In this section, numerical methods using the finite element package Fastflo for solving the basic equations of vapour transport (ch. 2) are
presented, including transpiration, the transport of enthalpy by
interdiffusion, and buoyancy forces due to temperature and vapour mass fraction
differences.
The penalty method fails for this problem, so an alternative algorithm is
described.
A simple modification of the automatic square mesh generator provided with
Fastflo, unit.c, creates a mesh of smoothly varying fineness.
The results of a single simulation are presented in some detail
to illustrate the variety of postprocessing procedures possible
with Fastflo (§5.2.2).