Effect of Porous Medium Positioning on Heat Transfer of Micro-channel with Jet

Alibeigi, Mahdi; Farahani, Somayeh Davoodabadi

doi:10.5829/ije.2020.33.10a.24

Cited by 4 publications

(4 citation statements)

References 22 publications

(26 reference statements)

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“…In this case, the usage effect of PCM in porous medium a two-dimensional micro-channel on dimensionless heat transfer number which named Nusselt number is investigated. To verify of this numeric correlation has validated with the same literature, which has done in 2020 by Alibeigi and Farahani [3] this analogy reproved of the numerical analyses in this scope, the consequences for the case where the Reynolds number is 100 and illustrated in Fig.5. At this point is a moral match between the results of the present study and the reference and there is less than 10% difference.…”

Section: Resultsmentioning

confidence: 65%

“…Thermophysical properties of porous material and RT-44 as PCM material. [3,23] Porous material thermophysics properties PCM thermophysics properties…”

Section: Methodsmentioning

confidence: 99%

“…In recent decades, study of micro-channel intends many researchers cause of tremendous heat transfer effects and microfluidic attends by adding nano-fluid, porous-medium or a new material with the immense enhanced heat transfer, which is practical applying in devices as biological and chemical detections, drug delivery, and micro-mixing, also it can be used as a heat exchanger in the instruments such as heat sinks, steam methane reforming reactor reactors, nanoelectromechanical systems(NEMS)-based, microelectromechanical systems(MEMS) ,MHD areas and plate-pin heat exchanger. [1][2][3][4] scaling up microchannel process technology to commercial-scale is important which Focusing on and solving challenges around device fabrication, flow distribution and catalyst integration are the keys to success where Manufacturing steps demonstrated, including completion of a one eighth commercial-scale SMR reactor block. [ 5 ] demonstrated analysis NEMS-based and MEMS-based SMR devices provided extremely high sensitivity, sufficient to access new and interesting regimes for bio detection [ 6 ] .…”

Section: Introduction 1 Hmentioning

confidence: 99%

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Effect of using RT-44 as phase-change material in the porous microchannel

Alibeigi

Sabzeali

2021

Preprint

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In this paper, the influence of the utilizing RT-44 which, knows as a phase-change material (PCM) has used in an overall porous layer channel or optional additive nano particle of water/ZnO with three injecting fluid from its lower wall is investigated. The boundary condition slip-walls for the lower and higher walls of the micro-channel as insulation and constant temperature is considered. respectively, for assessment of PCM and nanoparticles consequences, the volume fraction of 0,2% and 5% determined for both of nanofluid and PCM. The result show that the Nusselt number increased with adding PCM to the porous media and decreasing with adding nanoparticles. When volume fraction of nano fluid is 5% the relative Nusselt number was calculated for PCM volume fraction of 1%,2% and 5% with amount of \(N{u^*}=0.9607\),\(N{u^*}=0.9710\)and\(N{u^*}=0.9869\).respectively, for more supplementary the microchannel has levelized in two stage and three stage. The bulk temperature calculated for three stages for each level, at first stage was 299.90 K, at second stage was 302.38 K and 302.72 K at third stage. For considering the geometric parameters effect an optimization with monte Carlo(MC) method has been simulated in terms of maximizing Nusselt number ,it approved the relative Nusselt number Nusselt 1.026 and it increasing 0.26 K at the end of micro channel. Finally, the Additive PCM to porous material purposed for heating and additive nanofluid to the porous media purposed for cooling as well, the multistage channel purposed for heating at the latest stage.

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Section: Resultsmentioning

confidence: 65%

“…Thermophysical properties of porous material and RT-44 as PCM material. [3,23] Porous material thermophysics properties PCM thermophysics properties…”

Section: Methodsmentioning

confidence: 99%

Section: Introduction 1 Hmentioning

confidence: 99%

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Effect of using RT-44 as phase-change material in the porous microchannel

Alibeigi

Sabzeali

2021

Preprint

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“…In recent study, Jalili et al (26) examined the flow of a viscous fluid between porous disks under a magnetic field, comparing Akbari-Ganji Method (AGM) and the Finite Element Method (FEM). Valuable research has been conducted in the fields of microchannels, nanofluids, and heat transfer, which are reportd in literature (27)(28)(29)(30)(31)(32) and can be beneficial for future studies.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Heat Transfer in Microchannel Heat Sinks: A Numerical Investigation with Nanofluids and Modified Geometries

Nasiri Khamesloo,

Domiri Ganji

2024

IJE

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The utilization of microchannel heat sinks stands as one of the most reliable solutions for dissipating heat generated in electronic chips. In this numerical study, a fractal microchannel heat sink employing three nanofluids Cu-water, Al2O3-water, and TiO2-water with variable volume fractions of 2 and 4 percent as the cooling fluid within the microchannels was investigated. The fluid flow inside the microchannels was analyzed from both hydrodynamic and thermal perspectives. The parameters such as pump power, Nusselt number, and performance evaluation criterion (PEC) were studied. Results demonstrate that heat transfer increases with an increase in the flow rate and volume fraction of nanoparticles. The maximum temperature reduction for the Cu-water nanofluid at an inlet flow rate of 200 ml/min and a volume fraction of 4% is 2.41%, the highest among the investigated nanofluids. However, this nanofluid also exhibits the highest pressure drop, reaching 25% at a 4% volume fraction. The PEC number analysis reveals an overall performance increase for all three microchannels. The Cuwater nanofluid exhibits the best comprehensive performance, providing an 8% overall enhancement, followed by Al2O3-water and TiO2-water nanofluids, which increase the system performance by 5% and 4%, respectively. Furthermore, the study introduced fins and cavities to the microchannel branches to enhance heat transfer and overall performance. Results indicate an increase in heat transfer for both modified geometries. The microchannel with fins exhibits a 3.5% lower maximum temperature compared to the original geometry at an inlet flow rate of 200 ml/min, while the microchannel with cavities showed a 1% reduction. However, the microchannel with fins experiences a 400% higher pressure drop than the initial geometry, while the microchannel with cavities has a 4% increase. PEC number analysis demonstrated that the microchannel with cavities improves system performance by 8%, whereas the microchannel with fins reduced system performance by 4%.

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