Parametric study on the heat transfer characteristics in a circular tube with helical tape insert under laminar flow conditions

Shiva Kumar, Pijakala Dinesha, Akshith Narayanan, Rahul Nanda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In the present study, the effect of a helical coiled tape on the heat transfer characteristics in a tubular heat exchanger has been studied. Numerical analysis is carried out in a tubular heat exchanger with a helical coiled tape insert under laminar flow conditions. The heat transfer characteristics, like Nusselt number (Nu) and friction factor (f), have been determined. Numerical modeling is undertaken and validated using analytical results. To study the parametric variation, simulation is carried out for different width ratios (WR) and twist ratios (TRs). It is observed that Nu increases as the WR is increased and the TR is reduced. The thermohydraulic performance index (THPI) is measured and found to be higher for a combination of a higher WR and a higher TR. From the tested values, it is seen that for a combination of WR = 3 and TR = 1.25, the maximum THPI was observed. It is concluded that both the tape width and pitch will significantly influence the thermohydraulic characteristics in a tubular heat exchanger with a helical tape insert inserted.

Original languageEnglish
Pages (from-to)3384-3398
Number of pages15
JournalHeat Transfer - Asian Research
Volume48
Issue number7
DOIs
Publication statusPublished - 01-11-2019

Fingerprint

circular tubes
Die casting inserts
inserts
laminar flow
Laminar flow
Tapes
tapes
thermohydraulics
heat transfer
Heat transfer
Heat exchangers
heat exchangers
Nusselt number
friction factor
Numerical analysis
numerical analysis
Friction
simulation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

Cite this

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abstract = "In the present study, the effect of a helical coiled tape on the heat transfer characteristics in a tubular heat exchanger has been studied. Numerical analysis is carried out in a tubular heat exchanger with a helical coiled tape insert under laminar flow conditions. The heat transfer characteristics, like Nusselt number (Nu) and friction factor (f), have been determined. Numerical modeling is undertaken and validated using analytical results. To study the parametric variation, simulation is carried out for different width ratios (WR) and twist ratios (TRs). It is observed that Nu increases as the WR is increased and the TR is reduced. The thermohydraulic performance index (THPI) is measured and found to be higher for a combination of a higher WR and a higher TR. From the tested values, it is seen that for a combination of WR = 3 and TR = 1.25, the maximum THPI was observed. It is concluded that both the tape width and pitch will significantly influence the thermohydraulic characteristics in a tubular heat exchanger with a helical tape insert inserted.",
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Parametric study on the heat transfer characteristics in a circular tube with helical tape insert under laminar flow conditions. / Kumar, Shiva; Dinesha, Pijakala; Narayanan, Akshith; Nanda, Rahul.

In: Heat Transfer - Asian Research, Vol. 48, No. 7, 01.11.2019, p. 3384-3398.

Research output: Contribution to journalArticle

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