Influence of Broken Twisted Tape on Heat Transfer Performance in Novel Axial Corrugated Tubes: Experimental and Numerical Study

Bhattacharyya, Suvanjan; Benim, Ali Cemal; Bennacer, Rachid; Dey, Koustav

doi:10.1080/01457632.2021.1875168

Cited by 12 publications

(12 citation statements)

References 62 publications

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“…Figure 1c shows the meshing of the geometry. In Figures 2 and 3, the results for Nu and f for the plain solar air heater tube from the current numerical analysis are compared with well-established correlations of Meyer et al [16] and Blasius [36], respectively. The current numerical estimates are in strong harmony with the results of the comparisons, according to both confirmation studies.…”

Section: Grid Independent Study and Validationmentioning

confidence: 96%

“…In the literature, there have been many laboratory experiments on heat augmentation techniques that utilize twisted tape as a passive technique [4][5][6][7][8][9][10][11]. Following this, the CFD modelling methodology was developed as a strong and useful method for better understanding complicated hydrodynamics [12][13][14][15][16][17][18] in many industrial processes, thanks to developments in computer hardware and software and the resulting increase in calculation speed.…”

Section: Introductionmentioning

confidence: 99%

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Parametric CFD Thermal Performance Analysis of Full, Medium, Half and Short Length Dimple Solar Air Tube

Alam

Souayeh

2021

Sustainability

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In the present decade, research regarding solar thermal air heaters (SAHs) has noticed a continuous progression in thermo-hydraulic performance augmentation approaches. There now exists a wide variety of thermo-hydraulic performance augmentation approaches and researchers have designated various structures. Nevertheless, there seems to be no generalization to any of the approaches employed. The present numerical investigation reports on the thermo-hydraulic characteristics and thermal performance for flow through a varied length (full, medium, half, and short length) dimple solar air heater (SAH) tube. The study highlights recent developments on enhanced tubes to augment heat transfer in SAH. The influence of different length ratio, dimple height ratio (H), and pitch ratio (s) on thermo-hydraulic characteristics have been investigated in the Reynolds number (Re) range from 5000 to 25,000. Air is used as the working fluid. The commercial software ANSYS Fluent is used for simulation. The shear stress transport (SST) model is used as the turbulence model. Thermal energy transport coefficient is increased in the full-length dimple tube (FLDT), compared to the medium-length dimple tube (MLDT), half-length dimple tube (HLDT) and short-length dimple tube (SLDT). Similarly, the pitch ratio (s) has more influence on Nusselt number (Nu) compared to the dimple height ratio (H). The friction factor decreases with an increase in pitch ratio. Nu increases and f decreases with increasing Re for all combinations of H and s. Low s and higher H yields high enhancement of HT and PD. Integration of artificial roughness on the tube increases the values of Nu and f by 5.12 times and 77.23 times for H = 0.07, s = 1.0 at Re value of 5000 and 25,000, respectively, in regard to the plain tube. For all the tested cases, the thermo-hydraulic performances (η) are greater than unity.

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Section: Grid Independent Study and Validationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Parametric CFD Thermal Performance Analysis of Full, Medium, Half and Short Length Dimple Solar Air Tube

Alam

Souayeh

2021

Sustainability

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“…Besides, different flow configurations have been studied [29][30][31][32][33][34]. Some papers recently considered the porous fin configuration's effect on the fluted tubes' performance [35][36][37][38]. Hojati et al [39] studied the heat transfer in the inclined groove tube and entropy generation in the spirally corrugated pipes [40] using refrigerant as a working fluid.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Pulsating Heat Transfer of Ferrofluid in Helically Fluted Tubes

Siricharoenpanitch¹,

Jongpleampiti²,

Naphon³

et al. 2022

MMEP

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The flow and heat transfer characteristics in the corrugated tube mainly depend on flow parameters and geometric configurations of the tube, such as corrugated cross-section, corrugated angle, corrugated arrangement, corrugated pitch and depth, pulsating flow frequency, coolant types, and Reynolds number. This paper presents the pulsating thermal characteristics of ferrofluid flowing in the fluted tube using the de-ionized water and 0.015% by volume as working fluid flowing in the test section. Eulerian two-phase turbulence model validation has been performed in both steady and pulsating flow. The finite volume approach discretizes the Eulerian two-phase model. Numerical results indicate that the longitudinal and transverse secondary flows are induced differently via the pulsating flow. The heat transfer characteristics of pulsating fluid flow are significantly larger than that of continuous fluid flow. A higher pulsating frequency induces a heat transfer enhancement. However, pulsating flow increases pressure due to more flow complexity and rough augmentation. Due to the disturbed fluid flow and higher swirling motion, the heat transfer augmentation increases and corresponds with the published results.

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“…They found application in power generation, chemical, bio-medical, refrigeration and air conditioning, automobile, aerospace industries, etc [1]. The performance of heat exchanger is determined on the basis of heat transfer coefficient and pressure drop [2][3][4]. It is always essential for a heat exchanger to give higher heat transfer coefficient while keeping the pressure drop low [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Computational investigation on heat transfer augmentation of a circular tube with novel hybrid ribs

et al. 2021

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Present study reports a computational investigation on heat transfer and pressure drop characteristics for flow through a heat exchanger tube fitted with novel hybrid ribs by using magnetic nanofluid (Fe3O4). Effects of different rib geometry on heat transfer and pressure drop characteristics have been investigated for Reynolds number ranging from 3 000 to 22 000. Until now, there is little information available in the literature on the method of quantifying the effect of forced convection on the heat transfer and pressure drop of hybrid rib (HR) inserts by using magnetic nanofluid (MNF). The transition SST models along with governing equations (continuity, momentum, and energy equations) are numerically solved with ANSYS Fluent 19.2. The simulation results are validated with established correlations and excellent agreement was found. Heat transfer coefficient is more in combined arrangement (HR and MNF) compared to acting alone arrangement (only MNF).

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Influence of Broken Twisted Tape on Heat Transfer Performance in Novel Axial Corrugated Tubes: Experimental and Numerical Study

Cited by 12 publications

References 62 publications

Parametric CFD Thermal Performance Analysis of Full, Medium, Half and Short Length Dimple Solar Air Tube

Parametric CFD Thermal Performance Analysis of Full, Medium, Half and Short Length Dimple Solar Air Tube

Numerical Analysis of the Pulsating Heat Transfer of Ferrofluid in Helically Fluted Tubes

Computational investigation on heat transfer augmentation of a circular tube with novel hybrid ribs

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