<scp>CFD</scp> Simulation of Heat Transfer Augmentation in a Circular Tube Fitted with Alternative Axis Twisted Tape in Laminar Flow under a Constant Heat Flux

Salman, Sami D.; Kadhum, Abdul Amir H.; Takriff, Mohd Sobri; Mohamad, Abu Bakar

doi:10.1002/htj.21089

Cited by 17 publications

(13 citation statements)

References 20 publications

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“…In the work of Salman et al [25], it was discovered numerically that heat transfer in a plain tube can be enhanced by fitting an alternate-axis twisted tape or a plain twisted tape into the plain tube.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of heat transfer and fluid flow of water through a circular tube induced with divers' tape inserts

Oni

Paul

2016

Applied Thermal Engineering

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An investigation was carried out to analyse numerically heat transfer and flow characteristics of water through a circular tube induced with different twisted tapes. The aim is to know which of the tube designs gives the best performance when compared with a plain tube. Turbulent flow was considered, the walls of the tubes were under uniform wall heat flux, Reynolds number was between 5000 and 20000, and RNG κ-ε model was selected for the simulations. The shape of cuts on the tapes has effects on the performance of the induced tubes. The tube fitted with alternate-axis triangular cut twisted tape has the best performance as its Nusselt number and friction factor are 1.63 -2.18 and 2.60 -3.15 times respectively that of the tube fitted with plain twisted tape while its thermal performance factor is 1.35 -1.43 times that of the tube with plain twisted tape. New correlations were developed for the Nusselt number and friction factors, and reveal that the Nusselt number obtained from the new correlation agrees well with the correlation proposed by Thianpong et al. with a discrepancy of 2.21%. For the friction factor, the discrepancy is 3.01%.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of heat transfer and fluid flow of water through a circular tube induced with divers' tape inserts

Oni

Paul

2016

Applied Thermal Engineering

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“…Their results indicated that heat transfer coefficient significantly increased with decreasing cut depth. Salman et al [5] also studied the behaviors of heat transfer and friction factor in a tube equipped with twisted tape inserts with different alternative angles ( = 30 o , 60 o and 90 o ). For their studied range, heat transfer coefficient increased with increasing alternative angle.…”

Section: Introductionmentioning

confidence: 97%

Heat transfer enhancement by tapered twisted tape inserts

Piriyarungrod

Eiamsa-ard

Thianpong

et al. 2015

Chemical Engineering and Processing: Process Intensification

124

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“…Various researchers have performed the experiments on the thermal performance of various corrugated tubes with pitch ranges from 2 to 64 mm. Studies have also been done for the various diameter ratios range from 0.31 to 0.59.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on heat transfer and pressure drop characteristics in a smooth tube with different twisted tape inserts

Gugulothu

2019

Heat Trans. Asian Res.

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Experiments are performed to investigate the impact of inserts (TTI, TBI, and TBHI) accompanied by different twist ratios (ie, y/w = 3.69, 4.39, and 5.25) with uniform heat flux condition to study the performance characteristics of pressure drop, rate of heat flow, and heat transfer enhancement. Experiments were carried out on different twisted tape inserts in a turbulent flow regime by choosing suitable Reynolds number between 3100 and 39 000. A plain tube is tested and compared with the empirical correlations and are found to be in good agreement with the experimental data. In the case of twisted tape inserts stronger swirl flow is observed along the length of the tube. The variation of reduction in pressure along the length of tube and heat flux in the form of the friction factor and Nusselt number are represented graphically. Thermal performance factor tends to increase with a decrease in the taper twist ratio. The maximum enhancement in Nusselt number and friction factor was found to be in the case of TBI and TBHI. Experimental results are justified and are found to be reliable and accurate with the analytical results, with ±5% and ±4.2% deviation for Dittus‐Boelter and Petukhov correlation in the case of Nusselt number and ±7.2% deviation, respectively, for loss in the friction.

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CFD Simulation of Heat Transfer Augmentation in a Circular Tube Fitted with Alternative Axis Twisted Tape in Laminar Flow under a Constant Heat Flux

Cited by 17 publications

References 20 publications

Numerical investigation of heat transfer and fluid flow of water through a circular tube induced with divers' tape inserts

Numerical investigation of heat transfer and fluid flow of water through a circular tube induced with divers' tape inserts

Heat transfer enhancement by tapered twisted tape inserts

Experimental investigation on heat transfer and pressure drop characteristics in a smooth tube with different twisted tape inserts

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