Eddy Diffusion Coefficients

[LossPEngg]

Hello All,

I am trying to develop a model to predict flame characteristics in pipelines, to model the flame length I have an equation L=d2u/4D. I have been looking for the value of D (eddy diffusion coefficient for a turbulant regime) would any one have any idea about the values of gasses or any place where I can look for the values specifically for Methane?

 

[Estey29]

I am also looking for where I might be able to find this information, any luck with finding where this information can be found? perhaps Perry's