeltsch, Rolf
dc.date.accessioned
2017-06-09T18:45:34Z
dc.date.available
2017-06-09T18:45:34Z
dc.date.issued
2011
dc.identifier.uri
http://hdl.handle.net/20.500.11850/45198
dc.description.abstract
A high-order Semi-Lagrangian numerical method is developed for the simulation of a subsonic methane/air flame. The fluid is described by the Navier-Stokes equations for a mixture of ideal gases. Turbulence is modeled using Large-Eddy simulation (LES) together with a transport equation for the subgrid kinetic energy. For the chemical reactions we use an unsteady flamelet model based on transport equations for the mixture fraction and a reaction progress variable. This allows for extinctions and re-ignitions by not assuming fast chemistry nor steady flamelets. To solve the resulting system of coupled transport equations a Semi-Lagrangian (FSL) method, known from climate modeling, is used. For the interpolations from the Lagrangian mesh points to a fix mesh an interpolation based on piece-wise polynomials of degree 2m which are m-times differentiable are used. This interpolation is easy to implement, computations are fast. It is conservative and creates low or zero numerical diffusion and dispersion. Finally the FSL method is used to simulate Sandia flame D. For the 3-d simulations a mesh in cylindrical coordinates is used where singular derivatives and high frequencies at the polar axis are controlled.
dc.language.iso
en
dc.publisher
The Hong Kong University of Science and Technology, Department of Mathematics
dc.title
High-order Semi-Lagrangian Numerical Method for the Large-Eddy Simulation of Reactive Flows
dc.type
Presentation
ethz.event
Kolloquium
ethz.event.location
Hong Kong, China
ethz.event.date
October 31, 2011
ethz.notes
Talk.
ethz.publication.place
Hong Kong
ethz.publication.status
unpublished
ethz.leitzahl
03289 - Jeltsch, Rolf
ethz.leitzahl.certified
03289 - Jeltsch, Rolf
ethz.date.deposited
2017-06-09T18:45:43Z
ethz.source
ECIT
ethz.identifier.importid
imp59364ee6b973690455
ethz.ecitpid
pub:74290
ethz.eth
yes
ethz.availability
Metadata only
ethz.rosetta.installDate
2017-07-13T06:50:37Z
ethz.rosetta.lastUpdated
2017-07-13T06:50:37Z
ethz.rosetta.versionExported
true
ethz.COinS
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