Numerical Analysis of Flow and Heat Transfer Enhancement in A Horizontal Pipe with Plain and Dimple Twisted Tape

Authors

  • Harish H. V. Department of Mechanical Engineering, Government Engineering College, Hassan, India
  • Manjunath K. Department of Mechanical Engineering, Government Engineering College, Hassan, India
  • Rangaswamy T. Department of Mechanical Engineering, Government Engineering College, Mosale Hosahalli, Hassan District, India

DOI:

https://doi.org/10.37934/arfmts.82.2.106119

Keywords:

Convection heat transfer, Friction factor, Hemispherical twisted tape, Laminar flow, Thermo-hydraulic

Abstract

In order to improve thermo-hydraulic performance of laminar flow various techniques has been used among which a plain tube with twisted tape insert is widely used. The main objective is to numerically study flow field in order to enhance heat transfer, through a circular pipe built in with/without Dimples on twisted strip. Effect of plain and dimple strip on thermo hydraulic performance discussed. The analysis results for laminar range of 800<Re<2000 is obtained with twist ratio of the strip is 3.0. Analysis is carried for full length tape with constant heat flux. The simulation results of Nusselt number versus Reynolds number of the plain, plain twisted tape and Dimple twisted tape with the experimental data give variation of 2.5, 5.75 and 9.5%. The friction factor of Dimple twisted tape tube is 6 to 13 times that of the plain tube. The thermal performance factor of the Dimple twisted tape and plain twisted tape tube is 4 to 15% and 3 to 12 % respectively higher than that of plain tube. Due to increase in thermal performance factor of induced strip with dimples there is an intensification of heat transfer obtained through circular duct with dimple twisted tape insert than that of plain twisted tape and plain pipe. The use of a twisted tube compounded with dimples is feasible in terms of energy saving at lower Reynolds numbers. Present study is applicable for design of compact heat exchanger in order to optimize energy consumption.

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Published

2021-05-09

How to Cite

Harish H. V., Manjunath K., & Rangaswamy T. (2021). Numerical Analysis of Flow and Heat Transfer Enhancement in A Horizontal Pipe with Plain and Dimple Twisted Tape. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 82(2), 106–119. https://doi.org/10.37934/arfmts.82.2.106119

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