On the Validity of the Adiabatic Spreading Assumption in Droplet Impact Cooling.
On the Validity of the Adiabatic Spreading Assumption in
Droplet Impact Cooling.
Healy, W. M.; Hartley, J. G.; Abdel-Khalik, S. I.
International Journal of Heat and Mass Transfer, Vol.
44, No. 20, 3869-3881, October 2001.
cooling; validity; droplets
The effect of heat transfer on the spreading of a water
droplet impacting a heated surface has been numerically
investigated. The aim is to assess the validity of
commonly made assumptions in spray cooling models which
ignore heat transfer during the droplet spreading
period. The results of this study indicate that while
the amount of heat transfer during the droplet spreading
period may, itself, be small, its impact on the liquid
coverage area and the subsequent heat transfer to the
resulting liquid film may be substantial.