Article
Physics, Multidisciplinary
F. Feraco, R. Marino, L. Primavera, A. Pumir, P. D. Mininni, D. Rosenberg, A. Pouquet, R. Foldes, E. Leveque, E. Camporeale, S. S. Cerri, H. Charuvil Asokan, J. L. Chau, J. P. Bertoglio, P. Salizzoni, M. Marro
Summary: Recent studies have shown that large-scale intermittency in stably stratified flows is caused by the emergence of sporadic extreme events, represented by bursts in vertical velocity and temperature. The enhancement of classical small-scale intermittency is attributed to the appearance of large-scale drafts, linking large- and small-scale bursts.
Article
Physics, Applied
Zhiyong Wei, Li Xiang, Yajing Kan, Yan Zhang, Yunfei Chen
Summary: In this study, the effects of normal load on the friction force of a sliding graphene film were investigated using molecular dynamics simulations. It was found that the excited phonon modes couple with the resonant frequency of the frictional system, and the enhancement of normal load is equivalent to the increase of the resonant frequency. The relative intensity of resonant peaks in the vibrational density of states was identified as a key factor affecting the friction force.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Optics
Pei Wang, Rosario Fazio
Summary: In this paper, the driven-dissipative p-spin models for p >= 2 were studied using a semiclassical approach to derive the equation of motion in the thermodynamic limit. Long-time asymptotic states were analytically obtained, showing multistability in certain regions of the parameter space. Both first-order and continuous dissipative phase transitions were found, with transition properties depending on the symmetry and semiclassical multistability, exhibiting different behaviors for p = 2, odd p (p >= 3), and even p (p >= 4).
Article
Geosciences, Multidisciplinary
Christopher H. Lashley, Sebastiaan N. Jonkman, Jentsje van der Meer, Jeremy D. Bricker, Vincent Vuik
Summary: Many coastlines around the world are protected by dikes with shallow foreshores. Most of the studies assessing their effectiveness have ignored the influence of infragravity waves. This study proposes a framework to estimate the probability of coastal dike failure, including the influence of infragravity waves, and applies it to the Dutch Wadden Sea coast.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Enrico Gnecco, Liron Agmon, Ronen Berkovich
Summary: In this study, we numerically investigate the occurrence of long slips when a point mass representing a tip of a solid surface is driven elastically on a hexagonal surface lattice. We estimate the tip pathways and slip length histograms for different damping coefficients. Comparisons with analytical models and experimental data provide insights into the energy dissipation and quantum effects during sliding friction on the atomic scale.
Article
Engineering, Civil
Zaid A. Al-Sadoon, Abdul Saboor Karzad, Abdullah Sagheer, Mohammad AlHamaydeh
Summary: This paper presents a newly patented type of Buckling Restrained Braces (BRBs) system, which consists of a stainless-steel core bar inserted into a buckling inhibiting unit made of mild steel pipe. The system allows for easy replacement of core and end units. Testing was conducted on six BRB samples, and only the full threaded core and smooth shaved core bars passed the qualification test. The threaded cross-sectional type of core bar showed the highest energy dissipation and attained ductility. A 3D NLFEA model created using ABAQUS software showed good agreement with experimental results.
Article
Physics, Multidisciplinary
Dhawal Buaria, Alain Pumir
Summary: Building on the Navier-Stokes dynamics, this study proposes a simple framework to quantify extreme events and smallest scales of turbulence by considering the vortical structures and the correlation between vorticity and strain rate. The results show excellent agreement with direct numerical simulations of isotropic turbulence, and indicate the shortcomings of current intermittency models. The study emphasizes the importance of the correlation between vorticity and strain in developing an accurate understanding of intermittency in turbulence.
PHYSICAL REVIEW LETTERS
(2022)
Article
Engineering, Civil
Ya Lu, Jingcheng Han, Puyan Wang, Xiangguo Wu, Hyeon-Jong Hwang, Jian Zhou, Ran Li, Sung-Hyun Kim, Ho -Jun Lee
Summary: An analytical model was developed to predict the flexural behavior of ultra-high performance fiber reinforced concrete (UHPFRC) based on the three-dimensional random distribution of fibers. A probability distribution model of fiber orientation, which agreed with measured data, was proposed. The model considered the effect of fiber orientation on the number of fibers at the fracture surface. The proposed model successfully predicted the peak flexural strength and energy dissipation of UHPFRC beams.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Morteza Karimi Chahartaghi, Sohrab Nazari, Mohsen Solimani Babarsad
Summary: The study found that the width opening downstream of a chute structure has an impact on the depth and dimensions of downstream scour hole, increasing the width ratio can reduce the depth and length of the scour pit while enhancing flow energy dissipation along the chute. Additionally, using perforated piers can increase the length of the scour pit but decrease its depth and relative flow energy dissipation.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Qinghua Yang, Qian Yang
Summary: The research found that the optimal baffle spacing of the baffle drop shaft is at the design flow rate in free-drop flow, while too dense or too sparse spacing affects energy dissipation. The energy dissipation modes of the shaft include inlet, baffle, and shaft-bottom energy dissipation, with baffles playing a major role at low flow rates.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
B. B. Cael, Ali Mashayek
Summary: The log-skew-normal (LSN) distribution is more appropriate for describing turbulent kinetic energy dissipation rate, in excellent agreement with observations, with important implications for turbulence sampling.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Caio Eadi Stringari, Pedro Veras Guimaraes, Jean-Francois Filipot, Fabien Leckler, Rui Duarte
Summary: Wave breaking is a crucial process for energy dissipation in the ocean, but a proper understanding is lacking due to limited observational field data. A novel machine learning method is introduced in this study to detect active wave breaking with a high classification accuracy score of approximately 90%. The method can be used for statistical description of breaking wave properties.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Fluids & Plasmas
Adway Kumar Das, Anandamohan Ghosh
Summary: Matrix models showing a chaotic-integrable transition in the spectral statistics are important for understanding many-body localization. In this work, the eigenvector properties of the ?? ensemble are numerically studied and nonergodic extended states are observed over a finite interval of parameter values.
Article
Multidisciplinary Sciences
Kiera Kean, William Layton, Michael Schneier
Summary: We have proven an estimate of total energy dissipation in general eddy viscosity models for shear flows, where the ratio of near wall average viscosity to the effective global viscosity plays a key role. This result is then applied to the 1-equation, URANS model of turbulence, which depends on the specification of turbulence length scale.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Multidisciplinary Sciences
Denys Baranovskyi, Sergey Myamlin
Summary: The paper explores the potential for self-organization processes in the tribosystems of diesel engines. It introduces a criterion for determining the possibility of self-organization processes in the second-level subsystems of the tribosystems, indicating a decrease in the flow of mechanical energy in real irreversible processes. The study considers three cases of self-organization process development in the crankshaft-insert tribosystem of a diesel engine 10D100. It concludes that in order to reduce wear rate, it is necessary to facilitate energy-mass transfer on contacting surfaces through gradients of chemical potentials and dislocation density.
SCIENTIFIC REPORTS
(2023)
Article
Physics, Condensed Matter
Rafael Gallego, Mario Castro, Juan M. Lopez
EUROPEAN PHYSICAL JOURNAL B
(2016)
Article
Physics, Multidisciplinary
Diego Pazo, Juan M. Lopez, Antonio Politi
PHYSICAL REVIEW LETTERS
(2016)
Article
Meteorology & Atmospheric Sciences
D. Pazo, A. Carrassi, J. M. Lopez
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2016)
Article
Physics, Multidisciplinary
Ramon Planet, Juan M. Lopez, Stephane Santucci, Jordi Ortin
PHYSICAL REVIEW LETTERS
(2018)
Article
Mathematics, Applied
Diego Pazo, Juan M. Lopez, Rafael Gallego, Miguel A. Rodriguez
Article
Physics, Multidisciplinary
D. Pazo, J. M. Lopez, M. A. Rodriguez
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2013)
Article
Mechanics
Alejandro Ales, Juan M. Lopez
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2020)
Article
Multidisciplinary Sciences
Catharina E. Graafland, Jose M. Gutierrez, Juan M. Lopez, Diego Pazo, Miguel A. Rodriguez
SCIENTIFIC REPORTS
(2020)
Article
Multidisciplinary Sciences
M. Romero-Bastida, Juan M. Lopez
SCIENTIFIC REPORTS
(2020)
Article
Materials Science, Multidisciplinary
Fernando Gomez-Ortiz, Pablo Garcia-Fernandez, Juan M. Lopez, Javier Junquera
Summary: We investigated the emergence of Berezinskii-Kosterlitz-Thouless (BKT) phases in (PbTiO3)3/(SrTiO3)3 superlattices using second-principles simulations. Under a tensile epitaxial strain of e = 0.25-1%, the local dipole moments within the superlattices are confined to the film-plane, leading to two-dimensional polarization. Our analysis of dipole-dipole correlation decay, density of defects, and temperature dependence supports the existence of a BKT phase, characterized by quasi-long-range order and the presence of tightly bound vortex-antivortex pairs. This proposed superlattice model can be experimentally verified due to its feasibility in fabrication and the imposed mechanical boundary conditions.
Article
Materials Science, Multidisciplinary
Fernando Gomez-Ortiz, Pablo Garcia-Fernandez, Juan M. Lopez, Javier Junquera
Summary: We studied the equilibrium arrangements of polarization vortices in (PbTiO3)(n)/(SrTiO3)(n) superlattices using first-principles simulations. We found that at low temperatures, these polarization vortices form a regular pattern with clear handedness. As the temperature increases, the handedness of the polarization vortices is lost.
Article
Physics, Fluids & Plasmas
Alejandro Ales, Juan M. Lopez
Summary: The study focuses on the roughening properties of an anharmonic elastic interface under temporally correlated noise, providing analytical expressions for critical exponents and revealing that anomalous roughening does not exist in dimensions greater than 1.
Article
Physics, Fluids & Plasmas
David Velasco, Juan M. Lopez, Diego Pazo
Summary: Globally coupled maps (GCMs) are prototypical examples of high-dimensional dynamical systems where an ensemble of weakly coupled identical chaotic units form GCMs typically exhibit hyperchaotic turbulent state. Recent study shows that in turbulent GCMs with positive multipliers, the largest Lyapunov exponent (LE) does not follow the logarithmic relationship as previously predicted, but follows a power-law scaling instead.
Article
Physics, Fluids & Plasmas
Alejandro Ales, Juan M. Lopez
Article
Physics, Fluids & Plasmas
M. Romero-Bastida, Jorge-Orlando Miranda-Pena, Juan M. Lopez