Abstract: A uniformly accelerated laminar flow in a pipe, initially at rest, is analyzed. Onedimensional unsteady flow equations for startup flow were derived from the Navier–Stokes and continuity equations. The dynamical boundary ...

Abstract: Flow dynamics in a pipe with an abrupt change in diameter was experimentally and numerically analyzed. Two-dimensional stationary Reynolds-averaged Navier–Stokes (RANS) k–ε epsilon model was used to describe the development ...