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NUMERICAL COMPUTATION OF CONVECTIVE HEAT TRANSFER IN COMPLEX TURBULENT FLOWS: TIME TO ABANDON WALL FUNCTIONS.

Author(s) : LAUNDER B. E.

Type of article: Article

Summary

IN APPLYING FINITE-DIFFERENCE AND OTHER NUMERICAL APPROACHES TO THE COMPUTATION OF ELLIPTIC OR THREE-DIMENSIONAL TURBULENT FLOWS IT IS USUAL TO ADOPT WALL FUNCTIONS TO BRIDGE WITH A SINGLE CELL THE VERY THIN REGION ADJACENT TO THE WALL WHERE VISCOSITY MODIFIES THE TURBULENCE STRUCTURE. THE PAPER SUGGESTS THAT IN MANY CASES, SUCH APPROACHES MAY BE REPLACED TO ADVANTAGE BY A FINE-GRID, NEAR-WALL TREATMENT THAT EXTENDS THE NUMERICAL COMPUTATIONS THROUGH THE BUFFER ZONE TO THE WALL ITSELF. EXAMPLES ARE GIVEN OF THREE FLOWS WHERE THE ABANDONMENT OF THE WALL-FUNCTION APPROACH HAS LED TO A MARKED IMPROVEMENT IN THE PREDICTION OF CONVECTIVE HEAT TRANSFER RATES.

Details

  • Original title: NUMERICAL COMPUTATION OF CONVECTIVE HEAT TRANSFER IN COMPLEX TURBULENT FLOWS: TIME TO ABANDON WALL FUNCTIONS.
  • Record ID : 1985-1029
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 27 - n. 9
  • Publication date: 1984

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