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Free convection of water at 4°C from a vertical flat plate with step discontinuities in surface temperature

Postelnicu A.

International Journal of Applied Mechanics and Engineering

2007

Vol. 12, no 3

767-779

The free convection boundary layer of water at 4° C from a vertical flat plate with step discontinuities in surface temperature is investigated here. Under a convenient transformation of variabIes, the problem is cast into a pair of partial differential equations, which are numerically solved using the well-known Keller-box method. Temperature and veloeity field developments are presented for various values of the parameter 8w2 whieh represents the step discontinuity in the surface temperature for both Pr=ll.4 and Pr=7. The loeal heat tlux is calculated in a dimensionless form and is plotted vs the streamwise coordinate for both water in the extremum and in normal conditions of density .