Aerosol Technology: Properties, Behavior, and Measurement of by William C. Hinds

By William C. Hinds

New version of the textual content introducing the fundamentals of the sector, together with glossy thought and purposes. Chapters disguise such subject matters as houses of gases, bioaerosols, uniform particle movement, Brownian movement and diffusion, respiration deposition types, and sampling and size of focus. applicable for execs, graduate scholars, and complex undergraduates. makes use of twin devices, with SI devices fundamental and cgs devices secondary.

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Extra info for Aerosol Technology: Properties, Behavior, and Measurement of Airborne Particles

Sample text

D, are the midpoints, or someother characteristicdiameterfor intervals 1 through I. P S! P JO S;}Idd~ Jo ~;})[S~q ~ ;}A~q nOA J! PU! p;}Jns~;}w AI~u;}nb;}lJ S! u~;}w ;}q~ S! tJodoJd S! qM 'SS~W JO 'lP U! tJodoJd S! tJodoJd O~ P;};}U JO ;}JnS~;}W AI~U;}nb;}JJ ;}M ~~q~ S! Idd~ ou S! ;}J;}ql '~;}J~ ;}:)~Jlns S! ~:);}S U! nb~ ~q~ WOJ~ "8 1"0 s! q~put! 6L"0 S! Jg ~q~ WOJ~ "6"v "ba put! xOJd -dt! S! :>osst! wti6 S! lnwn:> t! L ~sn oslt! S! 110-;= d!!. w ;)SO . LJo Z put! 1 suwnI°:> put! g ;)q~ 10J wrl ~ I put!

U 't ~ ~ 20 10 81 6 2. -. 1 2 I I I I . I I I I 10 30 50 70 90 Percentlessthan indicatedsize I. 14 Cumulative count and cumulative mass distributions on log-probability graph. representa bimodal distribution by two overlapping lognormal distributions. ) One great advantageof the lognormal distribution is that, for a given distribution, the geometricstandarddeviationremainsconstantfor all momentdistributions. If the GSD is the same,the ratio dS4%/dso% will be the same,for eachdistribution, and the cumulative distribution lines for other momentdistributions will be parallel to the cumulative count distribution line on a log-probability graph.

In this book we consideronly the more common variety, the "less than indicatedsize" cumulative distribution. ~ S! JlBd JO l;}qwnu S! L "';}~Bl;}AB,, Ull;}~ IBl;}U;}~ ;}q~ U! p;}pnI:>U! ~:>;}S~u;}nb;}sqns U! ~:>;}U -UO:> U! p -U;}P! q~ ~uy~p ~Bq~ p~~BIn:>IB:> ~lB Sl~~~UlBmd pUB p~wnSSB S! :>u~nb~JJ ~q~ Jo ~nluA ~q~ o~ Iunb~ S! ~ulnwn:> ~q~Jo ~doIs ~ql. ~tlW -JOjU! , the total numberof particles,and the summationsare over all intervals. The midpoint size dj can be the geometricmidpoint-the squareroot of the product of the upper and lower limits of the interval-or the arithmetic midpoint-the mean of the limits.

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