Initiation of reaction in the vicinity of a single particle heated by microwave radiation

Droplet Spreading Process Impact on Ignition Characteristics of Condensed Materials

“…The bed depth of condensed materials was selected in such a way that its initial temperature was preserved on the nonheating surface until the ignition moment. It is determined [1,2] that when the condensed materials are ignited by the single particle heated to high temperatures, the condensed material ignition conditions are first reached on the particle symmetry axis (in axisymmetric problem solving) at the "particle -condensed material" interface point. Hence, the ignition delay times t з obtained in one-dimensional problem solving, at a first approximation can be considered as t з proper values for particles (or droplets) of large diameter (more than 100 μm).…”

“…The stated boundary value problem is solved in a similar way [1,2] by the finite difference method using an algorithm developed to solve non-linear problems of the heat transfer with movable boundaries of the simulation domain [7] and in-situ heat release sources [8]. An unequally-spaced and irregular grid [6] was used.…”

“…The problems of solid [1,2] and liquid [3,4] fuels are solved. However, the results [1][2][3][4] are obtained for conditions when the solid particles had an effect on condensed materials. In the real world, there are some types of liquid-alloy droplet impact on condensed materials.…”