A study of the methods and caveats in making burn time measurements in heterogeneous shock tubes is presented. Some of the most important but often neglected effects including convective effects, size distribution effects, and wall/boundary layer effects are discussed, with the wall effects being the strongest case for the use of low mass fraction loading as opposed to plate loading or uniform seeding to insert the condensed phase into the shock tube. Recent results using the UIUC Heterogeneous Shock Tube Facility will be presented in the discussion of the bias that may be introduced without the careful consideration of these factors.
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