An experimental study on the spanwise eddy diffusivity of heat in a flat-plate turbulent boundary layer

Maekawa, Hiroshi; Kawada, Yoshitaka; Kobayashi, Mutsuo; Yamaguchi, Hideyo

doi:10.1016/0017-9310(91)90210-6

“…9, the spanwise eddy diffusivity of heat, ε hz , and kinematic viscosity, ε m , are compared with the experimental results of Maekawas group [3] which were measured in a turbulent boundary layer at Re = 770. In Fig.…”

Section: Spanwise Transfer Of Heatmentioning

confidence: 99%

“…Since ε hy is almost equal to ε m in the wall turbulence, Maekawas group [3] transformed the above equation into Since ε hy is almost equal to ε m in the wall turbulence, Maekawas group [3] transformed the above equation into…”

Section: __ _mentioning

confidence: 99%

Direct numerical simulation of a turbulent channel flow with a linear spanwise nonuniformity of time-mean temperature (Examination of the turbulence statistics)

Matsubara

¹

,

Kobayashi

²

,

Maekawa

³

et al. 1999

Heat Trans. Asian Res.

0

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Direct numerical simulation (DNS) was performed for a turbulent channel flow with the time‐mean temperature linearly varying in the spanwise direction. Spanwise heat transfer in wall turbulence was explored in this simple case where the turbulent heat flux has only a spanwise component. The computed flow field was confirmed to be in good agreement with the DNS database constructed by Kasagi and colleagues (1992). The general trend of the presently calculated spanwise eddy diffusivity of heat is similar to the experimental data reported by Maekawa and colleagues (1991). However, there is a considerable discrepancy between their results in the vicinity of the wall. The numerical results demonstrate that the spanwise turbulent heat flux is nearly in local equilibrium over the whole channel width excluding the viscous sublayer. © 1999 Scripta Technica, Heat Trans Asian Res, 28(8): 675–686, 1999

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“…In Fig. 9, the spanwise eddy diffusivity of heat, ε hz , and kinematic viscosity, ε m , are compared with the experimental results of Maekawas group [3] which were measured in a turbulent boundary layer at Re = 770. Since their Reynolds number is considerably larger than the present conditions, a nondimensionalization with U τ and δ is applied in Fig.…”

Section: Spanwise Transfer Of Heatmentioning

confidence: 99%

“…__ are the spanwise and wall-normal components of the Reynolds normal stress, respectively. Since ε hy is almost equal to ε m in the wall turbulence, Maekawas group [3] transformed the above equation into…”

Section: __ _ and Vmentioning

confidence: 99%

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Direct numerical simulation of a turbulent channel flow with a linear spanwise nonuniformity of time-mean temperature (Examination of the turbulence statistics)

Matsubara

¹

,

Kobayashi

²

,

Maekawa

³

et al. 1999

Heat Trans. Asian Res.

1

0

View full text Add to dashboard Cite

Direct numerical simulation (DNS) was performed for a turbulent channel flow with the time‐mean temperature linearly varying in the spanwise direction. Spanwise heat transfer in wall turbulence was explored in this simple case where the turbulent heat flux has only a spanwise component. The computed flow field was confirmed to be in good agreement with the DNS database constructed by Kasagi and colleagues (1992). The general trend of the presently calculated spanwise eddy diffusivity of heat is similar to the experimental data reported by Maekawa and colleagues (1991). However, there is a considerable discrepancy between their results in the vicinity of the wall. The numerical results demonstrate that the spanwise turbulent heat flux is nearly in local equilibrium over the whole channel width excluding the viscous sublayer. © 1999 Scripta Technica, Heat Trans Asian Res, 28(8): 675–686, 1999

show abstract

On the experimental data and applied models of turbulent heat transfer in near-wall flows

Polyakov¹

1993

J Eng Phys Thermophys

1

0

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An experimental study on the spanwise eddy diffusivity of heat in a flat-plate turbulent boundary layer

Cited by 8 publications

References 13 publications

Direct numerical simulation of a turbulent channel flow with a linear spanwise nonuniformity of time-mean temperature (Examination of the turbulence statistics)

Direct numerical simulation of a turbulent channel flow with a linear spanwise nonuniformity of time-mean temperature (Examination of the turbulence statistics)

Direct numerical simulation of a turbulent channel flow with a linear spanwise nonuniformity of time-mean temperature (Examination of the turbulence statistics)

On the experimental data and applied models of turbulent heat transfer in near-wall flows

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