The coagulation rate of suspended particles is studied analytically, taking into account the effects of both the particle size and the size spread. The log normal function was utilized for representing a polydisperse size distribution. The continuum, gas-siip, and free-molecule regimes have been included in the study. As a result of the analysis, a series of comprehensive expressions are provided with which the particle coagulation rates in various NOMENCLATURE A, B, C, constants (= 1.246, 0.42, and 0.87, respectively) b constant defined byTable 2 K collision coefficient for the continuum regime [cc/particles/sec] K collision coefficient for the freemolecule regime [~c / c m ' /~ sec/particles] k Boltzmann constant [gcm2/ sec2/ K] K ?I Knudsen number

No abstract