Results 1 to 10 of about 1,375,385 (285)

A Cartesian Method with Second-Order Pressure Resolution for Incompressible Flows with Large Density Ratios

open access: yesFluids, 2021
An Eulerian method to numerically solve incompressible bifluid problems with high density ratio is presented. This method can be considered as an improvement of the Ghost Fluid method, with the specificity of a sharp second-order numerical scheme for the
Michel Bergmann, Lisl Weynans
doaj   +1 more source

Monolithic Solvers for Incompressible Two-Phase Flows at Large Density and Viscosity Ratios

open access: yesFluids, 2021
In this paper, we investigate the accuracy and robustness of three classes of methods for solving two-phase incompressible flows on a staggered grid. Here, the unsteady two-phase flow equations are simulated by finite volumes and penalty methods using ...
Mohamed El Ouafa   +2 more
doaj   +1 more source

How Do You Picture a Genius? Children’s Images of Outstanding People

open access: yesMultidisciplinary Journal of School Education, 2022
The aim of the research is to investigate children’s ideas about outstanding people (geniuses). Three research questions were posed to 38 children aged 8–9 years: How do children imagine a genius? What gender do they identify with a genius? and What are
Joanna Łukasiewicz-Wieleba, Alicja Baum
doaj   +1 more source

Pore-scale modelling of fluid flow in porous media using the projection method for incompressible Navier-Stokes equations in irregular domains

open access: yesҚарағанды университетінің хабаршысы. Физика сериясы, 2022
This paper presents the results of numerical simulation of incompressible viscous flow in porous media, which comprise periodically arranged cylinders.
Ж.K. Акашева   +3 more
doaj   +1 more source

Relaxed Projection Methods with Self-Adaptive Step Size for Solving Variational Inequality and Fixed Point Problems for an Infinite Family of Multivalued Relatively Nonexpansive Mappings in Banach Spaces

open access: yesMathematical and Computational Applications, 2020
In each iteration, the projection methods require computing at least one projection onto the closed convex set. However, projections onto a general closed convex set are not easily executed, a fact that might affect the efficiency and applicability of ...
Safeer Hussain Khan   +2 more
doaj   +1 more source

Tapered Roller Bearing Failure Diagnosis Based on Improved Probability Box Model

open access: yesIEEE Access, 2020
Bearing failure often occurs in rotating machinery. The fault diagnosis method based on the vibration signals has been studied for many years. This paper proposed an improved probability box (ip-box) modeling method for diagnosing bearing faults.
Hong Tang, Hongliang Dai, Yi Du
doaj   +1 more source

The Solver of Boltzmann equation on unstructured spatial grids [PDF]

open access: yesКомпьютерные исследования и моделирование, 2019
The purpose of this work is to develop a universal computer program (solver) which solves kinetic Boltzmann equation for simulations of rarefied gas flows in complexly shaped devices. The structure of the solver is described in details. Its efficiency is
Movses Manvelovich Gasparyan   +5 more
doaj   +1 more source

A Fast Barzilai-Borwein Gradient Projection for Sparse Reconstruction Algorithm Based on 3D Modeling: Application to ERT Imaging

open access: yesIEEE Access, 2021
Image reconstruction for electrical resistance tomography (ERT) is an ill-posed inverse problem. L1 regularization is used to solve the inverse problem.
Shouxiao Li   +5 more
doaj   +1 more source

Numerical Method for Electromagnetic Wave Propagation Problem in a Cylindrical Anisotropic Waveguide with Longitudinal Magnetization

open access: yesAdvanced Electromagnetics, 2019
The propagation of monochromatic electromagnetic waves in metal circular cylindrical dielectric waveguide with longitudinal magnetization filled with anisotropic inhomogeneous waveguide is considered.
E. Smolkin, M. Snegur
doaj   +1 more source

An Efficient Conjugate Gradient Method for Convex Constrained Monotone Nonlinear Equations with Applications

open access: yesMathematics, 2019
This research paper proposes a derivative-free method for solving systems of nonlinearequations with closed and convex constraints, where the functions under consideration are continuousand monotone.
Auwal Bala Abubakar   +3 more
doaj   +1 more source

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