抄録
The steady laminar flow through multiple pipe bends, which form a coiled pipe with periodically changing the plane of curvature, is studied. The heat transfer is analyzed by calculating the temperature and velocity fields, and due to the changing of the plane of curvature, the size and angle of the twin vortices periodically change in multiple pipe bends. The mixing performance is evaluated as the length of the convolute line of the trajectories of points, local and mean Lyapunov exponents, and the fractal dimension of Poincare map.
