The Experts below are selected from a list of 105036 Experts worldwide ranked by ideXlab platform
Nicolas Mordant - One of the best experts on this subject based on the ideXlab platform.
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Transition from wave turbulence to dynamical crumpling in vibrated elastic plates
Physical Review Letters, 2013Co-Authors: Benjamin Miquel, Alexandros Alexakis, Christophe Josserand, Nicolas MordantAbstract:We study the dynamical Regime of wave turbulence of a vibrated thin elastic plate based on experimental and numerical observations. We focus our study to the strongly non Linear Regime described in a previous letter by N. Yokoyama & M. Takaoka. At small forcing, a weakly non Linear Regime is compatible with the Weak Turbulence Theory when the dissipation is localized at high wavenumber. When the forcing intensity is increased, a strongly non Linear Regime emerges: singular structures dominate the dynamics at large scale whereas at small scales the weak turbulence is still present. A turbulence of singular structures, with folds and D-cones, develops that alters significantly the energy spectra and causes the emergence of intermittency.
Werner Kunz - One of the best experts on this subject based on the ideXlab platform.
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a general thermodynamic law for multi phase systems without turbulences in the non Linear Regime and its application to separation processes
Fluid Phase Equilibria, 2020Co-Authors: Alexander Kantner, Werner KunzAbstract:Abstract Prigogine's principle of minimum entropy production is valid only for single-phase thermodynamic systems with non-equilibrium stationary states in the Linear Regime. We will show that it can be generalized to a more general law in the non-Linear Regime for multi-phase thermodynamic systems without turbulences in the flow quantities. We take the example of fluid-mixture separation of the binary fluid mixture benzene-trichloroethylene in a distillation column, which is driven always with constant power in the various rectification processes. We will demonstrate that there are lots of stationary states depending on the additional free parameter of the return ratio of the liquid and vapor flow. We will show further that there is always one stationary state with minimum entropy production. This state corresponds to the optimum separation condition of the column and it is the one, which has the longest setting time. Although engineers use well-known, empirically found relations and equations for their calculations to optimize rectification processes, this new fundamental law of non-equilibrium thermodynamics for non-Linear multi-phase systems with laminar flow quantities rationalizes the engineers' empirical knowledge. We will demonstrate that optimizing non-Linear non-equilibrium multi-phase thermodynamic processes is based on maximization of entropy flow and minimization of entropy production, which corresponds to maximum reversible separation work for all kinds of separation processes. All performed calculations are based on rigorous thermodynamics. In following papers, we will show that this new discovery is valid for a broad range of non-Linear open thermodynamic multi-phase processes and can be beneficially used, e.g. for optimizing chemical and biochemical processes.
Yiliang Wu - One of the best experts on this subject based on the ideXlab platform.
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precise parameter extraction technique for organic thin film transistors operating in the Linear Regime
Journal of Applied Physics, 2014Co-Authors: Ognian Marinov, Jamal M Deen, Cong Feng, Yiliang WuAbstract:We demonstrate a precise parameter extraction for organic thin-film transistors (OTFTs) operating in the Linear Regime. The precision is achieved by utilizing the mathematical functions YVG and HVG that are derived from measured current-voltage (I–V) characteristics, in a proper sequence. The YVG function compensates for the impact of the contact resistance Rc on the I–V characteristics of the OTFT. The HVG function applied on the YVG function is used to determine the mobility enhancement factor γ > 0, which allows for defining the γYVG function for OTFT that is Linearly proportional to the gate-overdrive voltage (VG–VT). The Linearity of the γYVG function allows for extraction of the threshold voltage VT and the mobility μ in the OTFT. Using the extracted parameters, the reduction of the experimental data for drain-source resistance with the resistance model for the intrinsic channel allows for accurate determination of RC. The precision of the extraction technique is verified by re-simulation that uses ...
Benjamin Miquel - One of the best experts on this subject based on the ideXlab platform.
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Transition from wave turbulence to dynamical crumpling in vibrated elastic plates
Physical Review Letters, 2013Co-Authors: Benjamin Miquel, Alexandros Alexakis, Christophe Josserand, Nicolas MordantAbstract:We study the dynamical Regime of wave turbulence of a vibrated thin elastic plate based on experimental and numerical observations. We focus our study to the strongly non Linear Regime described in a previous letter by N. Yokoyama & M. Takaoka. At small forcing, a weakly non Linear Regime is compatible with the Weak Turbulence Theory when the dissipation is localized at high wavenumber. When the forcing intensity is increased, a strongly non Linear Regime emerges: singular structures dominate the dynamics at large scale whereas at small scales the weak turbulence is still present. A turbulence of singular structures, with folds and D-cones, develops that alters significantly the energy spectra and causes the emergence of intermittency.
Alexander Kantner - One of the best experts on this subject based on the ideXlab platform.
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a general thermodynamic law for multi phase systems without turbulences in the non Linear Regime and its application to separation processes
Fluid Phase Equilibria, 2020Co-Authors: Alexander Kantner, Werner KunzAbstract:Abstract Prigogine's principle of minimum entropy production is valid only for single-phase thermodynamic systems with non-equilibrium stationary states in the Linear Regime. We will show that it can be generalized to a more general law in the non-Linear Regime for multi-phase thermodynamic systems without turbulences in the flow quantities. We take the example of fluid-mixture separation of the binary fluid mixture benzene-trichloroethylene in a distillation column, which is driven always with constant power in the various rectification processes. We will demonstrate that there are lots of stationary states depending on the additional free parameter of the return ratio of the liquid and vapor flow. We will show further that there is always one stationary state with minimum entropy production. This state corresponds to the optimum separation condition of the column and it is the one, which has the longest setting time. Although engineers use well-known, empirically found relations and equations for their calculations to optimize rectification processes, this new fundamental law of non-equilibrium thermodynamics for non-Linear multi-phase systems with laminar flow quantities rationalizes the engineers' empirical knowledge. We will demonstrate that optimizing non-Linear non-equilibrium multi-phase thermodynamic processes is based on maximization of entropy flow and minimization of entropy production, which corresponds to maximum reversible separation work for all kinds of separation processes. All performed calculations are based on rigorous thermodynamics. In following papers, we will show that this new discovery is valid for a broad range of non-Linear open thermodynamic multi-phase processes and can be beneficially used, e.g. for optimizing chemical and biochemical processes.