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Solid-liquid triboelectric nanogenerators (SL-TENGs) have shown promising prospects in energy harvesting and application from water resources. However, the low contact separation speed, small contact area, and long contacting time during solid-liquid electrification severely limit their output properties and further applications. Here, by leveraging the rheological properties of gas-liquid two-phase flow and the Venturi-like design, we circumvent these limitations and develop a previously unknown gas-liquid two-phase flow-based TENG (GL-TENG) that can achieve ultrahigh voltage and volumetric charge density of 3789 volts and 859 millicoulombs per cubic meter, respectively. With a high-power output of 143.6 kilowatts per cubic meter, a 24-watt commercial lamp can be directly lighted by a continuous-flow GL-TENG device. The high performance displayed SL-TENGs in this work provides a promising strategy for the practical application of solid-liquid TENGs in energy harvesting and sensing applications.
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http://dx.doi.org/10.1126/sciadv.add0464 | DOI Listing |
Langmuir
September 2025
School of Mechanical Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China.
In engineering applications where extreme environmental conditions are becoming increasingly prevalent, the dynamic behavior of liquid droplets on solid surfaces plays a vital role in determining system efficiency and reliability. Particularly in scenarios such as anti-icing, anticorrosion, and self-cleaning, the fabrication of micro/nanostructured surfaces with exceptional hydrophobic properties has emerged as a critical strategy. However, constrained by the technical limitations of current experimental equipment in microscale observation and the capture of transient droplet impact processes, the influence mechanism of statistical roughness parameters (skewness and kurtosis) on droplet bouncing remains underexplored.
View Article and Find Full Text PDFAdv Sci (Weinh)
August 2025
State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China.
Gas-liquid two-phase flow-based triboelectric nanogenerators (GL-TENGs) have gained widespread attention due to their ability to convert the kinetic energy of complex flowing fluids into electrical power, but limitation such as relatively low output power density imposed by interfacial effects severely restrict their output performance. Here, a novel tubular bulk effect gas-liquid mixing triboelectric nanogenerator (TBE-GL-TENG) is designed to significantly enhance the output performance of GL-TENGs. The instantaneous output voltage, output current, and transferred charge of 1530 V, 112 µA, and 0.
View Article and Find Full Text PDFWater Res
July 2025
State Key Laboratory of Advanced Separation Membrane Materials, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, TianGong University, Tianjin 300387, China; Shaoxing keqiao Institute of Tiangong University, Shao Xing 312030, China. Electronic address: wang
The performance of bubbles in the hollow fiber membrane module has been explored to overcome the membrane fouling in many studies. In this study, to obtain a better strategy, the process of slug bubbles tracking under different crossflow velocity and aeration intensity has been explored in the tubular system. Based on an in-suit investigation method, Fiber Bragg Grating (FBG) sensing technology, the bubbles velocity, coalescence number, travelling distance, interference aera were investigated in the slug bubbles tracking process.
View Article and Find Full Text PDFACS Omega
July 2025
School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
The flow characteristics of gas-liquid two-phase flow significantly impact the operational efficiency of triple-screw pumps, playing a crucial role in the optimization of structural design and assembly of these pumps. To investigate the influence of gas volume fraction on the flow field and rotor of a triple-screw pump, a transient simulation analysis of the flow field in the multiphase triple-screw pump under different gas volume fraction conditions was conducted based on the Eulerian-Eulerian heterogeneous flow model and the immersed solid method. Furthermore, a mechanical simulation analysis of the rotor was performed based on the obtained results.
View Article and Find Full Text PDFLangmuir
September 2025
Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
Microreactors offer the advantage of high interfacial area density and are, therefore, ideal candidates for performing gas-liquid reactions limited by the mass transfer between the two phases. The slug or Taylor flow regime is generally the preferred regime of operation due to its unique flow characteristics. In this work, we use the volume of fluid method to model mass transfer in gas-liquid Taylor flow in a circular microchannel and understand the effect of two-phase or mixture velocity, bubble length, slug length, and Henry's constant on mass transfer.
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