EDC Combustion model small scale mass fraction
 

Hi,
I have a question about the eddy dissipation concept. The reaction rate of a specie i in fluent is defined by
https://us.v-cdn.net/6032193/uploads...X6O/grafik.png

Where ( )* denotes the small scale part. In the manual it is not documented how Y* is calculated and I'm not able to derive the Ansys formula from the original paper.