Author(s): Xin Li, Jianmin ZHANG

Linked Author(s): Xin Li, Jianmin ZHANG

Keywords: Offset jet; Critical Reynolds number; Flow pattern;

Abstract: The offset jet issuing into a narrow chamber was investigated by using the standard k-ε model with the volume-of-fluid (VOF) method. The commercially available CFD software ANSYS FLUENT version 15 was used for the purpose. In this study, the offset ratio, expansion ratio, and submergence ratio are fixed, the initial bulk velocity of the jet was varied from 2 ~ 6 m/s to change the Reynolds number. It is demonstrated that the flow pattern strongly dependent on Reynolds number. The surface attaching flow will be formed when the Re< 4×105, and floor attaching flow will form when Re ≥ 4×105, it follows that the critical Reynolds number should occur at Recr=4×105. Attention is given that two big vertical vortexes can be found in surface attaching jet, and single big vertical vortex above the jet in floor attaching jet.

DOI: https://doi.org/10.3850/38WC092019-1132

Year: 2019