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TRANSIENT NATURAL CONVECTION HEAT TRANSFER IN A MASS OF WATER COOLED THROUGH 277 K (4 DEG C).

Author(s) : VASSEUR P., ROBILLARD L.

Type of article: Article

Summary

THE TRANSIENT TWO-DIMENSIONAL LAMINAR NATURAL CONVECTION OF WATER, ENCLOSED IN RECTANGULAR CAVITIES WITH WALL TEMPERATURE MAINTAINED AT 273 K (0 DEG C) IS STUDIED ANALYTICALLY. THIS INVES--TIGATION IS CARRIED OUT IN ORDER TO STUDY THE INVERSION OF FLOW PATTERNS CAUSED BY THE MAXIMUM DENSITY OF WATER AT 277 K (4 DEG C). NUMERICAL SOLUTIONS ARE OBTAINED FOR CASES INVOLVING DIFFERENT ASPECT RATIOS AND INITIAL WATER TEMPERATURES VARYING BETWEEN 4 AND 21 DEG C. SOLUTIONS OF THE GOVERNING COUPLED SYSTEM OF PARTIAL DIFFERENTIAL EQUATIONS ARE OBTAINED USING AN ALTERNATING DIRECTION IMPLICIT FINITE DIFFERENCE METHOD. THE RESULTS ARE PRESENTED GRAPHICALLY IN THE FORM OF STREAM FUNCTION AND ISOTHERM CONTOUR PLOTS. THE HEAT TRANSFER THROUGH EACH WALL IS EVALUATED IN ORDER TO STUDY THE EFFECT OF THE DENSITY INVERSION ON THE COOLING PROCESS. IT IS ESTABLISHED NUMERICALLY THAT ONE OF THE CONSEQUENCES OF THE NONLINEARITY OF THE WATER IS TO CHANGE THE MAXIMUM E CAVITY TO THE BOTTOM ONE.

Details

  • Original title: TRANSIENT NATURAL CONVECTION HEAT TRANSFER IN A MASS OF WATER COOLED THROUGH 277 K (4 DEG C).
  • Record ID : 1981-1127
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 23 - n. 9
  • Publication date: 1980/09

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