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51 articles for “microchannels”
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Short Experimental Report on Lithographic Technique in Microfluidics
Abstract: In this experimental work, a single SU-8 based glass microfluidic device is fabricated by the maskless lithography and indirect bonding technique. The sealing by indirect bonding technique is perform during the hard baking in maskless lithography. Dyed ethylene glycol is prepared as the working liquid. A CMOS camera catching 25 frames per second with a corresponding time-scale resolution of 0.04 second is used to record the surface-driven microfluidic flow of …
Published in Journal of Microwave Engineering and Technologies · Vol. 8, Issue 3, 2021 · pp. 1–5 Read article
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Short Report on Polymer Based Automated Fluid Machines for Applications in Microfluidics
Abstract: In this experimental work, a couple of gradual expansion microchannels are fabricated by polymethylmethacrylate (PMMA) using the maskless lithography, hot embossing lithography and direct bonding technique. Dyed ethylene glycol and dyed water are the prepared working liquids. The CMOS camera catching 25 frames per second with a corresponding time-scale resolution of 0.04 second is used to record each surface-driven microfluidic flow of dyed ethylene glycol and dyed water in the …
Published in Journal of Materials & Metallurgical Engineering · Vol. 11, Issue 2, 2021 · pp. 23–28 Read article
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Aspects of Diamond-Like Carbon based MEMS and Microfluidic Devices
Abstract: In general, diamond-like carbon (DLC) is the hydrogenated amorphous carbon (a-C:H) to be used in the fabrication of micro electromechanical systems (MEMS) and microfluidic devices. Mukhopadhyay as author has recently demonstrated the variation of surface wettability in polymer based microchannels by the use of DLC. Also, DLC can be used as an anti-stiction coating in different applications. In this review, different features of DLC are briefly highlighted. This educational short …
Published in Journal of Petroleum Engineering & Technology · Vol. 8, Issue 1, 2018 · pp. 31–33 Read article
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Surface-Driven Capillary Flow of the Dyed Aqueous Ethanol in a single SU-8 based Glass Microfluidic Device integrated with the Arrays of Square Polyimide Micropillars
Abstract: In this work, a single SU-8 based glass microfluidic device is fabricated by the maskless lithography and indirect bonding technique. A particular polyimide layer at the selected portions and the arrays of square polyimide micropillars at the other portions are integrated on the microchannel bottom wall by the maskless lithography. Dyed aqueous ethanol (70% dyed water, 30% ethanol) is prepared as the working liquid in this work. A CMOS camera …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 6, Issue 1, 2019 · pp. 33–37 Read article
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Educational Research Review on the Engineering of Droplet based Microfluidics
Abstract: AbstractDroplet based microfluidics as a subject is interdisciplinary among materials science, biochemistry and microengineering, having the wide range of applications from advanced materials to biomedical sciences. Control on droplet volumes and manipulation result into coalescence, mixing and sorting for chemical reactions inside droplets under specific experimental conditions. Surface properties and geometry of the fluidic microchannels are the important factors of droplet generation. This comprehensive review on droplet based microfluidics is …
Published in Recent Trends in Fluid Mechanics · Vol. 4, Issue 3, 2017 · pp. 9–13 Read article
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Experimental Studies on the Surface-Driven Capillary Flow of Dyed Water in Multistage Microfluidic Bends
Abstract: AbstractA single three-stage and a pair of two-stage microfluidic bends are fabricated. SU-8 as negative photoresist is used to fabricate the stamp by maskless lithography and diamond like carbon (DLC) coating. Microchannel structures are fabricated using polymethylmethacrylate (PMMA) by hot embossing lithography. Direct bonding technique is used to fabricate the leakage-free sealing in microfluidic bends. The leakage-free surface-driven capillary flow is recorded by CMOS camera. This work will be useful …
Published in Recent Trends in Fluid Mechanics · Vol. 4, Issue 3, 2017 · pp. 29–34 Read article
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Short Review on the Effects of Plasma Processing Techniques in PMMA Microfluidic Device
Abstract: Abstract: The plasma processing techniques are useful for surface modifications on polymer surfaces. The appropriate surface modification alters the level of static contact angles on the polymer surfaces. The surface-driven microfluidic flow of suitable working liquid is sensitive to the static contact angle of microchannel surfaces fabricated by different polymers. Therefore, plasma processing techniques are suitable to vary the flow speed of working liquids in microfluidics. In future, this review …
Published in Recent Trends in Fluid Mechanics · Vol. 6, Issue 1, 2019 · pp. 20–22 Read article
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Short Review on the Materials for Microfluidics with the Experiments to Record the Surface-Driven Capillary Flow of Dyed Water in Fabricated Microfluidic Device for Bioengineering Applications
Abstract: In this review, dominant features of suitable materials for the fabrication of microfluidic devices are briefly mentioned. Surface modification techniques are useful to vary the flow-speed in microfluidic devices. Surface modification techniques are dependent on the choice of device materials. In this present paper, a single polymeric microfluidic device as sudden expansion microchannel is fabricated by author using maskless lithography, hot embossing lithography and direct bonding technique. Also, the surface-driven …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 3, 2020 · pp. 1–4 Read article
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Short Review on the Particle Image Velocimetry in Fluid Mechanics
Abstract: In this short review, the reports by few authors on particle image velocimetry are briefly described. The features of particle image velocimetry are briefly mentioned. Also, in this short review, an experimental demonstration on microfluidic flow is presented by Mukhopadhyay as author. A single microchannel bend is fabricated by microfabrication techniques. Dyed water is prepared as working liquid. The surface-driven capillary flow of dyed water is recorded and shown corresponding …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 3, 2020 · pp. 10–14 Read article
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Surface-Driven Microfluidic Flow in Fluid Mechanics
Abstract: In this short report, a brief review on surface-driven microfluidic flow is provided. Also, the maskless lithography and indirect bonding technique are used to fabricate a single SU-8 based glass microfluidic device. Dyed ethylene glycol is prepared as working liquid to test the fabricated device. The surface-driven microfluidic flow of dyed ethylene glycol is recorded by a CMOS camera catching 25 frames per second with a corresponding time-scale resolution of …
Published in Recent Trends in Fluid Mechanics · Vol. 8, Issue 3, 2021 · pp. 1–5 Read article
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Thermal Engineering: Principles, Evolution, and Comparative Analysis with Classical Approaches
Abstract: Thermal engineering is the study of heat transfer, thermodynamics and energy conversion systems. However, through the years it has progressed from classical theories, which relied on empirical correlations, to enhanced computed and nanotechnology based approaches. This paper highlights the principles of thermal engineering, its important systems and latest developments of thermal engineering and provides extensive comparisons between the classical (traditional) methods and the most recent developments or innovations such as …
Published in International Journal of Mechanical Dynamics and Systems Analysis · Vol. 4, Issue 2, 2026 Read article