Article
Multidisciplinary Sciences
Ren-Hong Fang
Summary: We study the thermodynamics of a uniformly rotating system of chiral fermions under a uniform magnetic field and obtain mathematical expressions for some thermodynamic quantities as series expansions with respect to the external magnetic field, angular velocity, and chemical potential.
Article
Chemistry, Physical
Andrei Filippov, Rustam Gimatdinov, Oleg N. Antzutkin, Natalia A. Kuzina, Oleg Gnezdilov
Summary: The diffusion coefficient in layers of EAN confined between glass plates placed in a strong magnetic field is affected by the rotational conditions and duration of exposure to the magnetic field. While rotation along the magnetic field axis leads to a decrease in diffusion coefficient over time, rotation perpendicular to the magnetic field axis shows no effect on the diffusion coefficient until the rotation stops. Extended exposure to a static magnetic field can cause an increase in diffusivity when the sample starts to rotate around the axis perpendicular to the magnetic field.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Physics, Applied
Jiajia Sun, Zongqian Shi, Mingjia Li, Shuang Chen, Mingjie Zhong, Xiaofeng Liu, Jingjie Sha, Shenli Jia
Summary: The use of microfluidic and magnetic field-assisted self-assembly allows for the patterning of colloidal magnetic-plasmonic nanoparticles in a controlled environment, opening up new possibilities for assembling complex structures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Astronomy & Astrophysics
Matteo Buzzegoli, Jonathan D. Kroth, Kirill Tuchin, Nandagopal Vijayakumar
Summary: In this study, we investigated the synchrotron radiation emitted by a charged fermion in a constant magnetic field parallel to the axis of rotation. The rotation is classical and independent of the magnetic field. We derived the intensity, spectrum, and chirality of the electromagnetic radiation using the exact solution of the Dirac equation. Our numerical calculations demonstrate that the effect of rotation on the radiation intensity increases with the particle energy and can either strongly enhance or suppress the radiation, depending on the relative orientation of the vectors omega and B and the sign of the electric charge.
Article
Multidisciplinary Sciences
Teagan E. Bate, Megan E. Varney, Ezra H. Taylor, Joshua H. Dickie, Chih-Che Chueh, Michael M. Norton, Kun-Ta Wu
Summary: The study explores mixing dynamics of active fluids with spatiotemporally-varying activity levels. Results show a transition from diffusion-like to superdiffusion-like behaviors, with mixing efficacy depending on the Peclet number and spatial distribution of activities. Active fluid mixing involves complex coupling between active stress distribution and ATP transport.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
H. Noori, I Jogi
Summary: In this study, the Townsend breakdown mechanism for direct current discharge in argon gas was discussed, and an analytical expression for the breakdown voltage was derived. The research showed that the non-uniformity of electric field significantly affected the electron multiplication under certain electrode spacing conditions.
Article
Multidisciplinary Sciences
Fleming Bruckmaier, Robin D. D. Allert, Nick R. R. Neuling, Philipp Amrein, Sebastian Littin, Karl D. D. Briegel, Philip Schatzle, Peter Knittel, Maxim Zaitsev, Dominik B. B. Bucher
Summary: Understanding diffusion in microstructures is crucial in various scientific fields. We introduce nitrogen-vacancy center-based nuclear magnetic resonance (NMR) spectroscopy as a powerful tool to probe diffusion in microscopic samples. Our experimental scheme combines pulsed gradient spin echo (PGSE) with optically detected NV-NMR spectroscopy, enabling local quantification of molecular diffusion and flow.
Article
Materials Science, Multidisciplinary
Qing Zhang, Xiaofei Ju, Jun Liu, Lei Wang, Yang Li, Haowei Wang, Zhe Chen
Summary: The addition of TiB2 nanoparticles as reinforcement in Al-Zn-Mg-Cu composite leads to the formation of fine-equiaxed grains, which enhances both the elongation and thermal stability of the material. The deformation at grain boundaries is controlled by grain boundary sliding mechanism, and the stress release and prevention of cavitation are facilitated by locally melted Mg-rich phases.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Analytical
Masoud Rezaeian, Moein Nouri, Mojtaba Hassani-Gangaraj, Amir Shamloo, Rohollah Nasiri
Summary: This study investigates the effect of magnetic field characteristics on the efficiency of mixing processes within droplets. It is found that increasing the magnetic field intensity enhances the mixing efficiency. The study also examines the effect of ferrofluid concentration on mixing efficiency and finds that increasing the concentration significantly improves mixing efficiency.
Article
Engineering, Multidisciplinary
Pengfei Lin, Ning Zhang, Chunsheng Lin, Ming Chang, Lei Xu
Summary: The detection and localization of magnetic targets based on magnetic field signals have been a research hotspot, with a study establishing a magnetic field model for a rotating propeller as a magnetic dipole and proposing a positioning algorithm based on the rotating magnetic dipole. The analysis of positioning accuracy and factors such as uneven magnetic distribution and measurement noise revealed that accuracy increases with circular trajectory radius of magnetic moment and error due to noise increases with distance from the magnetic dipole source. Experimental verification confirmed the feasibility of the algorithm.
Article
Mechanics
Lin Huang, Zhengping Zou, Chao Fu, Yumin Liu, Fei Shao
Summary: The mixing of turbine blade tip leakage and mainstream flows leads to significant aerodynamic loss. Understanding this mixing is crucial for improving turbine performance. In this study, a detached eddy simulation is used to simulate the flow in a typical high-pressure turbine rotor. The mixing in the blade tip region is assessed using the dilution index algorithm. The influence of various parameters on mixing is identified and analyzed, and the mixing mechanism is revealed. It is found that the diffusion coefficient and the unsteady tip leakage flow stick vortices play key roles in mixing. The mixing is enhanced by the Kelvin-Helmholtz instability-induced vortices. Additionally, the tip region is divided into near and far fields, with the entrainment zone in the far field showing high degrees of mixing while the leakage jet in the near field shows minimal mixing.
Article
Thermodynamics
Andrzej Skumiel, Peter Kopcansky, Milan Timko, Matus Molcan, Katarina Paulovicova, Rafal Wojciechowski
Summary: The physical principles of magnetic hyperthermia are based on the heat generation of magnetic nanoparticles under the influence of applied magnetic fields of different configurations. The choice of a suitable methodology for generating a magnetic field can significantly affect the resulting thermal effect and thus the efficiency itself. By comparing the efficiency when the rotating magnetic field is applied versus the alternating magnetic field, it was found that the former produces more than twice the thermal effect under similar experimental conditions.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Mechanics
Yang Shi, Baoxin Lei, Yongkun Wang, Junjie Ye
Summary: This paper presents an analytical model to evaluate the self-bias magnetoelectric effect of magnetization-graded magnetoelectric composites under extensional-bending coupled vibration. The results indicate the availability of self-bias magnetic field in the composites, which can enhance the self-bias magnetoelectric coupling and adjust the resonance frequency by applying tensile stress or increasing the thickness of the high-permeability layer.
COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Grzegorz P. Mazur, Nick van Loo, Ji-Yin Wang, Tom Dvir, Guanzhong Wang, Aleksei Khindanov, Svetlana Korneychuk, Francesco Borsoi, Robin C. Dekker, Ghada Badawy, Peter Vinke, Sasa Gazibegovic, Erik P. A. M. Bakkers, Marina Quintero-Perez, Sebastian Heedt, Leo P. Kouwenhoven
Summary: This paper resolves the poor magnetic field compatibility issue of aluminum-based devices in superconducting quantum circuits by introducing adatoms of heavy elements. It is shown that the critical field of thin aluminum films can be increased by more than a factor of two. InSb nanowires strongly coupled to Al/Pt films can maintain superconductivity up to 7 T. The presence of heavy adatoms does not affect the two-electron charging effect.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yuexia Han, Fengguo Fan, Peng Wang, Dan Liu, Fengxia Hu, Pengfei Zhu, Jianfei Sun
Summary: This article reports a method of forming Moire interference patterns of magnetic nanoparticles regulated by a rotational magnetic field. This methodology provides a novel and simple means to fabricate "magic-angled" structures in the nanoscale, enriching the physical understanding of nanotechnology.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Energy & Fuels
Laura L. Trinkies, Marlene Crone, Michael Tuerk, Manfred Kraut, Roland Dittmeyer
Summary: In this study, mono- and bimetallic Pd and Pt catalysts were deposited via supercritical fluid reactive deposition (SFRD) on TiO2 coated additively manufactured substrates. The focus of this work was to evaluate the suitability of these catalysts for the direct synthesis of H2O2 in the liquid phase. The results showed that all catalysts exhibited high activity and productivity, with PdPt bimetallic catalysts showing the highest productivity and an increase in Pd loading leading to a decrease in productivity. Comparison with literature data demonstrated the high suitability of the SFRD method for the proposed application, with the added benefits of simplicity and environmental friendliness in catalyst production.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2024)
Article
Energy & Fuels
Xiongbao Hu, Zuguo Shen, Yu Wang
Summary: It is impossible to control the outer wall temperature of the micro-combustor below the maximum allowable temperature of commercial thermoelectric generators simply through increasing the equivalent heat transfer coefficient. Three simple strategies were developed to improve temperature uniformity, yet none of them could ensure full temperature control.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2024)
