155 citations · 671 across the 14 of their papers we have counts for
14 papers
Achieving Carnot efficiency in a finite-power Brownian Carnot cycle with arbitrary temperature difference
Kosuke Miura, Yuki Izumida, Koji Okuda
Achieving the Carnot efficiency at finite power is a challenging problem in heat engines due to the trade-off relation between efficiency and power that holds for general heat engi…
Compatibility of Carnot efficiency with finite power in an underdamped Brownian Carnot cycle in small temperature-difference regime
Kosuke Miura, Yuki Izumida, Koji Okuda
We study the possibility of achieving the Carnot efficiency in a finite-power underdamped Brownian Carnot cycle. Recently, it was reported that the Carnot efficiency is achievable…
Breathing multichimera states in nonlocally coupled phase oscillators
Yusuke Suda, Koji Okuda
Chimera states for the one-dimensional array of nonlocally coupled phase oscillators in the continuum limit are assumed to be stationary states in most studies, but a few studies r…
Molecular kinetic analysis of a local equilibrium Carnot cycle
Yuki Izumida, Koji Okuda
We identify a velocity distribution function of ideal gas particles that is compatible with the local equilibrium assumption and the fundamental thermodynamic relation satisfying t…
Persistent chimera states in nonlocally coupled phase oscillators
Yusuke Suda, Koji Okuda
Chimera states in the systems of nonlocally coupled phase oscillators are considered stable in the continuous limit of spatially distributed oscillators. However, it is reported th…
Linear irreversible heat engines based on the local equilibrium assumptions
Yuki Izumida, Koji Okuda
We formulate an endoreversible finite-time Carnot cycle model based on the assumptions of local equilibrium and constant energy flux, where the efficiency and the power are express…
Heat devices in nonlinear irreversible thermodynamics
Y. Izumida, K. Okuda, J. M. M. Roco +1
We present results obtained by using nonlinear irreversible models for heat devices. In particular, we focus on the global performance characteristics, the maximum efficiency and t…
Theoretical and numerical analysis of a heat pump model utilizing Dufour effect
Minoru Hoshina, Koji Okuda
A heat pump model utilizing the Dufour effect is proposed and studied by numerical and theoretical analysis. Numerically, we perform MD simulations of this system and measure the c…
Work Output and Efficiency at Maximum Power of Linear Irreversible Heat Engines Operating with a Finite-Sized Heat Source
Yuki Izumida, Koji Okuda
We formulate the work output and efficiency for linear irreversible heat engines working between a finite-sized hot heat source and an infinite-sized cold heat reservoir until the…
Coefficient of performance under optimized figure of merit in minimally nonlinear irreversible refrigerator
Y. Izumida, K. Okuda, A. Calvo Hernández +1
We apply the model of minimally nonlinear irreversible heat engines developed by Izumida and Okuda [EPL {\bf 97}, 10004 (2012)] to refrigerators. The model assumes extended Onsager…
Efficiency at maximum power of minimally nonlinear irreversible heat engines
Yuki Izumida, Koji Okuda
We propose the minimally nonlinear irreversible heat engine as a new general theoretical model to study the efficiency at the maximum power of heat engines operating between…
Onsager coefficients of a Brownian Carnot cycle
Yuki Izumida, Koji Okuda
We study a Brownian Carnot cycle introduced by T. Schmiedl and U. Seifert [Europhys. Lett. \textbf{81}, 20003 (2008)] from a viewpoint of the linear irreversible thermodynamics. By…
Onsager coefficients of a finite-time Carnot cycle
Yuki Izumida, Koji Okuda
We study a finite-time Carnot cycle of a weakly interacting gas which we can regard as a nearly ideal gas in the limit of where and…
Molecular kinetic analysis of a finite-time Carnot cycle
Yuki Izumida, Koji Okuda
We study the efficiency at the maximal power of a finite-time Carnot cycle of a weakly interacting gas which we can reagard as a nearly ideal gas. In several syste…