Abstract
Parallel jets are of profound importance in design of nuclear reactor components as well as other industrial applications. Vertical flow through a sudden contraction split into four round jets was numerically investigated using computational fluid dynamics (CFD). Results showed that jet spacing and jet size are the main parameters influencing the resulting flow field. In the upstream, both radial and streamwise velocity profiles drastically changed on approaching the contraction plane. Downstream, the flow field remained symmetric about the main axis. Velocity decay rate was found to be influenced by jet spacing, size and mixing characteristics. The results provide useful insights into mixing of multiple confined jets.
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