Impingement cooling is a mechanism of heat transfer by
means of collision, and can be achieved when a fluid jet strikes
a surface. Multiple impinging jets increases rates of heat
transfer considerably in comparison with single impinging jet.
If the colliding fluid is a liquid, the flow of the thin film often
gives rise to the formation of a complicated fluid dynamic
phenomenon of circular hydraulic jump. The interaction
between the hydraulic jumps formed due to multiple impinging
jets creates interesting hydraulic jump interaction patterns.
Depending on the spacing between the jets, their configuration,
and their relative strengths, different kinds of hydraulic jump
interactions are possible, resulting in a variety of flow patterns
such as ‘upwash’ formation due to two closely spaced
impinging liquid jets. The present study experimentally
elucidates the jump–jump interactions formed due to normal
impingement of two, three, and four liquid jets simultaneously
on a flat horizontal surface. In case of more than two impinging
jets, multiple stagnation lines are formed and these stagnation
lines interact with each other giving rise to interesting flow
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.