Abstract
The mean flowfield of a turbulent jet issuing into a confined, uniform
counterflow was investigated computationally. Based on dimensional analysis, the jet
penetration length was shown to scale with jet-to-counterflow momentum flux ratio.
This scaling and the computational results reproduce the well-known correct limit of
linear growth of the jet penetration length for the unconfined case when the momentum
flux ratio is small. However, for the high momentum flux ratio case corresponding
to the confinement, the jet penetration length is shown to reach an asymptotic limit
of about 3.57 times the confining duct diameter. This conclusion is contrary to the
existing results which predict indefinite growth. A simple modification of an existing
similarity solution for the jet in an unconfined counterflow provides a convenient
framework for presenting the results of the flowfield and jet penetration length.
| Original language | English |
|---|---|
| Pages (from-to) | 713–729 |
| Journal | Sadhana |
| Volume | 39 |
| Issue number | 3 |
| Early online date | 1 May 2014 |
| DOIs | |
| Publication status | Published - 2014 |
Bibliographical note
This article has been published in an open access journal, copyright: Indian Academy of SciencesKeywords
- Turbulent jet
- counterflow
- penetration length
- computational fluid
- dynamics
- similarity solution.