Results 131 to 140 of about 181,693 (317)

Lattice Boltzmann Method Simulations About Shale Gas Diffusion in Sinusoidal Channels

open access: yesEnergy Science &Engineering, EarlyView.
This paper characterizes the microscopic features of shale nanopores using sinusoidal functions and investigates the diffusion effects of methane gas in irregular nanopores through the lattice Boltzmann method. The result shows that methane is significantly influenced by large‐amplitude protrusions of the wall.
Xu Yan   +4 more
wiley   +1 more source

A stability result for parameter identification problems in nonlinear parabolic problems

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1995
A sequence of identification problems of coefficients in the parabolic equation with nonlinear boundary conditions is considered. The parameter (index of an element of the sequence) appears in the cost functionals as well as boundary data.
Stanislaw Migórski
doaj   +1 more source

Space‐Time Modeling and Numerical Simulations of Non‐Newtonian Fluids Using Internal Variables

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
Based on Hamilton's principle, the study focuses on a novel strategy for the modeling of non‐Newtonian fluids with the help of internal variables. Here, the viscosity evolves locally in space and time. Three configurations are numerically implemented, namely channel flow, a benchmark, and a lid‐driven cavity.
Philipp Junker, Thomas Wick
wiley   +1 more source

On the Second Order of Accuracy Stable Implicit Difference Scheme for Elliptic-Parabolic Equations

open access: yesAbstract and Applied Analysis, 2012
We are interested in studying a second order of accuracy implicit difference scheme for the solution of the elliptic-parabolic equation with the nonlocal boundary condition. Well-posedness of this difference scheme is established.
Allaberen Ashyralyev, Okan Gercek
doaj   +1 more source

Error Analysis of a Pressure‐Correction Method With Explicit Time‐Stepping

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
We study explicit variants of this well‐established pressure‐correction scheme for solving the Navier–Stokes equations. Step 3 is replaced by an explicit time‐integration method. We give the complete error analysis for this scheme that allows for highly efficient implementations.
Utku Kaya, Thomas Richter
wiley   +1 more source

A Filter‐Matrix Lattice‐Boltzmann Methodology for Convective Melting and Solidification

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
We propose a new methodology for simulating melting and solidification that can be used in lattice‐Boltzmann schemes that are based on filter‐matrix collision operators. The methodology includes an iteration‐free source‐based enthalpy method for phase‐change and an immersed boundary technique.
Celeke Bus   +2 more
wiley   +1 more source

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