Numerical study of fully developed flow and heat transfer in a wavy passage

Ramgadia, Abhishek G.; Saha, A.

doi:10.1016/j.ijthermalsci.2012.12.005

Cited by 55 publications

(15 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the published literature, it is found that the P À I is widely reported [11][12][13][14][15][16][17][18], QP À I is less reported [9,11,12], P À II is reported only by Guzman and Amon [11], and QP À II is probably reported here for the first time.…”

Section: Flow Transitions Guzman and Amonmentioning

confidence: 59%

“…The previous work on wavy channels has been done for two types of flow: developing [1][2][3][4][5][6][7][8][9] and periodically fully developed [10][11][12][13][14][15][16][17][18][19][20][21] flow. For developing flow, it is reported that the onset of unsteady flow occurs in the downstream section and propagates to upstream section with increasing Reynolds number.…”

Section: Introductionmentioning

confidence: 99%

“…They reported that model M2 produces the highest Nu and the best thermal performance factor (TPF); closely followed by M4. For model M4, they also studied [18] the effect of Reynolds number up to 2000.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fully-Developed Flow in a Furrowed Wavy Channel: Characterization of Unsteady Flow Regimes and Its Effect on Thermal-Hydraulic Performance

Sarkar

Sharma

2015

Numerical Heat Transfer, Part A: Applications

View full text Add to dashboard Cite

Numerical study is done at various Reynolds numbers , for periodically fully developed flow and heat transfer in five geometrically different wavy channels. Time signal analysis is done to distinguish various unsteady flow regimes and a flow regime map is proposed; demarcating steady, two types of periodic as well as quasi-periodic, and chaotic flow regimes. Temporal variation of flow structure and Nusselt number as well as friction factor are presented -in the various unsteady regimes -and discussed for a unified cause-and-effect study. Effect of different flow regimes on the thermal-hydraulic performance of wavy as compared to plane channel is presented. Effect of Prandtl numbers (0.01-100) is also studied.

show abstract

Section: Flow Transitions Guzman and Amonmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fully-Developed Flow in a Furrowed Wavy Channel: Characterization of Unsteady Flow Regimes and Its Effect on Thermal-Hydraulic Performance

Sarkar

Sharma

2015

Numerical Heat Transfer, Part A: Applications

View full text Add to dashboard Cite

show abstract

“…Thus, Reynolds number is an input governing parameter in the first but not in the second method; computed as an output parameter. A non-dimensional simulation -possible only in the first method -is non-linear such that the non-dimensional pressure needs to be computed iteratively [17], to achieve the desired mass flow rate at each time step. Furthermore, in the solution of non-dimensional energy equation, the non-dimensional temperature is linked with the bulk mean temperature in an iterative way [5].…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…Performance Factor (TPF) [17] and area goodness factor G, given as where j (= ) is Colburn j factor. Area goodness factor includes both the gain in terms of heat transfer and loss in terms of pressure drop.…”

Section: Flow and Heat Transfer Parametersmentioning

confidence: 99%

Periodically Fully Developed Heat and Fluid Flow Characteristics in a Furrowed Wavy Channel

Sarkar

Paramane

Sharma

2016

Heat Transfer Engineering

View full text Add to dashboard Cite

Periodically fully-developed 2D flow in a furrowed wavy channel is investigated numerically at various Reynolds numbers (100-2123). For the laminar and transitional flow regime, the study is done for six geometrically different channels; corresponding to various non-dimensional amplitude (0.05, 0.075 and 0.1) and wavelength (0.5 and 1). Critical Reynolds number -for the onset of periodic flow -decreases with increasing amplitude and wavelength. A flow regime map -demarcating steady and unsteady flow regime -is proposed. It is shown that the size of the vortex in streamlines and waviness in isotherms increases with increasing Reynolds number, amplitude and wavelength. The performance of wavy as compared to straight channel is studied with the help of ratio of Nusselt number, friction-factor and area-goodness-factor; and thermalperformance-factor. With increasing Reynolds number, all these parameters remain almost constant in the steady regime and increases almost linearly in the unsteady regime. For the largest Reynolds number (close to 2000) studied here, the increase in the Nusselt number ratiowithin the periodic flow regime -is 11.21% and 133% for the amplitude equal to 0.075 and 0.1, respectively, at a wavelength of 0.5; whereas, at a wavelength of 1.0 , the increase is 101% , 134% and 181% for the amplitude of 0.05 , 0.075 and 0.1, respectively.

show abstract

The role of microchannel geometry selection on heat transfer enhancement in heat sinks: A review

2021

View full text Add to dashboard Cite

Extensive research has been carried out by researchers for improving the thermal efficiency of the microchannel. There are various types of methodologies that have been proposed by authors for different geometry and fluid flow. The use of microchannel in the miniature heat exchangers and microchannel heat sink (MCHS) have taken the science of heat transfer to an another level for which the field of electronic device cooling, aerospace applications, automobile sectors, biomedical engineering, and chemical engineering sectors are being keen toward further development of the technology. Since 3 decades, the microchannel has been tested numerically, experimentally, and analytically for establishing the theories of hydraulic and thermal efficiency during fluid flow. Improper geometry selection of microchannel may lead to carry various losses such as pressure drop, friction factor, wall shear stress, and temperature jump. Available investigations and results have been reviewed immensely in this paper to give a clear prospective for further research in selecting a proper channel geometry.

show abstract

Numerical study of fully developed flow and heat transfer in a wavy passage

Cited by 55 publications

References 27 publications

Fully-Developed Flow in a Furrowed Wavy Channel: Characterization of Unsteady Flow Regimes and Its Effect on Thermal-Hydraulic Performance

Fully-Developed Flow in a Furrowed Wavy Channel: Characterization of Unsteady Flow Regimes and Its Effect on Thermal-Hydraulic Performance

Periodically Fully Developed Heat and Fluid Flow Characteristics in a Furrowed Wavy Channel

The role of microchannel geometry selection on heat transfer enhancement in heat sinks: A review

Contact Info

Product

Resources

About