TITLE:
Numerical Study of a Three-Dimensional Laminar Flow in a Rectangular Channel with a 180-Degree Sharp Turn
AUTHORS:
Takashi Yoshida
KEYWORDS:
180-Degree Sharp Turn Channel, Three Dimensional Steady Flow, Limiting Streamline, Topological Theory
JOURNAL NAME:
Open Journal of Fluid Dynamics,
Vol.14 No.3,
September
11,
2024
ABSTRACT: This study presents a numerical analysis of three-dimensional steady laminar flow in a rectangular channel with a 180-degree sharp turn. The Navier-Stokes equations are solved by using finite difference method for Re = 900. Three-dimensional streamlines and limiting streamlines on wall surface are used to analyze the three-dimensional flow characteristics. Topological theory is applied to limiting streamlines on inner walls of the channel and two-dimensional streamlines at several cross sections. It is also shown that the flow impinges on the end wall of turn and the secondary flow is induced by the curvature in the sharp turn.