Flow and heat transfer characteristics in an annulus wrapped with a helical wire

Sreenivasulu, T.; Prasad, B. V. S. S. S.

doi:10.1016/j.ijthermalsci.2008.11.023

Cited by 45 publications

(15 citation statements)

References 13 publications

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“…Convective heat transfer for an annulus, having its inner cylinder wrapped with a helical wire, has been numerically studied by Sreenivasulu and Prasad [71]. They found that thermal hydraulic performance ratio for the wrapped wire annulus is considerably higher than unity.…”

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

confidence: 99%

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

Sheikholeslami

Gorji-Bandpy

Ganji

2015

Renewable and Sustainable Energy Reviews

419

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

confidence: 99%

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

Sheikholeslami

Gorji-Bandpy

Ganji

2015

Renewable and Sustainable Energy Reviews

419

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“…On the other hand, Table 2 presents a comprehensive review of fluid flow and heat transfer in Taylor-Couette-Poiseuille flow, where the axial flow is encountered in such applications. The listed work is ordered from recent to early papers within three categories, namely fluid flow work, [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] forced convection heat transfer work for concentric, 1,[40][41][42][43][44][45][46][47][48] and eccentric [49][50][51][52][53][54][55][56][57][58] annuli. The fluid flow work, reported in Table 2, indicated that the topic receives a major consideration in the literature.…”

Section: Introductionmentioning

confidence: 99%

Fluid flow and convection heat transfer in concentric and eccentric cylindrical annuli of different radii ratios for Taylor-Couette-Poiseuille flow

Abou-Ziyan

Ameen

Elsayed

2021

Advances in Mechanical Engineering

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This paper presents the results of fluid flow and convection heat transfer in concentric and eccentric annuli between two cylinders using a three-dimensional computational fluid dynamics model. Effects of rotational speed ( n = 0, 150, 300, and 400 rpm) and eccentricity (ε = 0, 0.15, 0.3, 0.45, and 0.6) on axial and tangential velocity distribution, pressure drop and forced convection heat transfer are investigated for radii ratios (η) of 0.2, 0.4, 0.6, and 0.8, Reynolds number 2.0 × 103–1.236 × 105, Taylor number 1.47 × 106–1.6 × 1010, and Prandtl number 3.71–6.94. The parameters cover many applications, including rotary heat exchangers, mixers, agitators, etc. Nusselt numbers and friction factors for stationary and rotated concentric and eccentric annuli are correlated with four dimensionless numbers. The results revealed that when the speed of the inner cylinder increases from 0 to 400 rpm, the friction factor increases by 7.7%–103% for concentric and 8.2%–148% for eccentric annuli, whereas Nusselt number enhances by 37%–333% for concentric and 44%–340% for eccentric annuli. The radius ratio has a substantial effect on the heat transfer and pressure drop in annuli. The eccentricity enhances the heat transfer up to 12%, whereas its effect on the friction factor is not monotonic as it depends on Reynolds number, radii ratios, and rotational speed.

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“…Sivashanmugam and Suresh [8] reported heat transfer and friction factor characteristics of turbulent flow through a circular tube fitted with regularly spaced helical screw-tape inserts. Sreenivasulu and Prasad [10] numerically studied the convective heat transfer for an annulus with inner cylinder wrapped with a helical wire. They all reported that the presence of wire coils together with twisted tape leads to a double increase in heat transfer over the use of wire coil/twisted tape alone.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies on effect of bonding the twisted tape with pins to the inner surface of the circular tube

Selvam¹,

Thiyagarajan²,

Suresh

2014

THERM SCI

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Heat transfer and friction factor characteristics are studied for water flowing through the tube in tube heat exchanger for two different configurations, namely,(1) twisted tape with pins and (2) twisted tape with pins bonded to the inner surface of the test section. Experiments are carried out for different twist pitch to the width of the twisted tape ratios (y/w) for both configurations. But very few research works have been done based on the mentioned heat transfer enhancement techniques. This paper presents the effect of twisted tape with pins on the heat transfer for a fully developed turbulent flow. Experiments are conducted by maintaining constant wall temperature. The heat transfer rate and pressure drop is found to be high for configuration (2) of y/w=3.33 when compared to all other configurations. The empirical correlations developed for different twisted tape with pins results in ±7.28% deviation for Nusselt number and ±7.16% for friction factor.

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Flow and heat transfer characteristics in an annulus wrapped with a helical wire

Cited by 45 publications

References 13 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

Fluid flow and convection heat transfer in concentric and eccentric cylindrical annuli of different radii ratios for Taylor-Couette-Poiseuille flow

Experimental studies on effect of bonding the twisted tape with pins to the inner surface of the circular tube

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