Energy Transfer Mechanisms
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Related Articles from SNS
Energy Transfer Mechanisms in Wake-Modulated Transonic Flutter
Announce Type: new Abstract: Transonic flutter is a detrimental aeroelastic instability that can generate large-amplitude structural oscillations, leading to severe vibration, fatigue damage, reduced operational limits, and potentially catastrophic structural failure. Incoming wake disturbances can further amplify this instability, making it critical to identify the underlying aerodynamic mechanisms responsible for predicting and controlling flutter onset. The underlying flow physics is...
Inverse energy transfer in decaying MHD turbulence: A shell-to-shell analysis
Announce Type: new Abstract: In decaying magnetohydrodynamic turbulence, energy can be transported from small to large scales, known as inverse transfer. We explore the mechanism behind this phenomenon using shell-to-shell transfer functions.
Ab Initio Free Energy Surfaces for Coupled Ion-Electron Transfer
arXiv:2510.19106v4 Announce Type: replace Abstract: Although coupled ion-electron transfer (CIET) has emerged as a powerful framework to rationalize the kinetics of Faradaic reactions, its mechanism has lacked a fully microscopic, first-principles description. Here we show that the coupling of electron-transfer to ion-transfer can be understood as an extension of Marcus theory in which the ensemble of diabatic nuclear configurations is conditioned on a classical collective variable...
Ab Initio Free Energy Surfaces for Coupled Ion-Electron Transfer
arXiv:2510.19106v5 Announce Type: replace Abstract: Although coupled ion-electron transfer (CIET) has emerged as a powerful framework to rationalize the kinetics of Faradaic reactions, its mechanism has lacked a fully microscopic, first-principles description. Here we show that the coupling of electron-transfer to ion-transfer can be understood as an extension of Marcus theory in which the ensemble of diabatic nuclear configurations is conditioned on a classical collective variable...
How nonlinear spectral back transfer limits the temporal coherency of zonal modes?
arXiv:2604.03421v2 Announce Type: replace Abstract: Zonal modes are central to magnetic confinement because their radial shears regulate turbulence and transport. While the generation of these flows is well understood, the mechanisms limiting their persistence in collisionless regimes remain unresolved. In this paper, we demonstrate that nonlinear spectral back-transfer of free energy from zonal modes to turbulence sets the fundamental limit on the temporal coherency of the shearing field.
Viscous spectral energy coupling across scales in generalised Newtonian fluids
Announce Type: new Abstract: We investigate the spectral energy dynamics of turbulent flows with variable viscosity using direct numerical simulation of homogeneous isotropic turbulence of generalised Newtonian fluids described by the Carreau constitutive model, covering both shear-thinning and shear-thickening regimes. The spectral evolution equations for the variable viscosity Navier-Stokes system show that the viscous term becomes nonlinear and gives rise to a convolution product in...
Controlling energy delivery with bistable nanostructures
arXiv:2506.14266v3 Announce Type: replace-cross Abstract: Countless biological processes are fueled by energy-rich molecules like ATP and GTP that supply energy with extreme efficiency. However, designing similar energy-delivery schemes from the bottom up, essential for the development of powered nanostructures and other \emph{de novo} machinery, presents a significant challenge: how can an energy-rich structure be stable in solution yet still deliver this energy at precisely the right time?...
Collisionless Bulk Electron Heating in Resonant Low-Voltage Capacitively Coupled Plasmas
arXiv:2606.09493v1 Announce Type: new Abstract: We investigate collisionless power absorption in resonant, low$-$pressure capacitively coupled plasmas (CCPs). In these radio-frequency (RF) discharges, the sheath capacitance almost exactly balances the plasma inductance, driving the total RF discharge voltage down to just a few volts. However, plasma persists not only in this ultra$-$low$-$voltage regime; it also generates ions that strike the electrodes with kinetic energies substantially...
Heat breaks the rules at the nanoscale and scientists used it to their advantage
Heat breaks the rules at the nanoscale and scientists used it to their advantage Tiny gold-engineered structures let scientists dramatically boost and control heat flow, potentially transforming everything from computer chips to energy systems. - Date: - June 8, 2026 - Source: - College of Engineering, Carnegie Mellon University - Summary: - Scientists used nanoscale gold metamaterials to supercharge heat transfer across tiny gaps, achieving up to four times more energy flow than similar...
New discovery upends an 80-year-old theory of turbulence
New discovery upends an 80-year-old theory of turbulence Scientists have found a way to steer the flow of turbulent energy, overturning a long-held rule. - Date: - June 3, 2026 - Source: - University of Pittsburgh - Summary: - Researchers discovered a way to reverse the direction of energy flow in turbulence, challenging a theory that has stood for more than 80 years.