Emerging Applications of Microchannels

Ohadi, Michael M.; Choo, Kyosung; Dessiatoun, Serguei; Cetegen, Edvin

doi:10.1007/978-1-4614-0779-9_3

Cited by 9 publications

(10 citation statements)

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“…Ceramic materials offer potentially significant advantages compared to metal alternatives, including significantly higher operating temperatures, improved tolerance of harsh chemical environments, improved bonding with ceramic-based catalyst and significant cost savings in Fig. 43 Typical dimensions of a triangular microchannel for compact heat exchanger applications [198] Fig. 44 View of a microchannel heat exchanger [198] materials and manufacturing methods.…”

Section: Automotive and Aerospacementioning

confidence: 99%

“…Fig. 42 Typical dimensions of a rectangular microchannel for compact heat exchanger applications [198] Car radiators employ a cross flow design that allows a sufficient mass flow rate of air through the radiator while using only the stagnation pressure associated with the motion of the automobile. The common measure of performance for car radiators is the heat transfer/frontal area normalized by the difference in inlet temperatures of the coolant (water-glycol) and the air.…”

Section: Automotive and Aerospacementioning

confidence: 99%

“…43 Typical dimensions of a triangular microchannel for compact heat exchanger applications [198] Fig. 44 View of a microchannel heat exchanger [198] materials and manufacturing methods. Although there are numerous possible applications, the effort reported here is motivated by the need for low-cost, high-performance fuel reformers, and the need to effectively integrate unit processes in solid-oxide fuel cell systems.…”

Section: Automotive and Aerospacementioning

confidence: 99%

“…The advantages of microchannel heat exchangers include high volumetric heat flux, compactness for space-critical applications, robust design, effective flow distribution, and modest pressure drops. This section will cover selected industrial examples for microchannel heat exchangers, microchannel heat pipes, and microchannel heat plates [198].…”

Section: Micro-channels Applications and Fabricationmentioning

confidence: 99%

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Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Advanced Structured Materials

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Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The flipside of LBM is the existence of universal problems associated with its thermal ablation mechanism. In order to alleviate or reduce the inherent problems of LBM, a massive research has been done during the past decade and in turn build a relatively new route of laser-hybrid processes. The hybrid approaches in laser ablation have demonstrated much improved results in terms of material removal rate, surface integrity, geometrical tolerances, thermal damage, metallurgical alterations and many more. This chapter reviews the research work carried out so far in the area of LBM and its hybrid processes for different materials and shapes.

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Section: Automotive and Aerospacementioning

confidence: 99%

Section: Automotive and Aerospacementioning

confidence: 99%

Section: Automotive and Aerospacementioning

confidence: 99%

Section: Micro-channels Applications and Fabricationmentioning

confidence: 99%

See 2 more Smart Citations

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Advanced Structured Materials

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“…This section will cover selected industrial examples for microchannel heat exchangers, microchannel heat pipes, and microchannel heat plates [198]. The advantages of microchannel heat exchangers include high volumetric heat flux, compactness for space-critical applications, robust design, effective flow distribution, and modest pressure drops.…”

Section: Micro-channels Applications and Fabricationmentioning

confidence: 99%

Machining, Joining and Modifications of Advanced Materials

Öchsner¹,

Altenbach²

2016

Advanced Structured Materials

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Exploring the fabrication limits of thin-wall structures in a laser powder bed fusion process

Narra

Rollett

2020

Int J Adv Manuf Technol

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Although additive manufacturing (AM) is becoming increasingly popular for various applications, few studies have addressed design and potential problems in thin wall fabrication for the laser powder bed fusion (LPBF) process. In the LPBF process, rapid cooling induces thermal shrinkage, which in turn, results in high residual stress and complicates thin wall fabrication. The minimum wall thickness is limited by the parameters and machine settings while the dimensional accuracy is controlled by the powder size, scan strategy, and part geometry. The ability to fabricate thin-wall components is important for applications such as heat exchangers (HX). This study explores the performance of the LPBF process by fabricating thin walls with extreme geometries in different processing conditions and alloys using an EOS M290 LPBF machine. Results show that the material, part design, and scanning strategy contribute to the variation in thin wall dimensions. A maximum inclination angle of 60°and a minimum wall thickness of1 00 μm in Ti-6Al-4V, Inconel 718, and AlSi10Mg were achieved using optimized part design and processing conditions. The effects of part design and material on the thermal distortion and surface finish of thin walls were also investigated leading to a discussion on how the scan mode assigned by the EOS software affects design and fabrication. Additionally, synchrotron-based X-ray micro-tomography (μSXCT) was utilized to quantify the porosity in thin-wall structures and to correlate it with the integrity of the structures. Comprehensive design guidelines presented in this work can increase the success rate of fabricating thin-wall geometries. Keywords Additive manufacturing (AM). Laser powder bed fusion (LPBF). Thin wall. Design guidelines. Porosity. X-ray computed tomography (XCT) Abbreviations AM Additive manufacturing LPBF Laser powder bed fusion μSXCT Synchrotron-based X-ray micro-tomography CAD Computer-aided design μHX Micro-heat exchanger XCT X-ray computed tomography EDM Electrical discharge machining APS Advanced Photon Source

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Emerging Applications of Microchannels

Cited by 9 publications

References 0 publications

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Machining, Joining and Modifications of Advanced Materials

Exploring the fabrication limits of thin-wall structures in a laser powder bed fusion process

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