Author(s)

S. Talebi, E. Shirani

Abstract

Effects of non-reflecting boundary conditions on the convergence rate and the size of solution domain S. Talebi', E. Shirani* ^ Yazd University, Yazd, Iran ^Isfahan University of Technology, Isfahan, Iran Abstract In this paper effects of boundary conditions at free boundaries and the size of solution domain have been studied. The locations of the boundaries can effect considerably the flow solution. Smaller solution domain causes to reduce the convergence rate and accuracy. The use of non-reflecting boundary conditions (NRBC) at the free boundaries decreases the sensitivity of the solution with regard to the location of the boundaries. In this study, 1-D and 2-D NRBC are used to simulate in viscid flow over a bump, and underexpanded jet. When NRBC is applied to the bump problem, the results show that the number of iterations can be reduced by up to seventy percent and it allows choosing smaller solution domain up to twenty seven percent without loosing accuracy. For the unde

Keywords