Penndorf extension

A. Selamet and V. S. Arpaci, Rayleigh Limit-Penndorf Extension, International Journal of Heat and Mass Transfer, 32, pp. 1809-1820,1989. 

FIGURE 9.13 (a) Variation of the spectral scattering efficiency with respect to wavelength for a glass spherical particle of diameter 0.2 mm. When appropriate, the Rayleigh, Mie, and geometrical treatments are shown. Also shown is the Penndorf extension (b) same as (a), except for the variation of the spectral absorption efficiency. 

Selamet and Arpaci [186,187] have investigated the accuracy of the Rayleigh approximation for soot particles and proposed a simple extension based on the Penndorf approximation. According to their study, for larger particles, the extinction efficiency should be modified to ... 

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See also in sourсe #XX -- [ , ]

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