Unipolar diffusion charging of aerosols in the continuum regime

Journal Article · Sat Jan 01 04:00:00 EST 1977 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(77)90377-0· OSTI ID:6725114

Liu, B Y.H.; Pui, D Y.H.

Some recently completed unipolar diffusion charging experiments in the continuum regime are described. Monodisperse aerosols generated by the vibrating orifice generator and the mobility classification method were exposed to unipolar positive ions produced by a corona discharge under conditions approximating pure ionic diffusion, and the resulting particle charge was measured as a function of the charging parameter, N/sub 0/t, where N/sub 0/ is the unipolar ion concentration and t is the charging time. The particle diameter was varied between 0.1 and 5.04 ..mu..m and the N/sub 0/t product, between 2.56 x 10/sup 6/ and 5.1 x 10/sup 7/ (ions/cm/sup 3/)(sec). A comparison of the data with the available theories shows that the best agreement is obtained with the theory of Fuchs and Bricard, whereas the agreement with the theory of White is less satisfactory. It is concluded that for unipolar charging in the continuum regime, the theory of Fuchs and Bricard should be used.

• Research Organization: Univ. of Minnesota, Minneapolis
• OSTI ID: 6725114
• Journal Information: J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 58:1; ISSN JCISA
• Country of Publication: United States
• Language: English

Related Subjects

550500* -- Metabolism
59 BASIC BIOLOGICAL SCIENCES
AEROSOL GENERATORS
AEROSOLS
ATOMIC IONS
CHARGED PARTICLES
COLLOIDS
DIFFUSION
DISPERSIONS
ELECTRICAL PROPERTIES
EQUATIONS
IONS
PARTICLE SIZE
PHYSICAL PROPERTIES
SIZE
SOLS