Lawrence Berkeley National Laboratory
Displacement speeds in turbulent premixed flame simulations
- Author(s): Day, Marcus S.
- Shepherd, Ian G.
- Bell, J.
- Grcar, Joseph F.
- Lijewski, Michael J.
- et al.
The theory of turbulent premixed flames is based on a characterization of the flame as a discontinuous surface propagating through the fluid. The displacement speed, defined as the local speed of the flame front normal to itself, relative to the unburned fluid, provides one characterization of the burning velocity. In this paper, we introduce a geometric approach to computing displacement speed and discuss the efficacy of the displacement speed for characterizing a turbulent flame.