Two Bulb Diffusion Cell A Test of the Effective Diffusivity

Example 6.4.1 Diffusion in a Two Bulb Diffusion Cell A Test of the Effective Diffusivity 

Let us now proceed to see if the Wilke effective diffusivity method is able to model the diffusional process in the two bulb diffusion cell experiment of Duncan and Toor (1962). For convenience, we repeat the following information from Example 5.4.1. The two bulbs in the apparatus built by Duncan and Toor had volumes of 77.99 and 78.63 cm3, respectively. The capillary tube joining them was 85.9 mm long and 2.08 mm in diameter. The entire device 

SOLUTION The concentration time history can be determined directly from Eq. 6.4.3. We illustrate the procedure by calculating the mole fractions after 4 h (14,400 s). 

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