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PENETRATIVE CONVECTION IN POROUS MEDIUM BOUNDED BY A HORIZONTAL WALL WITH HOT AND COLD SPOTS.

Author(s) : POULIKAKOS D., BEJAN A.

Type of article: Article

Summary

MODELLING THE PROBLEM AS TWO-DIMENSIONAL, AND ASSUMING THAT THE HORIZONTAL WALL TEMPERATURE VARIES BETWEEN ALTERNATING HOT AND COLD SPOTS, IT IS FOUND THAT THE NATURAL CIRCULATION CONSISTS OF A ROW OF COUNTER-ROTATING CELLS SITUATED NEAR THE WALL. EACH CELL PENETRATES VERTICALLY INTO THE POROUS MEDIUM. THE ABILITY OF EACH CELL TO CONVECT HEAT BETWEEN TWO ADJACENT SPOTS INCREASES WITH THE RAYLEIGH NUMBER. THE NUMERICAL SIMULATIONS IN THE RAYLEIGH RANGE 1-100 ARE FOUND TO SUPPORT A NUMBER OF SCALING LAWS DERIVED BASED ON PURE SCALING ARGUMENTS.

Details

  • Original title: PENETRATIVE CONVECTION IN POROUS MEDIUM BOUNDED BY A HORIZONTAL WALL WITH HOT AND COLD SPOTS.
  • Record ID : 1985-0982
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 27 - n. 10
  • Publication date: 1984/10

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