I have some doubts regarding the mixture species definition. The user guide says, that the last species in the mixture
(Setup->Materials->Mixture) should be the bulk species. But when I introduce mainly oxygen at the inlet and coal with some small amount of an inert gas (Ar) to transport coal, then after the combustion reaction (C+O2->CO2) I obtain mostly carbon dioxide. So the question is, which element should be my bulk species? (Whereas in air gasification, nitrogen is the most abundant species) in oxygen case at first oxygen is the most abundant element, then it is CO2. So the idea of the bulk species refers to which phase of the process?
Food for thought for me
Thank you in advance!