نتایج جستجو برای: nonequilibrium flow
تعداد نتایج: 491788 فیلتر نتایج به سال:
We report the application of a far-from-equilibrium statistical-mechanical theory to a nontrivial system with Newtonian interactions in continuous boundary-driven flow. By numerically time stepping the force-balance equations of a one-dimensional model fluid we measure occupancies and transition rates in simulation. The high-shear-rate simulation data reproduce the predicted invariant quantitie...
We generalize nonperturbative renormalization group methods to nonequilibrium critical phenomena. Within this formalism, reaction-diffusion processes are described by a scale-dependent effective action, the flow of which is derived. We investigate branching and annihilating random walks with an odd number of offspring. Along with recovering their universal physics (described by the directed per...
Tin-phthalocyanine molecules adsorbed on Ag(111) were contacted with the tip of a cryogenic scanning tunneling microscope. Orders-of-magnitude variations of the single-molecule junction conductance were achieved by controllably dehydrogenating the molecule and by modifying the atomic structure of the surface electrode. Nonequilibrium Green's function calculations reproduce the trend of the cond...
We study the Kondo effect in quantum dots in an out-of-equilibrium state due to an applied dc-voltage bias. Using the method of infinitesimal unitary transformations ("flow equations"), we develop a perturbative scaling picture that naturally contains both equilibrium coherence and nonequilibrium decoherence effects. This framework allows one to study the competition between Kondo effect and cu...
Abstract The computational model designed for studying the processes of non-equilibrium physicochemical gas dynamics in supersonic rarefied-air flow past a blunt plate finite dimensions under laboratory experiment conditions is formulated. based on two-dimensional Navier–Stokes equations, energy conservation laws translational degrees freedom atoms and molecules vibrational diatomic molecules, ...
The non-Newtonian shear rheology of colloidal dispersions is the result of the competition and balance between hydrodynamic (dissipative) and thermodynamic (conservative) forces that lead to a nonequilibrium microstructure under flow. We present the first experimental measurements of the shear induced microstructure of a concentrated, near hard-sphere colloidal dispersion through the shear thic...
Thermal transpiration flow of rarefied gases in annular channels is considered where the driving force for the flow is a temperature gradient applied in the channel walls. The influence of gas rarefaction, aspect ratio of the annulus, and surface accommodation coefficient on mass and heat transfer in the process are investigated. An analytical approach to the problem is conducted based on linea...
An approach is provided to estimate male gene flow and the ratio of male to female gene flow, given that there are estimates of diploid, nuclear gene flow and haploid, female gene flow. This approach can be applied to estimates of differentiation (F ST ) from biparentally and maternally inherited markers, assuming the equilibrium island model and equal effective numbers of males and females. Co...
The method of nonequilibrium molecular dynamics (NEMD) is used to simulate microscopic models of macromolecular fluids in flow situations. Procedures to extract rheological properties, such as the (non-newtonian) viscosity, normal pressure differences as well as information on flow induced structural changes, are discussed. This contribution focusses on polymer melts and polymer solutions, liqu...
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