Wilko Rohlfs
Institute of Heat and Mass Transfer, RWTH Aachen University, 52062 Aachen, Germany
Johannes Jorg
Institute of Heat and Mass Transfer, RWTH Aachen University, Aachen, 52056, Germany
Claas Ehrenpreis
Institute of Heat and Mass Transfer, RWTH Aachen University, Aachen, 52056, Germany
Manuel Rietz
Institute of Heat and Mass Transfer, RWTH Aachen University, Aachen, 52056, Germany
Herman Haustein
Tel Aviv University
Reinhold Kneer
Institute of Heat and Mass Transfer, RWTH Aachen University, Aachen, 52062,
Germany
Impinging jets are well known for their high heat/mass transfer rates, widely employed in industrial cooling
and drying processes and as such have been investigated extensively. The present paper provides a comprehensive description of laminar free-surface and submerged impinging jets by summarizing the understanding
gained in recent studies by the authors. In a previous study, a correlation was formulated for free-surface and
submerged jets. However, the validity of the correlation was limited to idealized conditions, e.g. the absence
of vortices. This paper experimentally and numerically examines the flow field of submerged jets under the
presence of low amplitude perturbations, showing different types of vortex structures and mechanisms of jet
breakup.