Novel turbulence control strategy for simultaneously achieving friction drag reduction and heat transfer augmentation

Koji Fukagata, Kaoru Iwamoto, Nobuhide Kasagi

Research output: Contribution to conferencePaper

14 Citations (Scopus)

Abstract

An attempt is made for simultaneous, but independent control of skin friction reduction and heat transfer enhancement in a turbulent channel flow. First, a mathematical relation is derived of the contribution of turbulent heat flux to the Nusselt number. Two different thermal boundary conditions are considered: (1) isothermal condition, where two walls are kept at constant, but different temperatures; (2) isoflux condition, where both walls are heated at a given wall heat flux. By utilizing the difference between the derived relation and the similar relation for the skin friction (Fukagata et al., 2002), a strategy for the simultaneous control is proposed. The effects of the control strategy are examined by means of direct numerical simulation.

Original languageEnglish
Pages307-312
Number of pages6
Publication statusPublished - 2005 Dec 1
Externally publishedYes
Event4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4 - Williamsburg, VA, United States
Duration: 2005 Jun 272005 Jun 29

Other

Other4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4
CountryUnited States
CityWilliamsburg, VA
Period05/6/2705/6/29

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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  • Cite this

    Fukagata, K., Iwamoto, K., & Kasagi, N. (2005). Novel turbulence control strategy for simultaneously achieving friction drag reduction and heat transfer augmentation. 307-312. Paper presented at 4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4, Williamsburg, VA, United States.