A wall-function boundary condition is developed for the pdf/Monte Carl
o method. Like traditional wall functions, this reproduces the logarit
hmic velocity profile and shear stress in equilibrium flow conditions.
A constant-stress analysis for the pdf, and a linear-stress analysis
for the first two moments of the pdf are developed as the basis for th
is wall-function approach. Stable and accurate boundary conditions are
derived and demonstrated with fully-developed channel flow. (C) 1997
American Institute of Physics.