Apex angle effects on the swirling flow between cones induced by means of a tangential inlet

A numerical resolution of the laminar swirling flow between two fixed cones having the same apex angle is presented in the case where the fluid is tan gentially introduced at the system base. The resolution of the momentum and continuity equations is done by using an implicit finite different scheme. Two conical configurations are considered. In the first one, named CG1, th e apex of the cones generatrix is located at the top with respect to the fl uid entrance, in the second one, named CG2, the apex is down. The calculati ons, which concern the three components of the velocity flow-held and the p ressure, allowed us to compare the swirl properties in the two studied situ ations with respect to a similar system made of two coaxial cylinders. The swirl intensity, calculated from the velocity held revealed that in the CG1 case the swirling motion is stronger and the swirl decay is delayed in com parison with the CG2 and the cylindrical cases. (C) 1999 Elsevier Science I nc. All rights reserved.