Photophoresis of aerosol particles

Formation of charged soot aggregates by combustion and pyrolysis: charge distribution and photophoresis

“…The photophoretic force F agg Ph acting to an aggregate was assumed to be equal to the sum of forces acting on primary particles. The force acting on a primary particle of radius r can be estimated via expression (Chernyak & Beresnev, 1993) …”

Ion-Induced Nucleation of Sulfuric Acid and Water in the Atmosphere: Kinetic Nucleation Modeling With Measured Thermochemistry

“…INTRODUCTION It is well known, that aerosol particles in the unilateral radiation field are influenced by photophoretic forces of a radiometric nature (Preining, 1966). To the present time the radiometric photophoresis of spherical particles in rarefied gas is investigated in details both theoretically, and experimentally (for example, Chernyak &Beresnev, 1993 andKovalev &Suetin, 2003). In particular, the appreciable role of radiometric photophoresis at motion of soot particles at altitudes of upper troposphere-lower stratosphere is predicted (Beresnev et al, 2003).…”

“…For those molecules we admit the possibility of the arbitrary normal and tangential momentum and energy accommodation. To take into account this possibility the reflected molecules distribution function is approximated by an expansion in terms of Hermite polynomials in the velocity half-space (Chernyak & Beresnev, 1993):…”

Analysis of transition and mobility of microparticle photophoresis with slip-flow model

“…Since the object is a micro-or nanoscale particle, the methodology employed for the analysis of rarefied or microscale gas flow is appropriate. In free molecular regime of Kn [ 10, numerous theoretical and experimental studies on microparticle photophoresis have been conducted under the framework of gas kinetic theory (Hidy and Brock 1967;Tong 1973;Lin 1975;Akhtaruzzaman and Lin 1977;Kerker and Cooke 1982;Sitarski and Kerker 1984;Mackowski 1989;Chernyak and Beresnev 1993;Zulehner and Rohatschek 1995;Tehranian et al 2001;Chernyak and Klitenik 2003). In slip-flow regime with 0.01 \ Kn \ 0.1, a few models for evaluation of the photophoretic force and velocity have been developed (Reed 1977;Gukasyan and Yalamov 1984;Mackowski 1989;Keh and Tu 2001).…”