This project was created by Susan Derrick and Elizabeth Schwartz to showcase Example 18.5-1 from Bird, Stewart and Lighfoot.

Simultaneous Heat and Mass Transfer

Develop expressions for the concentration profile xA(z) and temperature profile T(z) for the system pictured in the image below, given the concentrations and temperatures at both film bouadaries (z = 0, z = delta). Here a hot condensable vapor, A, is diffusing at steady state grhough a stanant film of noncondesable gas, B, to a cold surface at z = 0 where A condenses. Assume that the gas behavior is ideal and that the pressure and the physical properties of the mixture are constant. Neglect radiative heat transfer and thermal diffusion.

figure18.5-1

solution