Quotient free exhalation rate

One, or actually two questions must be raised in connection with the exhalation behaviour exemplified in Figure 2. For how long will the exhalation decrease and what is the final steady-state exhalation value The latter question is the easier one, as the quotient free exhalation rate, Eq, to final steady-state exhalation with the can closed, E, is (cf. Figure 2 for the notation) ... 

Table I. The 95% gradient reshaping times (see text) for different combinations of sample thickness, d, outer volume height, h, and diffusion length, L. The quotient free exhalation rate, Eq, and the final steady-state exhalation rate, E, is also given.

For a thin sample (d<0.5L), like that in Figure 2, the quotient is equal to (1+a)/ a where a equals h/(pd), the outer to inner volume ratio. Applying Equation 2 to our case in Figure 2 the steady-state exhalation rate is simply half of the free exhalation rate. 

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See also in sourсe #XX -- [ ]

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