Numerical Simulation of Premixed Combustion Combining Level Set with Extended Finite Element Methods

نویسندگان

  • FLORIAN HENKE
  • VOLKER GRAVEMEIER
  • Florian Henke
  • Volker Gravemeier
چکیده

TheG-function approach to premixed combustion problems is based on the flamelet concept. Thereby, the flame front is modeled as an embedded interface within the bulk. A level set function is used to describe the position of the flame front. To account for discontinuities in the velocity and the pressure fields across the interface, an eXtended Finite Element Method (XFEM) is applied. That is, the flow field, governed by the incompressible Navier Stokes equations, interacts with the G-equation in a coupled problem.

منابع مشابه

Extended Variational Multiscale Methods for Turbulent Variable-density Flow at Low Mach Number and Premixed Combustion

Problems of combustion are usually mathematically described by a variabledensity formulation of the Navier-Stokes equations at low Mach number. Finite volume and finite difference methods have been proposed for large-eddy simulation (LES) of variable-density turbulent flows at low Mach number. Finite element methods, which are often better suited for problems in complex geometries, have so far ...

متن کامل

Simulation of Premixed Combustion Flow around Circular Cylinder using Hybrid Random Vortex

This research describes the unsteady two-dimensional reacting flows around a circular cylinder. The numerical solution combines the random vortex method for incompressible two-dimensional viscous fluid flow with a Simple Line Interface Calculation (SLIC) algorithm for the propagation of flame interface. To simplify the governing equations, two fundamental assumptions namely Low Mach Number and ...

متن کامل

Large-Eddy Simulation of Turbulent Combustion

In recent years, Large Eddy Simulation (LES) has been successfully applied to non-premixed and premixed turbulent combustion problems [1, 2, 3]. In most technical combustion applications, the pure non-premixed or premixed combustion models are no longer valid, since partially premixed combustion has to be taken into account. An example is the stabilization region of a lifted non-premixed flame....

متن کامل

On the Use of a Dynamically Adaptive Wavelet Collocation Algorithm in Direct Numerical Simulations of Non-Premixed Turbulent Combustion

The ability to model non-premixed combustion is very important; many practical combustion devices operate with non-premixed flames in the presence of turbulent flows (Vervisch & Poinsot, 1998). Non-premixed turbulent flames are characterized by a large spectrum of temporal and length scales. Additional complexity is added by the large number of unknowns and by the stiffness of highly nonlinear ...

متن کامل

A Dynamic Model for the Turbulent Burning Velocity for Premixed Combustion LES

A somewhat limited number of computationally tractable methods of simulating turbulent premixed combustion currently exist. Most of these methods either directly or indirectly require information about how fast flames propagate in turbulent flow fields. In this work a dynamic model for describing turbulent burning velocities in the context of large eddy simulation (LES) is presented. This model...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

متن کامل
عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2009