Heat transfer and flow characteristics of microchannels with solid and porous ribs

Li, Fei; Ma, Qingming; Xin, Gongming; Zhang, Jingchao; Wang, Xinyu

doi:10.1016/j.applthermaleng.2020.115639

Cited by 75 publications

(20 citation statements)

References 70 publications

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“…Step 4: solve all other discretised transport equation 2 Modelling and Simulation in Engineering et al [13] studied the heat transfer potentiality and flow features in a microchannel with solid and porous ribs. They found that the thermal performance in the microchannel installed with the rib is greater than plain section with no rib.…”

Section: Startmentioning

confidence: 99%

Heat Transfer Potentiality and Flow Behavior in a Square Duct Fitted with Double-Inclined Baffles: A Numerical Analysis

Boonloi

Jedsadaratanachai

2021

Modelling and Simulation in Engineering

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Numerical analysis of heat transfer mechanisms and flow topologies for the heat exchanger square channel (HESC) installed with the double-inclined baffles (DIB) is reported. The main objective of the present research is to study the influences of DIB height to duct height ( b / H = 0.05 – 0.30 ), DIB distance to duct height ( P / H = 1 – 1.5 ), and flow attack angle ( α = 30 ° and 45 ° ) on the flow topologies, heat transfer features, and thermal performances. The Reynolds numbers (based on the entry HESC around 100–2000) are analyzed for the present problem. The numerical models of the HESC installed with the DIB are solved with finite volume method (commercial code). The simulated results of the HESC installed with the DIB are reported in forms of flow topologies and heat transfer characteristics. The Nusselt numbers (Nu), friction factors ( f ), and thermal enhancement factors (TEF) of the HESC placed with the DIB are offered. As the numerical results, it is seen that the DIB produces the vortex streams and impinging streams in all cases. The vortex streams and impinging streams disturb the thermal boundary layer on the HESC walls that is a key motive for the growth of heat transfer rate. The best TEF of the HESC installed with the DIB is about 3.87 at P / H = 1 , α = 30 ° , Re = 2000 , and b / H = 0.15 . Additionally, the TEF contours, which help to design the HESC inserted with the DIB, are performed.

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Section: Startmentioning

confidence: 99%

Heat Transfer Potentiality and Flow Behavior in a Square Duct Fitted with Double-Inclined Baffles: A Numerical Analysis

Boonloi

Jedsadaratanachai

2021

Modelling and Simulation in Engineering

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“…According to Eqs. (10) and (11) [42], the thermal conductivity of the battery in the x-, y-, and z-coordinate was calculated.…”

Section: Equivalent Thermal Conductivity Of Li-ion Batteriesmentioning

confidence: 99%

“…Results show that at a constant Reynolds number the heat transfer and friction coefficient were enhanced by increasing the in/out ratio. Li et al 11 used numerical methods to comprehensively investigate the heat transfer and flow characteristics of microchannels with solid and porous ribs and found that the thermal performance of the microchannel with solid and porous ribs is better than those without any ribs.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Manifold Microchannel Heat Sinks for Thermal Management in a Li‐Ion Battery

Pan

2020

Chem Eng & Technol

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The microchannel heat sink is an effective technology for the thermal management of Li-ion batteries. The overall performance of two heat sinks with improved thermal management of Li-ion batteries was determined by a numerical simulation model. A manifold microchannel heat sink (MMC) and a traditional microchannel heat sink (TMC) with different aspect ratios of microchannels were developed. Thermal transfer performance and pressure drop characteristics of two heat sinks were compared by Fluent. Results indicate that the temperature uniformity of the TMC is worse than that of the MMC. The total pressure drop of TMC is significantly higher as compared to that of the MMC. Consequently, the MMC has a better overall performance than the TMC.

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“…The enhancement of their efficiency remains still of great concern for engineers and users. One of the most effective ways for an important heat exchange (HE) within a smooth airway, such as cooling or heating solar ducts, with lower high flow rates, is the use of attached (Kadari et al, 2018) or detached (Kaewkohkiat et al, 2017), transverse (Hosseinirad et al, 2019) or longitudinal (Wang et al, 2019), orthogonal (Karmakar & Mohanty, 2019) or inclined (Phila et al, 2020), solid (Li et al, 2020a), slotted (Alfellag et al, 2020), perforated (Liu et al, 2019) or porous (Davari & Maerefat, 2016), and simple (Hanna et al, 2002), corrugated (Gholami et al, 2019) or shaped (Menni et al, CONTACT Mohsen Sharifpur mohsensharifpur@duytan.edu.vn; mohsen.sharifpur@up.ac.za; Mohammad Hossein Ahmadi mohammadhosein.ahmadi@gmail.com 2020a) type inserts, known as vortex generators (VGs), turbulators, turbulence promoters, or deflectors (Awais & Bhuiyan, 2018;Huang et al, 2018), such as ribs, baffles, or fins (Ameur, 2019;Boukhadia et al, 2018), placed in parallel, in-line, or staggered arrays (Lee et al, 2018). These vortex generators are utilized to lengthen the trajectory of the fluid particles and to increase the interaction between them, which generates improved thermal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Effects of in-line deflectors on the overall performance of a channel heat exchanger

Menni

Ameur²,

Sharifpur

et al. 2021

Engineering Applications of Computational Fluid Mechanics

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The turbulent convective thermal transfer in channel heat exchangers (CHEs) is studied numerically via the CFD (Computational Fluid Dynamics) method. Deflectors are inserted on the hot bottom walls of the heat channel to enhance the hydrothermal characteristics. Various shapes of in-line deflectors are considered, namely: rectangular (a/b = 0.00), cascaded rectangular-triangular (a/b = 0.25, 0.50, and 0.75), and triangular (a/b = 1.00) shapes. From the obtained results, the inclusion of in-line deflectors with a/b = 0.75 has given the most significant thermal enhancement factor, which was higher than that for a/b = 0.00, 0.25, 0.50, and 1.00 by about 5.36, 5.06, 67.27, and 3.88%, respectively. Also, the in-line cascaded deflector' case (a/b = 0.75) shows an increase in the enhancement factor (η) from 4 to 15.

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Heat transfer and flow characteristics of microchannels with solid and porous ribs

Cited by 75 publications

References 70 publications

Heat Transfer Potentiality and Flow Behavior in a Square Duct Fitted with Double-Inclined Baffles: A Numerical Analysis

Heat Transfer Potentiality and Flow Behavior in a Square Duct Fitted with Double-Inclined Baffles: A Numerical Analysis

Numerical Simulation of Manifold Microchannel Heat Sinks for Thermal Management in a Li‐Ion Battery

Effects of in-line deflectors on the overall performance of a channel heat exchanger

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