Results 51 to 60 of about 148,309 (340)

Optimal boundary control in a micromixer

open access: yesExamples and Counterexamples
This work studies mathematical foundations for optimal boundary control of mixers which mix two fluid phases. Existence of optima is proved and the influence of common objective functionals is discussed.
Manuel Wegmann   +3 more
doaj   +1 more source

NUMERICAL SIMULATIONS OF FLOW BEHAVIOR IN DRIVEN CAVITY AT HIGH REYNOLDS NUMBERS

open access: yesInternational Islamic University Malaysia Engineering Journal, 2012
In recent years, due to rapidly increasing computational power, computational methods have become the essential tools to conduct researches in various engineering fields.
Fudhail Bin Abdul Munir
doaj   +1 more source

Numerical study of resistivity of model disordered three-dimensional metals [PDF]

open access: yes, 2004
We calculate the zero-temperature resistivity of model 3-dimensional disordered metals described by tight-binding Hamiltonians. Two different mechanisms of disorder are considered: diagonal and off-diagonal.
B. K. Nikolic   +5 more
core   +1 more source

Lattice Boltzmann-Langevin Equations

open access: yes, 1993
Intrinsic fluctuations around the solution of the lattice Boltzmann equation are described or modeled by addition of a white Gaussian noise source. For stationary states a fluctuation-dissipation theorem relates the variance of the fluctuations to the linearized Boltzmann collision operator and the pair correlation function.
Dufty, J.W., Ernst, M.H.
openaire   +3 more sources

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

open access: yesAdvanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah   +11 more
wiley   +1 more source

Lattice Boltzmann method for consolidation analysis of saturated clay

open access: yesJournal of Ocean Engineering and Science, 2019
The lattice Boltzmann method (LBM) has been widely employed in various areas of practical engineering to solve non-linear problems, due to such advantages as the simplicity of programming and the numerical efficiency.
Pyol Kim   +3 more
doaj   +1 more source

Shear stress in lattice Boltzmann simulations [PDF]

open access: yes, 2009
A thorough study of shear stress within the lattice Boltzmann method is provided. Via standard multiscale Chapman-Enskog expansion we investigate the dependence of the error in shear stress on grid resolution showing that the shear stress obtained by the
Dierk Raabe   +5 more
core   +2 more sources

Surface Diffusion in SnTe‐PbTe Monolayer Lateral Heterostructures

open access: yesAdvanced Functional Materials, EarlyView.
The lateral heterostructures between 2D materials often suffer from the interdiffusion at the interfaces. Here, a surface diffusion mechanism is found to be dominating at the interfaces between semiconducting SnTe and PbTe monolayers. Atomically sharp interfaces can be achieved by suppressing this diffusion process. ABSTRACT The construction of complex
Jing‐Rong Ji   +9 more
wiley   +1 more source

Entropic Lattice Boltzmann Method for Moving and Deforming Geometries in Three Dimensions

open access: yes, 2016
Entropic lattice Boltzmann methods have been developed to alleviate intrinsic stability issues of lattice Boltzmann models for under-resolved simulations.
Chikatamarla, S. S.   +2 more
core   +1 more source

Analytical solution of axi-symmetrical lattice Boltzmann model for cylindrical Couette flows [PDF]

open access: yes, 2012
Analytical solution for the axi-symmetrical lattice Boltzmann model is obtained for the low-Mach number cylindrical Couette flows. In the hydrodynamic limit, the present solution is in excellent agreement with the result of the Navier-Stokes equation ...
An, Hongyan   +3 more
core   +1 more source

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