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rochre26
11-30-2011, 04:50 AM
from the help files -

Sets the amount of density required to completely burn a set volume of fuel. For example, to burn a volume of gasoline requires 15 times more air than fuel. To simulate a gasoline fire, set Air/Fuel Ratio to 15.

Does this mean that one needs to output 15 times as much denstiy as fuel?

Thanks.
Duncan
12-01-2011, 12:20 AM
No, the fuel grid value is interpreted as "the ratio of fuel to air in a voxel". Thus if you initialized the fuel on the grid to 1.0 then it is a mix with no air... pure fuel. You could emit values of one using the replace fuel method on the emitter with a very high rate setting and fuel emission at 1.0. (or just paint values of 1 into the fuel grid. It would then only burn along the outer boundary of the fuel where it mixes with the air. You don't even need a density grid to do a fuel simulation, but it can be useful for the smoke created by the burning. The temperature grid, while not required, is pretty important for a realistic simulation, however.
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