Laminar to turbulent flow transition in cross-corrugated-plate cavities

摘要

It is a common knowledge that the laminar to turbulent flow transition in a pipe or a channel (including cross-corrugated-plate geometries) improves heat transfer and increases pressure loss. Because the two effects are counteractive, it is useful to know when this transition takes place, and what is the magnitude of the improvements so that an optimum flow rate can be selected. Therefore, in this numerical study, the laminar to turbulent flow transition in cross-corrugated channels is investigated using the commercially available CFX-FLOW3D software. The results provided in this paper specify the values of Re_(cr) for flow in such channels with β =30°45°and 60° Also, the results show that while turbulent flow is better for steeper angles of inclination, such a selection for low angles of inclination is not easy to make.