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THE ROLE OF TRANSITION IN DETERMINING FRICTION AND HEAT TRANSFER IN SMOOTH AND ROUGH PASSAGES.

Author(s) : OBOT N. T., ESEN E. B., RABAS T. J.

Type of article: Article

Summary

ACCORDING TO THE PROPOSED LAW OF CORRESPONDING STATES FOR FRICTION, DIFFERENT TYPES OF ROUGHNESS ELEMENTS EXHIBIT THE SAME BEHAVIOUR FOR FRICTION AT THE SAME REDUCED CONDITIONS, AS IS THE CASE FOR SMOOTH PASSAGES OF ARBITRARY SHAPES. FOR SMOOTH OR ROUGH TUBES, IT APPEARS THAT THE AVERAGE HEAT TRANSFER COEFFICIENT DECREASES WITH INCREASING CRITICAL REYNOLDS NUMBER FOR TRANSITION. FOR NON-CIRCULAR SMOOTH PASSAGES, AVERAGE HEAT TRANSFER COEFFICIENTS CAN BE CALCULATED FROM THE CIRCULAR TUBE RELATIONS, PROVIDED THE CRITICAL VALUES FOR FRICTION FACTOR AND REYNOLDS NUMBER ARE KNOWN.

Details

  • Original title: THE ROLE OF TRANSITION IN DETERMINING FRICTION AND HEAT TRANSFER IN SMOOTH AND ROUGH PASSAGES.
  • Record ID : 1991-1493
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 33 - n. 10
  • Publication date: 1990/10

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