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Characteristics of transition to turbulence in a healthy thoracic aorta using large eddy simulation.
Sci Rep
January 2025
University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan, 680-749, Republic of Korea.
This study employed large eddy simulation (LES) with the wall-adapting local eddy-viscosity (WALE) model to investigate transitional flow characteristics in an idealized model of a healthy thoracic aorta. The OpenFOAM solver pimpleFoam was used to simulate blood flow as an incompressible Newtonian fluid, with the aortic walls treated as rigid boundaries. Simulations were conducted for 30 cardiac cycles and ensemble averaging was employed to ensure statistically reliable results.
View Article and Find Full Text PDFChemical kinetic study of lean-burn and NO/NO behaviors on ethanol/ammonia cracked gas.
Sci Total Environ
January 2025
School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China.
Ammonia (NH) holds promise as a carbon-free fuel. Blending it with highly reactive fuels could efficiently alleviate issues such as slow burning rates and narrow flammability ranges. Ethanol (CHOH) offers the advantage of carbon neutrality and has a high-octane rating.
View Article and Find Full Text PDFMicrostructure and Mechanical Properties of Mg-8Li-3Al-0.3Si Alloy Deformed Through a Combination of Back-Extrusion and Spinning Process.
Materials (Basel)
January 2025
Shanxi Key Laboratory of Magnesium-Based Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
In this work, the Mg-8Li-3Al-0.3Si (LAS830) alloy was prepared by the vacuum melting method. The as-cast alloy was subjected to backward extrusion at 250 °C and then spun at 250 °C.
View Article and Find Full Text PDFDesign and Investigation of a Passive-Type Microfluidics Micromixer Integrated with an Archimedes Screw for Enhanced Mixing Performance.
Micromachines (Basel)
January 2025
Faculty of Mechanical Engineering and Design, Kaunas University of Technology, 51424 Kaunas, Lithuania.
In recent years, microfluidics has emerged as an interdisciplinary field, receiving significant attention across various biomedical applications. Achieving a noticeable mixing of biofluids and biochemicals at laminar flow conditions is essential in numerous microfluidics systems. In this research work, a new kind of micromixer design integrated with an Archimedes screw is designed and investigated using numerical simulation and experimental approaches.
View Article and Find Full Text PDFPicosecond Laser Etching of Glass Spiral Microfluidic Channel for Microparticles Dispersion and Sorting.
Micromachines (Basel)
January 2025
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China.
In microfluidic chips, glass free-form microchannels have obvious advantages in thermochemical stability and biocompatibility compared to polymer-based channels, but they face challenges in processing morphology and quality. Hence, picosecond laser etching with galvanometer scanning is proposed to machine spiral microfluidic channels on a glass substrate. The objective is to disperse and sort microparticles from a glass microchip that is difficult to cut.
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