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MELTING OF A VERTICAL ICE WALL BY FREE CONVECTION INTO FRESH WATER.

Author(s) : WILSON N.W., LEE J. J.

Type of article: Article

Summary

A STEADY-STATE TWO-DIMENSIONAL FINITE DIFFERENCE ANALYSIS IS PRESENTED FOR THE HEAT AND MOMENTUM TRANSFER RESULTING WHEN THE LEADING PORTION OF A SEMI-INFINITE VERTICAL ICE SHEET AT 273K (0.C) MELTS INTO FRESH WATER BY NATURAL CONVECTION. FLUID PROPERTIES ARE ASSUMED TO BE CONSTANT AND ARE EVALUATED BEYOND THE EDGES OF THE BOUNDARY LAYERS WITH THE EXCEPTION OF FLUID DENSITY WHICH VARIES WITH THE LOCAL TEMPERATURE. RESULTS OF THE ANALYSIS ARE PRESENTED FOR FREESTREAM TEMPERATURES FROM 273 TO 297 K (0 TO 24.C). THEY INCLUDE STREAMLINES, VELOCITY PROFILES, MELT VELOCITIES, AND AVERAGE NUSSELT NUMBERS FOR THE LEADING 0.7632 M PORTION OF A SEMI-INFINITE ICE SHEET. OVERALL, THE RESULTS SHOW THREE DISTINCT FLOW REGIMES: STEADY UPWARD FLOW FOR T NOT HIGHER THAN 277.5 K (4.5.C), STEADY DOWNWARD FLOW FOR T NOT LOWER THAN 279K (6.C) AND STEADY DUAL OR BI-DIRECTIONAL FLOW FOR 278.7K (5. 7.C) NOT HIGHER THAN T NOT HIGHER THAN 279 K (6.C). IN THE RANGE 277.5 K SOLUTION FAILED TO CONVERGE AND SINCE THE METHOD IS CAPABLE OF ACCOUNTING FOR LOCAL RECIRCULATIONS, IT IS SUGGESTED THAT THIS FLOW REGIME MAY BE TRANSITORY IN NATURE.

Details

  • Original title: MELTING OF A VERTICAL ICE WALL BY FREE CONVECTION INTO FRESH WATER.
  • Record ID : 1982-0043
  • Languages: English
  • Source: J. Heat Transf. - vol. 103 - n. 1
  • Publication date: 1981/02
  • Document available for consultation in the library of the IIR headquarters only.

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