Results from three different opposed flow situations are described, namely: (i) particle trajectories in isothermal, infinitely wide, infinitely spaced opposed jets, (ii) those in nonisothermal, infinitely wide, infinitely spaced impinging jets, and finally (iii) those in nonisothermal, infinitely wide, but finitely spaced impinging jets. The latter configuration is experimentally realized in the experimental portion of this project. In the simplified analytical isothermal situation, three distinct types of particle trajectories are possible. The relationship between particle density, particle diameter, gas viscosity, and the stretching rate of the flow fields determines whether the particle motion is underdamped, overdamped, or particles of the hypothetical nonisothermal situation. A computer program simulating particle behavior in the experimental configuration permits extrapolation of particle trajectories and subsequently particle time-temperature histories, given experimental gas species and temperature profiles. (ERA citation 10:000031)
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