[albert0413]

Hi.

I want to solve the NO production rate applied turbulence pdf mode at the non-premixed combustion model for using user-defined function code.

As you know, NO production rate is determined by temperature and species.
I want to set mixture fraction pdf mode in NOx model - turbulence interaction mode tab, So it is need to input the temperature and species considering fluctuating in udf("Pollut->fluct.temp", "Pollut->fluct.yi[spi]"), not average value(Pollut->temp_m, Molecon(Pollut, spi).
When I check the value of Pollut->fluct.temp and Pollut->fluct.yi[spi], there are lots of value at each cell. The difference between two macros, Pollut-> fluct.temp and Pollut->temp_m is confusing..

What is the meaning of "Pollut->fluct.temp" and "Pollut->fluct.yi[spi]"?