Numerical investigation of turbulent heat transfer enhancement by generation of longitudinal vortices in sublayer

Book · Sun Dec 31 00:00:00 EST 1995

OSTI ID:455399

Eichholz, A; Bergmann, J; Fiebig, M; Mitra, N K ^[1]

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1. Ruhr-Univ. Bochum (Germany). Inst. fuer Thermo- und Fluiddynamik

Heat transfer enhancement by generation of longitudinal vortices in the viscous sublayer of turbulent channel flows has been numerically investigated. Longitudinal vortices have been generated by rectangular winglets of the size of roughness elements. Flow fields have been calculated by solving three-dimensional Reynolds averaged Navier-Stokes equations and thermal energy equation. Turbulence has ben modeled by low Reynolds number {kappa}-{epsilon} model. Results show that depending on the angle of attack of winglets the average Nusselt number Nu in the channel with vortex generators can increase by a factor of 400% over the plain channel.

• OSTI ID: 455399
• Report Number(s): CONF-951135-; ISBN 0-7918-1752-0; TRN: IM9716%%248
• Resource Relation: Conference: 1995 International mechanical engineering congress and exhibition, San Francisco, CA (United States), 12-17 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Heat transfer in turbulent flows -- 1995. HTD-Volume 318; Anand, N.K. [ed.] [Texas A and M Univ., College Station, TX (United States)]; Amano, R.S. [ed.] [Univ. of Wisconsin, Milwaukee, WI (United States)]; Armaly, B.F. [ed.] [Univ. of Missouri, Rolla, MO (United States)]; PB: 174 p.
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
HEAT TRANSFER
TURBULENT FLOW
AUGMENTATION
NUMERICAL ANALYSIS
VORTICES
FLOW MODELS
CONFIGURATION
THEORETICAL DATA