CFD simulation of heat transfer enhancement in circular tube with twisted tape insert by using nanofluids

Natarajan, Arivazhagan; Venkatesh, R.; Gobinath, S.; Devakumar, L.; Gopalakrishnan, Karthik

doi:10.1016/j.matpr.2019.06.717

Cited by 18 publications

(4 citation statements)

References 6 publications

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“…The rubbery state has no significant changes in thermal adsorption storage and loss modulus [27]. In the glass stage, the composite’s structure was controlled on the most significant thermal storage modulus [26, 28]. At the same time, the GTT state thermal storage modulus has decreased progressively on the sensitivity of temperature changes.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…It helps to increase the quality and a sufficient compact ratio is obtained during the final process. Similarly, the CFD technique observed the circular tube heat transfer with various thermal cycles [26]. The significance of glass transition temperature (GTT) and damping factor (dmax) for the epoxy composite was derived from digital analyzer trace points and its values were represented in Table 2.…”

Section: Methodsmentioning

confidence: 99%

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Influences of Various Thermal Cyclic Behaviours on Thermo Adsorption/Mechanical Characteristics of Epoxy Composite Enriched with Basalt Fiber

Karthikeyan¹,

Prabhu

Bhuvaneswari³

et al. 2023

Adsorption Science & Technology

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Exposure to advanced materials with unique thermomechanical characteristics has fulfilled the requirements of automotive, marine, and structural industries. The current research investigates the thermal adsorption and mechanical properties of epoxy composite enriched by basalt fiber via resin moulding technique with an applied pressure of 2 bar. Hydrophobic and dynamic analyzer tests developed composite’s adsorption storage and loss modulus with 10, 30, 50, 70, 90, and 110 thermal cycles under 18°C to 150°C. ASTM test standards evaluated the effect of the thermal cyclic process on mechanical properties. The composite contained 45 vol% basalt fiber with 90 thermal cycles and found higher adsorption storage modulus, elasticity, tensile strength, and flexural strength of 9200 GPa, 80 GPa, 229 MPa, and 398 MPa, respectively. The thermal adsorption loss modulus was limited by 12% on 90 thermal cycles at 150°C compared to 10 thermal cycles.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Influences of Various Thermal Cyclic Behaviours on Thermo Adsorption/Mechanical Characteristics of Epoxy Composite Enriched with Basalt Fiber

Karthikeyan¹,

Prabhu

Bhuvaneswari³

et al. 2023

Adsorption Science & Technology

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“…Moreover, the use of a rectangular twisted tape insert can increase the convective heat transfer coefficient by about 25%, compared with the smooth pipe. Natarajan et al 26 simulated heat transfer in a pipe using twisted tape insert. They observed that for laminar flow, the differences between CFD and experimental data were between 5% and 8% for friction factor and Nu , respectively.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the flow, pressure drop characteristics, and augmentation of heat performance in a 3D flow pipe based on different inserts of twisted tape configurations

Al‐Obaidi

2021

Heat Trans

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The flow behavior, pressure drop, and heat performance rate in the three‐dimensional pipe with and without inserted tape are analyzed in his study. The enhancement of thermohydraulic performance is carried out by increasing the twisted tape configurations with different Re. The numerical simulation model is validated with experimental data, where the outcomes indicate a good agreement between both data. The results revealed that the pressure drop across the pipe using twisted tape insert was higher than in a smooth pipe. The increased drop in pressure along the pipe enhanced the performance of heat transfer. In addition, there was a rise in fluid velocity, but it was nonuniform. This happened due to the swirl created through the inserted tape in the pipe. The comparative study also specified that the profiles of dynamic pressure, static pressure, velocity magnitude, and vorticity are nonuniform, compared with the smooth tube type. Moreover, the results found that the best improvement of heat transfer is at a low value of mass flow with a twisted tape of 1 × 3 mm, which is equal to approximately 27.7%, 26.5%, 26.4%, and 22.9% respectively. Furthermore, this study provides numerical investigations for engineering design on flow field analysis and enhanced heat transfer performance with different insert tape configurations.

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Investigation of heat exchanger tube fitted with triangular perforated nail head twisted‐tape inserts

Singh,

Kumar,

Kumar

2024

Heat Trans

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A numerical investigation of the Nusselt number, heat transfer augmentation efficiency, and friction factor in a laminar flow tube with triangular perforated nail head twisted tape (TPNHTT) is reported using ANSYS 19.2 Fluent. The effects of triangular cut (each side 3 mm) in the middle pitch of the tape along the height, diameter, and top diameter of the nail head (10, 2, and 2.5 mm, respectively) have been explored for (300 ≤ Re ≤ 1800) in a tube of 22 mm diameter. In this paper, implementation has been done with a TPNHTT varying width (14 ≤ b ≤ 20) twist ratio (TR) ranging from (3 ≤ TR ≤ 6), inserts in a tube for laminar flow. Twisted tape (TT) produces a swirl flow associated with fluid resulting in heat transfer enhancement and pressure drop characteristics other than that for the plain tube (PT). The performance of the Nusselt number and friction factor increased up to 123.62% and 495.30%, respectively, on the application of TPNHTT as compared with PT. A maximum thermal performance efficiency of 2.98 has been achieved using the twisted‐tape ratio of the current tube in laminar flow at a Reynolds number of 1700. In addition, correlation equations (11) and (12) have been developed for the friction factor and Nusselt number valid for 300 ≤ Re ≤ 1800, 14 ≤ b ≤ 20, and 3 ≤ TR ≤ 6. The study has proved that applying TT is an upgraded approach for laminar convection heat transfer. This novel work finding will be supportive for researchers to design the latest heat exchangers.

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CFD simulation of heat transfer enhancement in circular tube with twisted tape insert by using nanofluids

Cited by 18 publications

References 6 publications

Influences of Various Thermal Cyclic Behaviours on Thermo Adsorption/Mechanical Characteristics of Epoxy Composite Enriched with Basalt Fiber

Influences of Various Thermal Cyclic Behaviours on Thermo Adsorption/Mechanical Characteristics of Epoxy Composite Enriched with Basalt Fiber

Investigation of the flow, pressure drop characteristics, and augmentation of heat performance in a 3D flow pipe based on different inserts of twisted tape configurations

Investigation of heat exchanger tube fitted with triangular perforated nail head twisted‐tape inserts

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