Heat transfer enhancement in a tube using circular cross sectional rings separated from wall

Özceyhan, Veysel; Gunes, Sibel; Büyükalaca, Orhan; Altuntop, Necdet

doi:10.1016/j.apenergy.2008.02.007

Cited by 92 publications

(26 citation statements)

References 33 publications

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“…They summarized that the enhancement of the heat transfer rate is around 57-195% higher than the baseline case. The heat transfer augmentations in the heat exchanger with conical-ring were presented Durmus, 2004;Eiamsa-ard and Promvonge, 2006a;2006b;Promvonge and Eiamsa-ard, 2007a;2007b;2007c;2007d;Kongkaitpaiboon et al, 2010a;Ozceyhan et al, 2008;Akansu, 2006;Kiml et al, 2003;2004;Kongkaitpaiboon et al, 2010b). The researchers concluded that the flow area has high effect for the increment of the pressure loss in the heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Flow and Heat Transfer Profiles in a Square Channel with 45? V-Downstream Orifices

Jedsadaratanachai¹,

Boonloi²

2016

Journal of Mathematics and Statistics

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Flow and heat transfer profiles in a square channel heat exchanger inserted with 45° V-orifices are presented. The influences of Reynolds number (Re = 3000-10,000) and blockage ratio (BR = 0.05, 0.10, 0.15, 0.20 and 0.25) on periodic concepts are investigated numerically. The computational domain is solved with the finite volume method and SIMPLE algorithm. As the numerical results, the periodic profiles on flow and heat transfer are found when inserted the 45° Vorifices in the square duct. The configurations on flow and heat transfer in the heating section can separated into two sections; periodic profile and fully developed periodic profile. The patterns on flow and heat transfer are similar, but the values are not equal, called "periodic profiles", while the identical on both profiles and values, called "fully developed periodic profiles". In addition, the periodic structures depends on the parameters of the vortex generator, position in the channel and Reynolds number.

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Section: Introductionmentioning

confidence: 99%

Flow and Heat Transfer Profiles in a Square Channel with 45? V-Downstream Orifices

Jedsadaratanachai¹,

Boonloi²

2016

Journal of Mathematics and Statistics

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“…Rush et al [2] studied on local heat transfer and flow behavior for laminar and transitional flow through sinusoidal wavy passages experimentally. Circular cross sectional rings with various spacing ratio for heat transfer augmentation and 18% overall improvement was found by Veysel et al [3]. To measure the local and average heat transfer co efficient in a corrugated wall, the naphthalene technique was applied by Goldstein and Sparrow [4].…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement and pumping power optimization using CuO-water nanofluid through rectangular corrugated pipe

Salehin

Ehsan

Islam

2017

AIP Conference Proceedings

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Abstract. Heat transfer enhancement by corrugation in fluid domain is a popular method. The rate of improvement is more when it is used highly thermal conductive fluid as heating or cooling medium. In this present study, heat transfer augmentation was investigated numerically by implementing corrugation in the fluid domain and nanofluid as the base fluid in the turbulent forced convection regime. Finite volume method (FVM) was applied to solve the continuity, momentum and energy equations. All the numerical simulations were considered for single phase flow. A rectangle corrugated pipe with 5000 W/m 2 constant heat flux subjected to the corrugated wall was considered as the fluid domain. In the range of Reynolds number 15000 to 40000, thermo-physical and hydrodynamic behavior was investigated by using CuO-water nanofluid from 1% to 5% volume fraction as the base fluid through the corrugated fluid domain. Corrugation justification was performed by changing the amplitude of the corrugation and the corrugation wave length for obtaining the increased heat transfer rate with minimum pumping power. For using CuO-water nanofluid, augmentation was also found more in the rectangle corrugated pipe both in heat transfer and pumping power requirement with the increase of Reynolds number and the volume fraction of nanofluid. For the increased pumping power, optimization of pumping power by using nanofluid was also performed for economic finding.Keywords: Heat transfer enhancement, Forced convection, Rectangular corrugation, Nanofluid, Pumping power.

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“…Adelaja et al [19] analyzed the conjugate heat transfer in a laminar tube flow with convective boundary conditions using the method of separation of variables for a thick walled cylindrical pipe. Ozceyhan et al [20] considered heat transfer enhancement with the addition of wings from the tube wall. Nonino et al [21] numerically studied the effects of axial wall heat conduction in micro-channels, aiming at clarifying the influences of geometrical parameters and wall thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Investigation on evaluation criteria of axial wall heat conduction under two classical thermal boundary conditions

2016

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Heat transfer enhancement in a tube using circular cross sectional rings separated from wall

Cited by 92 publications

References 33 publications

Flow and Heat Transfer Profiles in a Square Channel with 45? V-Downstream Orifices

Flow and Heat Transfer Profiles in a Square Channel with 45? V-Downstream Orifices

Heat transfer enhancement and pumping power optimization using CuO-water nanofluid through rectangular corrugated pipe

Investigation on evaluation criteria of axial wall heat conduction under two classical thermal boundary conditions

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