2. Consider the solidification of a falling film of paraffin wax. H y Solidified layer of...
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2. Consider the solidification of a falling film of paraffin wax. H y Solidified layer of paraffin m Boundary layer flow 18 Liquid paraffin, To The vertical isothermal wall, Tw=20C, is placed in contact with an isothermal pool of paraffin, Too =35C. Since the solidification point of this paraffin is Tm=27.5C, the wall becomes covered with a thin layer of solidified paraffin. Show that under steady-state conditions, the thickness of the solidified layer, L(y), is proportional to the laminar boundary layer thickness. Determine the expression for L numerically and plot to scale the L(y) shape of the solidified layer. The relevant properties of liquid paraffin are kr = 0.15 W/m-K, B = 8.5x10-4 K-, a = 9 x 104 cm/s, and Pr = 56. The thermal conductivity of solid paraffin is ks = 0.36 W/m-K. The overall height of the isothermal wall is H = 10 cm. 2. Consider the solidification of a falling film of paraffin wax. H y Solidified layer of paraffin m Boundary layer flow 18 Liquid paraffin, To The vertical isothermal wall, Tw=20C, is placed in contact with an isothermal pool of paraffin, Too =35C. Since the solidification point of this paraffin is Tm=27.5C, the wall becomes covered with a thin layer of solidified paraffin. Show that under steady-state conditions, the thickness of the solidified layer, L(y), is proportional to the laminar boundary layer thickness. Determine the expression for L numerically and plot to scale the L(y) shape of the solidified layer. The relevant properties of liquid paraffin are kr = 0.15 W/m-K, B = 8.5x10-4 K-, a = 9 x 104 cm/s, and Pr = 56. The thermal conductivity of solid paraffin is ks = 0.36 W/m-K. The overall height of the isothermal wall is H = 10 cm.
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Fundamentals Of Momentum Heat And Mass Transfer
ISBN: 9781118947463
6th Edition
Authors: James Welty, Gregory L. Rorrer, David G. Foster
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