Enhancement of Jet Impingement Heat Transfer by Means of Jet Axis Switching

John M. Gorman, Ephraim M. Sparrow, Abhimanyu Ghosh, John P. Abraham

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations


The method of numerical simulation has been used here to establish the heat transfer characteristics of a fluid jet impinging on a target surface. In particular, it was demonstrated that a fluid mechanic phenomenon designated as jet axis switching has a tremendous effect on both the magnitude and surface distribution of the impingement heat transfer coefficient. The neglect of this phenomenon, which has been common in the literature on jet impingement heat transfer, gives rise to significant inaccuracies in the predicted values of the heat transfer coefficient. As an essential prelude to the heat transfer analysis, the fluid mechanics of jet impingement were set forth in detail in order to document the jet-axis switching phenomenon. For this purpose, color contour and velocity vector diagrams are displayed to show the change of shape experienced by the jet as it passes through an unconfined space. The local heat transfer coefficient at all points of the impingement plate was determined. The highest values of the Nusselt number do not occur when the plate is nearest to the origin of the jet. Off-axis peaks of the local Nusselt number were found to exist at locations between z/b = 0 and 3 for respective impingement plate positions Xmax/b = 30 and 10. The numerical predictions compared favorably with experimental results from the literature.

Original languageEnglish (US)
Title of host publicationAdvances in Heat Transfer
EditorsEphraim M. Sparrow, John P. Abraham, John M. Gorman
PublisherAcademic Press
Number of pages41
ISBN (Print)9780128151853
StatePublished - Jan 1 2018

Publication series

NameAdvances in Heat Transfer
ISSN (Print)0065-2717

Bibliographical note

Publisher Copyright:
© 2018 Elsevier Inc.


  • Axis switching
  • CFD
  • Heat transfer
  • Jet impingement
  • Rectangular jet
  • Slot jet


Dive into the research topics of 'Enhancement of Jet Impingement Heat Transfer by Means of Jet Axis Switching'. Together they form a unique fingerprint.

Cite this