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Numerical Heat Transfer Prediction for Laminar Flow in a Circular Pipe with a 90° Bend

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Abstract

Laminar air flow in a 90° bend has been studied numerically to investigate convective heat transfer, which is of practical relevance to electronic systems and refrigeration piping layout. CFD simulations are performed for Reynolds number in the range 200 to 1000 at different bend radius ratios (5, 10 and 20). The heat transfer characteristics are found to be enhanced in the curved pipe compared to a straight pipe, which are subjected to the same flow rate. The curvature and buoyancy effectively increase heat transfer in viscous laminar flows. The correlation between the flow structure and the heat transfer is found to be strong.

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Abbreviations

Cp :

Specific heat at constant pressure, J/kg K

D:

Pipe diameter, mm

h:

Heat transfer coefficient, W/m2K

Nu:

Nusselt number

p:

Pressure, Pa

q:

Heat flux, W/m2

Re:

Reynolds number

r:

Curvature radius, mm

T:

Temperature, K

u:

Velocity, m/s

k:

Thermal conductivity, W/mK

ρ:

Fluid density, kg/m3

υ:

Kinematic viscosity, m2/s

m:

Mean

w:

Wall

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Veer Surendra Sai University of Technology, Burla, Odisha, 768018, India

    Pandaba Patro

  2. Department of Mechanical Engineering, Kalinga Institute of Industrial Technology University, Bhubaneswar, Odisha, 751024, India

    Ani Rout

  3. Department of Mechanical Engineering, College of Engineering and Technology, Bhubaneswar, Odisha, 751003, India

    Ashok Barik

Authors
  1. Pandaba Patro
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  2. Ani Rout
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  3. Ashok Barik
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Correspondence to Pandaba Patro.

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Patro, P., Rout, A. & Barik, A. Numerical Heat Transfer Prediction for Laminar Flow in a Circular Pipe with a 90° Bend. J. Inst. Eng. India Ser. C 99, 323–327 (2018). https://doi.org/10.1007/s40032-017-0357-y

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  • DOI: https://doi.org/10.1007/s40032-017-0357-y

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