Gk. Morris et al., PREDICTION OF JET IMPINGEMENT HEAT-TRANSFER USING A HYBRID WALL TREATMENT WITH DIFFERENT TURBULENT PRANDTL NUMBER FUNCTIONS, Journal of heat transfer, 118(3), 1996, pp. 562-569
The local heat transfer coefficient distribution on a square heat sour
ce due to a normally impinging, axisymmetric, confined and submerged l
iquid jet was computationally investigated. Numerical predictions were
made for nozzle diameters of 3.18 and 6.35 mm at several nozzle-to-he
at source spacings, with turbulent jet Reynolds numbers ranging from 8
500 to 13,000. The commercial finite-volume code FLUENT was used to so
lve the thermal and flow fields using the standard high-Reynolds numbe
r k-epsilon turbulence model. The converged solution obtained from the
code was refined using a post-processing program that incorporated se
veral near-wall models. The role of four alternative turbulent Prandtl
number functions on the predicted heat transfer coefficients was inve
stigated. The predicted heat transfer coefficients were compared with
previously obtained experimental measurements. The predicted stagnatio
n and average heat transfer coefficients agree with experiments to wit
hin a maximum deviation of 16 and 20 percent, respectively. Reasons fo
r the differences between the predicted and measured heat transfer coe
fficients are discussed.