[sanjeetlimbu]

I am using the partially premixed combustion - ignition delay model, I have uploaded the chemkin file already for species 43. the fuel and oxidser composition is defined and I generated the PDF for the species mixture.
To check the Rapid compression model- that is the compression stroke for engine, I need the fuel and mixture to compress as simulated in experiment

I am not able to define fuel for the control volume in boundary condition, as I will not do inlet that make fuel enters volume. But at start point the volume must contain the fuel mixture, as it closed system.
The Fuel mixture area shown in figure will be , a cellzone - which i defines as fluid which has material name = pdf mixture

I will be great help