Comparative study on thermal performance of twisted tape and wire coil inserts in turbulent flow using CuO/water nanofluid

Naik, M.T.; Fahad, Syed Sha; Sundar, L. Syam; Singh, Manoj K.

doi:10.1016/j.expthermflusci.2014.04.006

Cited by 89 publications

(19 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They reported that the highest thermal performance factor of around 1.25 is found by using DI-coil (decreasing coil pitch ratio arrangement). Heat transfer and friction factor analysis of CuO/water nanofluid flowing through a tube under turbulent flow conditions and with twisted tape (TT) and wire coil (WC) inserts were presented by Naik et al [84]. They found that the thermal performance factor of 0.3% nanofluid in tube with twisted tape and wire coil inserts are 1.24 and 1.36 compared against water data respectively.…”

Section: Vortex Rings the Influence Of Inclined Vortex Rings (Vr) Onmentioning

confidence: 96%

Review of heat transfer enhancement methods: Focus on passive methods using swirl flow devices

Sheikholeslami

Gorji-Bandpy

Ganji

2015

Renewable and Sustainable Energy Reviews

418

View full text Add to dashboard Cite

Section: Vortex Rings the Influence Of Inclined Vortex Rings (Vr) Onmentioning

confidence: 96%

Review of heat transfer enhancement methods: Focus on passive methods using swirl flow devices

Sheikholeslami

Gorji-Bandpy

Ganji

2015

Renewable and Sustainable Energy Reviews

418

View full text Add to dashboard Cite

“…So, this indicates that there may be a possibility of further augmentation of heat transfer by using turbulent promoters. Nanofluids flow in a tube with different kind of inserts is also available in the literature [26][27][28][29][30][31], but they considered single-nanoparticles for the preparation of nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer and friction factor of multi-walled carbon nanotubes–Fe 3 O 4 nanocomposite nanofluids flow in a tube with/without longitudinal strip inserts

Sundar

Otero‐Irurueta

Singh

et al. 2016

International Journal of Heat and Mass Transfer

Self Cite

View full text Add to dashboard Cite

“…They reported that the CC-TT inserts enhanced thermal enhancement factor (TEF) up to 20% over those of tube inserted with typical twisted tape. Naik et al (2014) examined the influence of twisted tape combined with wire coil on the heat transfer augmentation behavior by using nanofluid as the testing fluid at different CuO/water volume concentrations, twist ratios and pitch ratios. In general, heat transfer increased with increasing nanofluid concentration.…”

Section: Introductionmentioning

confidence: 99%

Thermohydraulic performance evaluation of heat exchangers equipped with centrally perforated twisted tape: Laminar and turbulent flows

Ruengpayungsak

Saysroy

Wongcharee

et al. 2019

JTST

View full text Add to dashboard Cite

Convective heat transfer enhancement in a round tube mounted with a centrally perforated twisted tape (CP-TT) was numerically investigated. Influences of space of cut ratio (s/w = 0.5, 0.7 and 0.9) and twist ratio (y/w = 2.0, 3.0 and 4.0) under laminar and turbulent flow regimes on heat transfer characteristics were determined. Numerical encompassed Reynolds numbers (Re) from 400 to 2000 for laminar flow and 5000 to 15,000 for turbulent flow. At a given Reynolds number, the tubes with centrally perforated twisted tape (CP-TT) inserts offer higher heat transfer rate than those the plain tube alone. Heat transfer enhancement in a round tube equipped with centrally perforated twisted tape (CP-TT) is strongly dependent on twist ratio (y/w) and space of cut ratio (s/w). The results also found that the heat transfer rate (Nu) and friction factor (f) increase as twist ratio (y/w) and space of cut ratio (s/w) decreases. The thermal enhancement factor () increases as space of cut ratio (s/w) and twist ratio (y/w) decreases in laminar flow regime while the opposite trend is observed in the turbulent flow regime. Over the studied range, the tube equipped with centrally perforated twisted tape (CP-TT) with s/w = 0.5 and y/w = 2.0 gives the maximum thermal enhancement factor () of 8.92 for laminar flow at Re = 2000. In turbulent flow at Re = 5000, the centrally perforated twisted tape (CP-TT) with s/w = 0.9 and y/w = 3.0 yields the maximum thermal enhancement factor () of 1.33. In addition, the flow structure, temperature field and local Nusselt number of heat exchanger tubes equipped with centrally perforated twisted tape (CP-TT) are also reported for the clarification of heat transfer and flow topology mechanisms.

show abstract

Comparative study on thermal performance of twisted tape and wire coil inserts in turbulent flow using CuO/water nanofluid

Cited by 89 publications

References 44 publications

Review of heat transfer enhancement methods: Focus on passive methods using swirl flow devices

Review of heat transfer enhancement methods: Focus on passive methods using swirl flow devices

Heat transfer and friction factor of multi-walled carbon nanotubes–Fe 3 O 4 nanocomposite nanofluids flow in a tube with/without longitudinal strip inserts

Thermohydraulic performance evaluation of heat exchangers equipped with centrally perforated twisted tape: Laminar and turbulent flows

Contact Info

Product

Resources

About