MIXED CONVECTIVE FLOW WITH MASS-TRANSFER IN A HORIZONTAL RECTANGULAR DUCT HEATED FROM BELOW SIMULATED BY THE CONDITIONAL FOURIER SPECTRAL-ANALYSIS

With application to a horizontal chemical vapor deposition apparatus i n mind, mixed convection and mass transfer in a horizontal rectangular duct heated from below are numerically investigated. The computer sim ulation is carried out based on the conditional Fourier spectral metho d recently developed by the authors. Unsteady flow states occurring at rather high Grashof numbers are highlighted as good conditions for pr oviding the spanwise uniformities of time-averaged temperature distrib ution and time-averaged Sherwood number distribution on the substrate at the duct bottom.