The pulsating laminar flow in a rectangular channel

Valueva, E. P.; Purdin, M. S.

doi:10.1134/s0869864315060098

Cited by 19 publications

(4 citation statements)

References 19 publications

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“…Tariq et al performed experimental and numerical studies to investigate the thermal performance of cellular structures using air [18], water [19], and nanofluids [20]. Valueva and Purdin [21] numerically investigated the effect of aspect ratio of a rectangular channel on pulsating flow dynamics. Valueva and Purdin [22] developed a numerical model for the heat exchange between stationary and pulsating laminar flow inside a rectangular channel.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Investigation of Slotted Fin Minichannel Heat Sink for Microprocessor Cooling

et al. 2021

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Due to high heat flux generation inside microprocessors, water-cooled heat sinks have gained special attention. For the durability of the microprocessor, this generated flux should be effectively removed. The effective thermal management of high-processing devices is now becoming popular due to high heat flux generation. Heat removal plays a significant role in the longer operation and better performance of heat sinks. In this work, to tackle the heat generation issues, a slotted fin minichannel heat sink (SFMCHS) was investigated by modifying a conventional straight integral fin minichannel heat sink (SIFMCHS). SFMCHSs with fin spacings of 0.5 mm, 1 mm, and 1.5 mm were numerically studied. The numerical results were then compared with SIFMCHSs present in the literature. The base temperatures recorded for two slots per fin minichannel heat sink (SPFMCHS), with 0.5 mm, 1 mm, and 1.5 mm fin spacings, were 42.81 °C, 46.36 °C, and 48.86 °C, respectively, at 1 LPM. The reductions in base temperature achieved with two SPFMCHSs were 9.20 %, 8.74 %, and 7.39% for 0.5 mm, 1 mm, and 1.5 mm fin spacings, respectively, as compared to SIFMCHSs reported in the literature. The reductions in base temperature noted for three SPFMCHSs were 8.53%, 9.05%, and 5.95% for 0.5 mm, 1 mm, and 1.5 mm fin spacings, respectively, at 1 LPM, as compared to SIFMCHSs reported in the literature. In terms of heat transfer performance, the base temperature and thermal resistance of the 0.5 mm-spaced SPFMCHS is better compared to 1 mm and 1.5 mm fin spacings. The uniform temperature distribution at the base of the heat sink was observed in all cases solved in current work.

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Section: Introductionmentioning

confidence: 99%

Thermal Performance Investigation of Slotted Fin Minichannel Heat Sink for Microprocessor Cooling

et al. 2021

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“…The literature survey revealed that, although many researchers have investigated the entrance effects in different types of steady flows, 25–33 and even pulsatile ones, 34–38 the proven available data for the development length of purely oscillatory flows are poor and limited.…”

Section: Introductionmentioning

confidence: 99%

Entrance length of oscillatory flows in parallel plate microchannels

Shajari

Abbasi

Jamei

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper presents the numerical investigation of the purely oscillatory laminar flows of incompressible Newtonian fluids, in the entrance region of parallel plate microchannels. Development of the axial velocity profiles and the required entrance length were studied in the low Reynolds number regime (20[Formula: see text] 200) and for the low dimensionless oscillation frequency or the Stokes number (1.08 [Formula: see text] 2.80), which is applicable particularly for microchannel flows. To obtain more realistic and applicable results, the time-dependent parabolic entry conditions were considered for all simulations. The results show that for ([Formula: see text]1.53), the entrance length can be estimated by the steady-state results for corresponding inlet velocity profiles, while for the (1.53 [Formula: see text] 2.80), the deviation from the steady-state condition occurs for the entrance length. Further, according to the obtained numerical data, in this work, a useful correlation is proposed to predict the entrance length for the studied ranges of the purely oscillatory flows through the parallel plate microchannels.

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“…Valueva and Purdin (2015) developed a pulsating laminar flow in a rectangular channel. They analyzed the effect of the aspect ratio of the rectangular channel sides channel on the pulsating flow.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of heat transfer of laminar and turbulent pulsating Al₂O₃/water nanofluid flow

Hoseinzadeh

Heyns

Kariman

2019

HFF

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Purpose The purpose of this paper is to investigate the heat transfer of laminar and turbulent pulsating Al203/water nanofluid flow in a two-dimensional channel. In the laminar flow range, with increasing Reynolds number (Re), the velocity gradient is increased. Also, the Nusselt number (Nu) is increased, which causes increase in the overall heat transfer rate. Additionally, in the change of flow regime from laminar to turbulent, average thermal flux and pulsation range are increased. Also, the effect of different percentage of Al2O3/water nanofluid is investigated. The results show that the addition of nanofluids improve thermal performance in channel, but the using of nanofluid causes a pressure drop in the channel. Design/methodology/approach The pulsatile flow and heat transfer in a two-dimensional channel were investigated. Findings The numerical results show that the Al2O3/Water nanofluid has a significant effect on the thermal properties of the different flows (laminar and turbulent) and the average thermal flux and pulsation ranges are increased in the change of flow regime from laminar to turbulent. Also, the addition of nanofluid improves thermal performance in channels. Originality/value The originality of this work lies in proposing a numerical analysis of heat transfer of pulsating Al2O3/Water nanofluid flow -with different percentages- in the two-dimensional channel while the flow regime change from laminar to turbulent.

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The pulsating laminar flow in a rectangular channel

Cited by 19 publications

References 19 publications

Thermal Performance Investigation of Slotted Fin Minichannel Heat Sink for Microprocessor Cooling

Thermal Performance Investigation of Slotted Fin Minichannel Heat Sink for Microprocessor Cooling

Entrance length of oscillatory flows in parallel plate microchannels

Numerical investigation of heat transfer of laminar and turbulent pulsating Al₂O₃/water nanofluid flow

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The pulsating laminar flow in a rectangular channel

Cited by 19 publications

References 19 publications

Thermal Performance Investigation of Slotted Fin Minichannel Heat Sink for Microprocessor Cooling

Thermal Performance Investigation of Slotted Fin Minichannel Heat Sink for Microprocessor Cooling

Entrance length of oscillatory flows in parallel plate microchannels

Numerical investigation of heat transfer of laminar and turbulent pulsating Al2O3/water nanofluid flow

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Numerical investigation of heat transfer of laminar and turbulent pulsating Al₂O₃/water nanofluid flow