PREDICTION OF DUCT FLOWS WITH A PRESSURE-BASED PROCEDURE

Abstract

First, a pressure-based procedure is developed for the prediction of three-dimensional steady incompressible flows using the general curvilinear coordinate system. In this procedure, a nonstaggered grid is adopted, and the covariant velocity components are used as the main variables when solving the momentum equations. To validate the present algorithm, it is applied to predict the three-dimensional laminar flow in a 90° bend with square cross section. The computed velocity distributions are compared with the measurements and computations of others. Second, with the aid of the k-ϵ turbulence model, the procedure is applied to predict various duct flows. The performances of various wall functions are compared numerically.

Notes

Address correspondence to Dr. Yunliang Wang, Department of Chemical Engineering, Faculty of Engineering 36, Kyushu University, 6–10–1 Hakozaki, Fukuoka 812–81, Japan. E-mail: wang@flm. chem-eng.kyushu-u.ac.jp