Conformal mapping of a solution to a mixed boundary problem for soil gas flow

The principal soil gases of current concern to building are radon and landf ill gas. The how of these is generally considered to be dominated by viscou s flow driven by pressure differences. This paper presents results for the pressure-driven flow of gas for problems relating to a building with a bare soil floor, for example below a suspended timber floor. This paper builds on a previous paper by mapping the solution to a mixed boundary problem ont o another geometry. In a third paper these results will be compared with an analytical result from elsewhere and an experiment. (C) 1999 Elsevier Scie nce Ltd. All rights reserved.