Simulations of heat transfer in a boundary layer subject to free-stream turbulence

• The present study investigates the effects or the ambient, free-stream turbulence (FST) on the momentum and heat transfer in a turbulent flat-plate boundary layer via large-eddy simulations (LES) using the ADM-RT model. Due to a FST of 20%, the skin-friction coefficient c/and Stanton number St are substantially elevated up to 15% in the fully turbulent region. The depression of both the mean velocity and temperature profiles in the wake region due to the FST is observed, however, the influence on the wall-normal heat flux in the near-wall region is negligible. © 2009 International Symposium on Turbulence and Shear Flow Phenomena, TSFP09. All rights reserved.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)

Nyckelord

Boundary layer flow

Boundary layers

Friction

Heat flux

Heat transfer

Large eddy simulation

Shear flow

Turbulence

Flat plate boundary layers

Freestream turbulence

Mean velocities

Near-wall region

Skin friction coefficient

Temperature profiles

Turbulent regions

Wall-normal heat flux

Atmospheric thermodynamics

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