Article
Chemistry, Analytical
Jan-Paul Ruiken, Joern Villwock, Matthias Kraume
Summary: A low-impact acoustic levitation system has been developed for studying immobilized single drops in liquid-liquid systems. This system allows for observation of liquid drops over several millimeters in diameter for extended periods, enabling fundamental research into various mechanisms. Non-invasive optical measurements with excellent optical accessibility are possible. The system proves to be effective in controlling and measuring the drop and its surrounding environment.
Article
Multidisciplinary Sciences
Rene Zuniga, German Varas, Stephane Job
Summary: In this study, experiments on vibrated particles in a two-dimensional vertical container were conducted. It was found that modifying the container geometry can change the particle state and optimize the utilization of external vibration for particle blending and vibration absorption. This phenomenon is consistent with the statistics of energy fluctuations and the description of the KTHNY theory.
SCIENTIFIC REPORTS
(2022)
Article
Astronomy & Astrophysics
A. Castellanos-Ramirez, A. Rodriguez-Gonzalez, Z. Meliani, P. R. Rivera-Ortiz, A. C. Raga, J. Canto
Summary: Analytical and numerical models of winds from red giant stars orbiting a binary companion show different structures such as double spirals, single spirals, and clumpy structures. These structures may indicate the presence of two strong winds from the stars in the central binary system.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Ivan S. Maksymov, Andrey Pototsky
Summary: Solitary-like surface waves originating from falling liquid films on an inclined plane under low-frequency vibration have unique properties and are of interest in theoretical and experimental research. We investigated the dynamics of these waves and found that the vibration decreased their average and peak amplitudes, but had little effect on their propagation speed. This makes them suitable for practical applications where pulses carrying information need to be immune to external vibrations.
APPLIED SCIENCES-BASEL
(2023)
Article
Physics, Multidisciplinary
Johannes Piotrowski, Dominik Windey, Jayadev Vijayan, Carlos Gonzalez-Ballestero, Andres de los Rios Sommer, Nadine Meyer, Romain Quidant, Oriol Romero-Isart, Rene Reimann, Lukas Novotny
Summary: Researchers have successfully cooled a levitated nanoparticle in an optical cavity to its motional ground state in two degrees of freedom simultaneously. Control of the cavity properties also allowed for the observation of the transition from 1D to 2D ground-state cooling. This achievement is important for investigating macroscopic quantum states and building high fidelity sensors.
Article
Chemistry, Multidisciplinary
Xueyang Li, Jun Du, Guohui Zhao, Boyu Zhang, Clement Livache, Namyoung Ahn, Yuxi Jia, Mingrun Li, Ying Chen, Jingyi Zhu, Jingwei Guo, Victor I. Klimov, Kaifeng Wu
Summary: A new type of liquid optical-gain medium using compact compositionally-graded quantum dots has been demonstrated, showing broad-band optical gain and stable operation under intense photoexcitation. Two-color amplified spontaneous emission has been achieved using nanosecond pulses.
ADVANCED MATERIALS
(2023)
Article
Physics, Multidisciplinary
Subhomoy Das, Alexander Butenko, Yitzhak Mastai, Moshe Deutsch, Eli Sloutskin
Summary: This study demonstrates temperature-controlled self-assembly of surface-adsorbed fluorescent molecules on water-suspended spherical oil droplets. Well-defined and highly ordered patterns are induced by self-positioned structural defects in a crystalline monolayer covering the droplets' surfaces. The findings provide insights into interfacial freezing effect on curved surfaces and enable precise positioning and self-assembly of functional ligands on droplets.
Article
Mechanics
Shabina Ashraf, Yves Meheust, Jyoti Phirani
Summary: This study proposes a model based on interacting capillaries to predict the spontaneous imbibition in quasi-two-dimensional porous media. The breakthrough time, wetting fluid saturation, and leading meniscus are determined by the capillaries' radii distribution and spatial arrangement. The model provides accurate predictions for the position in time of the saturating front and the leading visible front.
Article
Astronomy & Astrophysics
Nolene F. Naidu, Sante Carloni, Peter Dunsby
Summary: In this paper, we apply the 1 + 1 + 2 covariant semitetrad approach to study a general static and spherically symmetric relativistic stellar object containing two fluids with anisotropic pressure. The corresponding covariant Tolman-Oppenheimer-Volkoff equations are derived for the anisotropic case and new exact solutions are obtained using direct resolution and reconstruction techniques. Furthermore, we demonstrate that three generating theorems known for the single-fluid case can also be used to obtain two-fluid solutions from single-fluid solutions.
Article
Chemistry, Physical
Satoshi Nakata, Masaki Yoshikai, You Gunjima, Masao Fujiwara
Summary: This study investigates the behavior of self-propelled objects on a field without boundary by placing camphor disks on a levitated water droplet under microgravity. The research demonstrates the synchronized motion and unidirectional rotation of the camphor disks, and suggests that self-propelled objects can exhibit cooperative motion in such a field.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Multidisciplinary Sciences
Eylon Persky, Anders V. Bjorlig, Irena Feldman, Avior Almoalem, Ehud Altman, Erez Berg, Itamar Kimchi, Jonathan Ruhman, Amit Kanigel, Beena Kalisky
Summary: This paper investigates the magnetic landscape of tantalum disulfide and discovers a spontaneous vortex phase that is incompatible with ferromagnetic ordering, suggesting that the combination of superconductivity and strongly correlated systems leads to unexpected physics.
Article
Chemistry, Multidisciplinary
Y. Martinez-Raton, E. Velasco
Summary: Vibrated monolayers of granular particles confined into horizontal cavities form fluid patterns with orientational order resembling liquid-crystal phases. Different shapes of particles exhibit various liquid-crystal phases, such as nematic and smectic patterns. The theoretical work and experimental results on rectangles and triangles, as well as the findings on cylinders and geometric frustration caused by confinement, are presented.
Article
Chemistry, Multidisciplinary
Naveen Puthussery Thrivikraman, Ashish Khare, Amit Sanjay Hegde, Anilakkad Raman Harikrishnan
Summary: This study investigates the impact of bouncing and floating of water drops on a pool of immiscible volatile oil pools at low Weber numbers. The research finds that the confined evaporation and film draining dynamics result in prolonged floating and delayed sinking of drops into the oil pool. The developed mathematical model is in good agreement with the experimentally observed residence time.
Article
Multidisciplinary Sciences
Jidan Yang, Yu Zou, Wentao Tang, Jinxing Li, Mingjun Huang, Satoshi Aya
Summary: The authors report the discovery of chiral polarization meron-like structures in the emergence of quasi-2D ferroelectric nematic domains. The polarization strength plays a crucial role in determining polarization topology.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Hui Cai, Guoqing Miao
Summary: This study reported the flow pattern in a vertically vibrated, annular, and granular system, showing either laminar granular flow or turbulent granular flow in different vibration modes. The flow patterns were explained and identified using the Reynolds numbers of the granular system. The results revealed a property peculiar to the granular flow similar to, yet different from, viscous fluids.
Article
Physics, Fluids & Plasmas
Hector Pacheco-Martinez, Henk Jan Van Gerner, J. C. Ruiz-Suarez
Article
Physics, Fluids & Plasmas
C. P. Clement, H. A. Pacheco-Martinez, Michael R. Swift, P. J. King
Article
Physics, Multidisciplinary
H. A. Pacheco-Martinez, G. Peraza-Mues, F. Penunuri, O. Carvente
Summary: Kinetic energy is transferred to millimeter particles in contact with a vertically vibrated 3D container through collisions. Unstable clusters of ordered particles near the bottom surface are observed in the early stages of a vibrational annealing process, which later stabilizes into crystal seeds resembling a thermal phase transition. Molecular Dynamics simulations and Ornstein-Zernike equation analysis are used to study the unstable-stable transition and extract effective potentials associated with the phase transition. The radial distribution function and effective potentials show clear correspondence as crystallization phase begins to appear.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Chemistry, Physical
P. J. King, P. Lopez-Alcaraz, H. A. Pacheco-Martinez, C. P. Clement, A. J. Smith, M. R. Swift
EUROPEAN PHYSICAL JOURNAL E
(2007)
