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UNSTEADY FORCED CONVECTIVE HEAT TRANSFER FROM A HOT FILM IN NONREVERSING AND REVERSING SHEAR FLOW.

Author(s) : KAIPING P.

Type of article: Article

Summary

THE HEAT FLUX FROM A CONSTANT TEMPERATURE HOT FILM MOUNTED FLUSH WITH THE SURFACE OF A PLANE INSULATING WALL IS EXAMINED NUMERICALLY ASSUMING THAT THE THERMAL BOUNDARY LAYER THEORY IS APPLICABLE EVERYWHERE AND AT ALL TIMES. THE FLOW FIELD IS DESCRIBED BY A PULSATING OR A LINEARLY DECELERATING TWO-DIMENSIONAL SHEAR FLOW. FOR HIGH FREQUENCIES THE CALCULATED UNSTEADY HEAT TRANSFER DEPARTS STRONGLY FROM THE QUASI-STEADY VALUE. IN REVERSING FLOW A CONSIDERABLE INFLUENCE OF THE THERMAL WAKE CAN BE SEEN. COMPUTATIONS OF THE TIME AVERAGED HEAT FLUX SHOW THAT AN ENHANCEMENT OF HEAT TRANSFER DUE TO SUPERIMPOSED OSCILLATIONS CAN ONLY OCCUR IN REVERSING FLOW.

Details

  • Original title: UNSTEADY FORCED CONVECTIVE HEAT TRANSFER FROM A HOT FILM IN NONREVERSING AND REVERSING SHEAR FLOW.
  • Record ID : 1984-1375
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 26 - n. 4
  • Publication date: 1983/04

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