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View article: Advanced IGBT Module Design for Enhanced Overcurrent Capability Using Phase Change Materials
Advanced IGBT Module Design for Enhanced Overcurrent Capability Using Phase Change Materials Open
This paper presents a novel insulated-gate bipolar transistor (IGBT) power module design that integrates phase change material (PCM) above the chips, coupled with an optimized metal frame, to enhance overcurrent (OC) capability during low-…
View article: Mass transfer and modeling of deformed bubbles in square microchannel
Mass transfer and modeling of deformed bubbles in square microchannel Open
Understanding of mass transfer in gas-liquid slug flow is imperative to design and optimize micro-reactors. There exist extensive studies on symmetric bubbles by the phase volume monitor technique, whereas deformed bubbles are rarely studi…
View article: Simultaneous Cross-type Detection of Water Quality Indexes via a Smartphone-App Integrated Microfluidic Paper-Based Platform
Simultaneous Cross-type Detection of Water Quality Indexes via a Smartphone-App Integrated Microfluidic Paper-Based Platform Open
Water quality guarantee in remote areas necessitates the development of portable, sensitive, fast, cost-effective, and easy-to-use water quality detection methods. The current work reports on a microfluidic paper-based analytical device (μ…
View article: Determination of droplet velocity in square microchannel
Determination of droplet velocity in square microchannel Open
Generally, droplet velocity in liquid-liquid two-phase flow in microchannel is obtained via droplet displacement and time interval precise determination in sequential photos/videos. The precision is tightly related to shutter speed of the …
View article: 3D gas-liquid interfaces and flow characteristics of two-phase flows in horizontal tubes
3D gas-liquid interfaces and flow characteristics of two-phase flows in horizontal tubes Open
In order to investigate the characteristics of gas-liquid two-phase flows in horizontal mini circular tubes with inner diameters of 3.14 and 6.68 mm, a prism is adopted to improve the light path in the visualization experimental setup. The…
View article: Bubble dynamics and mechanistic boiling heat transfer prediction on a scored copper surface
Bubble dynamics and mechanistic boiling heat transfer prediction on a scored copper surface Open
In this study, pool boiling heat transfer of de-ionized water was experimentally studied on a scored copper surface at a heat-flux range of 0 - 60 W/cm 2 . Bubble dynamics in an isolated bubble region were carefully investigated, including…
View article: High conversion hydrogen peroxide microchannel reactors: Design and two-phase flow instability investigation
High conversion hydrogen peroxide microchannel reactors: Design and two-phase flow instability investigation Open
Novel micro-scale reaction devices are progressing in various applications. Whereas, specialized gas-producing reactors of high conversion at micro/mini scale remain challenging and are rarely explored, but are needed urgently in new gener…
View article: Nanoparticle-Assisted Pool Boiling Heat Transfer on Micro-Pin-Fin Surfaces
Nanoparticle-Assisted Pool Boiling Heat Transfer on Micro-Pin-Fin Surfaces Open
Boiling heat transfer intensification is of significant relevance to energy conversion and various cooling processes. This study aimed to enhance the saturated pool boiling of FC-72 (a dielectric liquid) by surface modifications and explor…
View article: Toward computationally effective modeling and simulation of droplet formation in microchannel junctions
Toward computationally effective modeling and simulation of droplet formation in microchannel junctions Open
Droplet-based microfluidics is a widely used technology in various chemical and biological applications. Droplet formation is an essential part of droplet-based microfluidics. This work applied and summarized a combination of techniques fo…
View article: Studies of gas-liquid two-phase flows in horizontal mini tubes using 3D reconstruction and numerical methods
Studies of gas-liquid two-phase flows in horizontal mini tubes using 3D reconstruction and numerical methods Open
In order to study the characteristics of 3D gas-liquid interfaces, flow pattern transitions, and void fraction in mini tubes, virtual multi-vision experiments and numerical simulations are conducted in a 5.16 mm horizontal tube with air as…
View article: Pool Boiling of NOVEC-649 on Microparticle-Coated and Nanoparticle-Coated Surfaces
Pool Boiling of NOVEC-649 on Microparticle-Coated and Nanoparticle-Coated Surfaces Open
In this study, microparticle coatings and nanoparticle coatings were fabricated on copper surfaces by an electrochemical deposition method and an electrophoretic deposition method, respectively. Pool boiling of NOVEC-649 was experimentally…
View article: Smart Flow Control Processes in Micro Scale Volume 2
Smart Flow Control Processes in Micro Scale Volume 2 Open
In recent years, microfluidic devices with a large surface-to-volume ratio have witnessed rapid development, allowing them to be successfully utilized in many engineering applications. A smart control process has been proposed for many yea…
View article: Smart Flow Control Processes in Micro Scale
Smart Flow Control Processes in Micro Scale Open
In recent years, microfluidic devices with a large surface-to-volume ratio have witnessed rapid development, allowing them to be successfully utilized in many engineering applications. A smart control process has been proposed for many yea…
View article: Special Issue: Smart Flow Control in Micro Scale
Special Issue: Smart Flow Control in Micro Scale Open
Smart control processes have been proposed for many years, while for smart flow control—especially when “smart flow control” comes at the microscale—it turns out that many new innovations and enabling technologies are possible [...]
View article: Empirical Modelling of Pressure Drop in Gas Channels of Polymer Electrolyte Fuel Cells
Empirical Modelling of Pressure Drop in Gas Channels of Polymer Electrolyte Fuel Cells Open
The frictional pressure drop characteristics in gas channels of Polymer Electrolyte Fuel Cells (PEFCs) are modelled in this work.The two-phase flow in gas channels of PEFCs has its special features: (1) combination of reactant gas, water v…
View article: A Comparative Study on Pool Boiling of Fc-72 on Micro-Pin-Fin Silicon Surfaces With and Without Nanoparticles
A Comparative Study on Pool Boiling of Fc-72 on Micro-Pin-Fin Silicon Surfaces With and Without Nanoparticles Open
Several methods have been developed to enhance boiling heat transfer by surface modification, e.g., mechanical methods, chemical methods and hybrid methods.In the present study, micro-pin-fin silicon surfaces are prepared by a dry etching …
View article: Magnetic Field Effect on Thermal, Dielectric, and Viscous Properties of a Transformer Oil-Based Magnetic Nanofluid
Magnetic Field Effect on Thermal, Dielectric, and Viscous Properties of a Transformer Oil-Based Magnetic Nanofluid Open
Progress in electrical engineering puts a greater demand on the cooling and insulating properties of liquid media, such as transformer oils. To enhance their performance, researchers develop various nanofluids based on transformer oils. In…
View article: Effects of a Dynamic Injection Flow Rate on Slug Generation in a Cross-Junction Square Microchannel
Effects of a Dynamic Injection Flow Rate on Slug Generation in a Cross-Junction Square Microchannel Open
The injection flow rates of two liquid phases play a decisive role in the slug generation of the liquid-liquid slug flow. However, most injection flow rates so far have been constant. In order to investigate the effects of dynamic injectio…
View article: Thermal Characteristics of a Stratospheric Airship with Natural Convection and External Forced Convection
Thermal Characteristics of a Stratospheric Airship with Natural Convection and External Forced Convection Open
Though convective heat transfer is one of the main factors that dominate the thermal characteristics of stratospheric airships, there is no specific correlation equations for the calculation of convective heat transfer of airships. The equ…