Results 21 to 30 of about 442,315 (312)

Cavitation Characteristics and Structure Optimization of Two-Dimensional Valve Based on Entropy Production Theory [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2023
In addition to noise and vibration, cavitation also lowers the efficiency, performance, and working lives of two-dimensional valves. To study the effect of cavitation on the flow characteristics of two-dimensional valves, standard  turbulence model and ...
Y. Zhao, J. Mi, J. Ruan
doaj   +1 more source

Geometrical aspects of entropy production in stochastic thermodynamics based on Wasserstein distance

open access: yesPhysical Review Research, 2021
We study a relationship between optimal transport theory and stochastic thermodynamics for the Fokker-Planck equation. We show that the lower bound on the entropy production is the action measured by the path length of the L^{2}-Wasserstein distance ...
Muka Nakazato, Sosuke Ito
doaj   +1 more source

Determination of the entropy production during glass transition: Theory and experiment [PDF]

open access: yesJournal of Non-Crystalline Solids, 2019
A glass is a non-equilibrium thermodynamic state whose physical properties depend on time. Glass formation from the melt, as well as the inverse process of liquid structural recovery from the glass are non-equilibrium processes. A positive amount of entropy is produced during such irreversible processes.
H. Jabraoui   +3 more
semanticscholar   +5 more sources

Stealth Entropy Production in Active Field Theories near Ising Critical Points [PDF]

open access: yesPhysical Review Letters, 2020
Version as accepted for publication in Physical Review ...
Caballero, Fernando, Cates, Michael E.
openaire   +3 more sources

Theoretical Analysis of Entropy Generation at the Blade Interface of a Tubular Turbine Under Cooperative Conditions

open access: yesFrontiers in Energy Research, 2021
To study the influence of the blade entropy production range on the efficiency of a tubular turbine under coassociated conditions, the renormalization group K–ε turbulence model was used to simulate the full flow passage of the tubular turbine based on ...
Zhenggui Li   +4 more
doaj   +1 more source

Suppressing the Vortex Rope Oscillation and Pressure Fluctuations by the Air Admission in Propeller Hydro-Turbine Draft Tube [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2023
For the purpose of automatic generation control (AGC), a portion of the propeller hydro-turbine units in China is adjusted to operate within a restricted range of 75%-85% load using computer-controlled AGC strategies.
H. Wu   +9 more
doaj   +1 more source

Entropy Analysis of a Valveless Piezoelectric Pump With Hyperbolic Tubes

open access: yesFrontiers in Energy Research, 2022
In order to solve the problems of large reflux and low output performance of the valveless piezoelectric pump with conical tubes, the valveless piezoelectric pump with hyperbolic tubes was proposed.
Qing Yang, Jun Chen
doaj   +1 more source

Steady state entropy production rate for scalar Langevin field theories [PDF]

open access: yesJournal of Statistical Mechanics: Theory and Experiment, 2021
Abstract The entropy production rate (EPR) offers a quantitative measure of time reversal symmetry breaking in non-equilibrium systems. It can be defined either at particle level or at the level of coarse-grained fields such as density; the EPR for the latter quantifies the extent to which these coarse-grained fields behave irreversibly.
Li, Yuting I, Cates, Michael E
openaire   +2 more sources

A Photon Force and Flow for Dissipative Structuring: Application to Pigments, Plants and Ecosystems

open access: yesEntropy, 2022
Through a modern derivation of Planck’s formula for the entropy of an arbitrary beam of photons, we derive a general expression for entropy production due to the irreversible process of the absorption of an arbitrary incident photon spectrum in material ...
Karo Michaelian   +1 more
doaj   +1 more source

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