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Investigation of laminar to turbulent transition phenomena effects on impingement heat transfer

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Abstract

Turbulent impinging air flow is investigated numerically by using the ANSYS-CFX® code. All computations are performed by considering three-dimensional, steady, and incompressible flow. Three different Reynolds averaged Navier–Stokes (RANS) turbulence models and two Reynolds stress models (RSM’s) are employed. Furthermore three different laminar to turbulent transition (LTT) models are employed with the shear stress transport (SST) and the baseline (BSL) models. Results show that predictions of the SST and two RSM’s are very close each other and these models’ results are in better agreement with the experimental data when all Reynolds numbers used in this study are considered. Secondary maxima in Nusselt number can be seen only if the LTT formula is employed with SST and BSL models.

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Abbreviations

D:

Jet diameter (m)

ε:

Turbulent dissipation rate (m2/s3)

h:

Convective heat transfer coefficient (W/m2 K)

k:

Turbulence kinetic energy (m2/s2)

λ:

Thermal conductivity (W/mK)

µ:

Dynamic viscosity (kg m/s)

µt :

Turbulent viscosity

Nux :

Local Nusselt number (=hD/λ)

P:

Pressure (Pa)

Re:

Reynolds number (=UD/ν)

ρ:

Density (kg/m3)

τ:

Shear stress (N/m2)

T:

Temperature (K)

Tu:

Inlet turbulence intensity

x:

Distance from stagnation point (m)

ν:

Kinematic viscosity (m2/s)

ω:

Specific dissipation rate (s−1)

z:

Distance between jet and surface (m)

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Authors and Affiliations

  1. Department of Mechanical Engineering, Bursa Technical University, Osmangazi Campus, 16190, Bursa, Turkey

    Mustafa Kemal Isman

  2. Department of Aerospace Engineering, Penn State University, 233C Hammond Building, University Park, PA, 16802, USA

    Philip J. Morris

  3. Department of Mechanical Engineering, Uludag University, Gorukle Campus, 16059, Bursa, Turkey

    Muhiddin Can

Authors
  1. Mustafa Kemal Isman
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  2. Philip J. Morris
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  3. Muhiddin Can
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Correspondence to Mustafa Kemal Isman.

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Isman, M.K., Morris, P.J. & Can, M. Investigation of laminar to turbulent transition phenomena effects on impingement heat transfer. Heat Mass Transfer 52, 2027–2036 (2016). https://doi.org/10.1007/s00231-015-1719-8

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  • DOI: https://doi.org/10.1007/s00231-015-1719-8

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