on the definition of Start in shell autoignition
I found this in starcd users guide:
Start, End ā" Ignition starting and ļ¬nishing time or time step no., depending on the When? menu setting. Use a realistic value, e.g. the start of ignition, for the Start time but set the Finish time to a large number, so that ignition cut-off may be controlled solely by the limiting values speciļ¬ed above.
I can quite understand the realistic value of start of ingnition for spark ignition. But how do we define the ignition start of a compression ignition case then?
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