A Different Physical Interpretation of Flame Sheet Surface Density

ABSTRACT

A kinematic equation of motion for an iso-surface describing premixed turbulent combustion in the flamelet regime is used to construct a conceptually transient normalised scalar field defined at each point as the shortest distance to the flame sheet The probability density function of this normalised scalar field is related to the surface density of the flame. Closure of the mean reaction rate term depends on the surface density of the flame sheet, and hence, determination or the probability density function of the normalised scalar field closes the mean reaction rate term.

Key Words:

• Surface density
• G-equation