Heat transfer and friction factor characteristics of turbulent flow through a circular tube fitted with vortex generator inserts

Deshmukh, Prashant W.; Vedula, Rajendra P.

doi:10.1016/j.ijheatmasstransfer.2014.08.042

Cited by 60 publications

(21 citation statements)

References 10 publications

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“…on the tube with a vortex generator insert and results obtained using CFD software. The numerical values of the present study are closely matches with the experimental values reported by P. W. Deshmukh [1] et al In the graph on Y-axis ratio of Nusselt number for an augmented case with the smooth pipe case is taken. It is found that the vortex generator with e/d ratio=0.09, α=15° and for all the three p/pl ratios has the lowest Nusselt number enhancement.…”

Section: Resultssupporting

confidence: 88%

“…Fig. 12 shows experimental results obtained by P. W. Deshmukh [1] at el. on the tube with a vortex generator insert and results obtained using CFD software.…”

Section: Resultsmentioning

confidence: 99%

“…The passive technique uses various types of inserts which are reported in the literature survey. Deshmukh et al [1] studied the use of delta wing vortex generator as an insert in a tube. In this study effect of vortex generator on heat transfer performance is analyzed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heat Transfer Enhancement and Flow Physics Behavior of Fluid in Circular Tube with Insert

Deshmukh¹,

Deshmukh²,

Hatte³

2019

IJRTE

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The paper presents computational fluid dynamics study of non-conventional insert vortex generator using Commercial software, to analyze the effect of vortex generator insert on heat transfer augmentation and fluid flow behavior. The study was done for Reynolds number 10000, 15000, 25000, 35000 and 45000 with working fluid as air flowing through a tube with a constant heat flux of 1000 w/m2. Current study validates the experimental results from the literature study. The heat transfer of these inserts with various geometrical arrangements viz. pitch to projected length ratio, angle of attack and height to inner diameter ratio are investigated here with the help of computational fluid dynamics software. The physical mechanism of formation and development of vortex flow from the leading edge to trailing edge of the insert is studied and it is observed that Nusselt number increases as an increment in Reynolds number. The ratio of augmented Nusselt number to smooth tube Nusselt number is found to be decreasing with increase in Reynolds number.

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Section: Resultssupporting

confidence: 88%

“…Fig. 12 shows experimental results obtained by P. W. Deshmukh [1] at el. on the tube with a vortex generator insert and results obtained using CFD software.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Heat Transfer Enhancement and Flow Physics Behavior of Fluid in Circular Tube with Insert

Deshmukh¹,

Deshmukh²,

Hatte³

2019

IJRTE

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“…The device used in the present study is a modified version of the insert proposed by Deshmukh and Vedula [10]. The major difference being that the curved delta wing is made to extend from the wall to the centre of the tube which is necessary since the thermal boundary layer extends all the way to the centre of the tube in laminar flow.…”

mentioning

confidence: 99%

Heat transfer enhancement for laminar flow in tubes using curved delta wing vortex generator inserts

Deshmukh

Prabhu

Vedula

2016

Applied Thermal Engineering

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“…They found that the enhancement of the Nusselt number and friction loss are around 2 -25% and 4 -30%, respectively. Deshmukh and Vedula (2014) reported the influences of the projected length ratio, height to tube inner diameter ratio and flow attack angle of curved delta wing vortex generators inserted in a circular tube heat exchanger on thermal performance. They claimed that the Nusselt number for the tube heat exchanger with vortex generators is around 1.3 -5.0 times higher than the smooth tube with no vortex generators.…”

Section: Frontiers In Heat and Mass Transfermentioning

confidence: 99%

Influences of the Punched Delta Winglet Vortex Generators in a Circular Tube Heat Exchanger on Thermo-Hydraulic Performance

Jedsadaratanachai¹,

Boonloi²

2015

Frontiers in Heat and Mass Transfer

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Numerical investigations on flow topology, heat transfer behavior and thermal performance evaluation in a circular tube heat exchanger with the punched delta winglet vortex generators (PDWVG) inserted in the middle of the test section are presented. The effects of the flow attack angles that converging to the center of the tube; α = 0 o , 5 o , 10 o , 15 o , 20 o , 25 o , and flow directions; winglet tips pointing downstream and upstream, are investigated for the Reynolds numbers; Re = 100-2000. The finite volume method and SIMPLE algorithm are used for the current study. The results are presented in terms of flow configuration, heat transfer behavior and thermal performance assessments and also compared with the smooth tube with no PDWVG. As numerical results, the use of PDWVG inserted in the tube can help to improve heat transfer rate and thermal performance in the heat exchanger by creating the vortex flows through the test section. The rise of the flow attack angle and Reynolds number leads to increase in heat transfer, friction loss and thermal performance. The optimum TEF is around 2.33 at Re = 2000, α = 25 o for winglet tip pointing downstream.

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Heat transfer and friction factor characteristics of turbulent flow through a circular tube fitted with vortex generator inserts

Cited by 60 publications

References 10 publications

Heat Transfer Enhancement and Flow Physics Behavior of Fluid in Circular Tube with Insert

Heat Transfer Enhancement and Flow Physics Behavior of Fluid in Circular Tube with Insert

Heat transfer enhancement for laminar flow in tubes using curved delta wing vortex generator inserts

Influences of the Punched Delta Winglet Vortex Generators in a Circular Tube Heat Exchanger on Thermo-Hydraulic Performance

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