Results 21 to 30 of about 6,143,947 (388)

Higher-Order Blended Compact Difference Scheme on Nonuniform Grids for the 3D Steady Convection-Diffusion Equation

open access: yesAxioms, 2023
This paper proposes a higher-order blended compact difference (BCD) scheme on nonuniform grids for solving the three-dimensional (3D) convection–diffusion equation with variable coefficients.
Tingfu Ma, Bin Lan, Yongbin Ge, Lili Wu
doaj   +1 more source

Numerical study of the effect of sidewalls on shock train behaviour

open access: yesFlow, 2023
Strongly coupled sequences of shock waves, known as shock trains, are present in high-speed propulsion systems, where the presence of sidewalls substantially modifies the boundary layer thickness, skin friction and streamwise pressure distribution.
Alexander Gillespie, Neil D. Sandham
doaj   +1 more source

A ‘receptive’ boundary layer [PDF]

open access: yesJournal of Fluid Mechanics, 2010
Receptivity is the process which describes how environmental disturbances (such as gusts, acoustic waves or wall roughness) are filtered by a boundary layer and turned into downstream-growing waves. It is closely related to the identification of initial conditions for the disturbances and requires knowledge of the characteristics of the specific ...
openaire   +2 more sources

On determining characteristic length scales in pressure gradient turbulent boundary layers

open access: yes, 2016
In the present work we analyze three methods used to determine the edge of pressure gradient turbulent boundary layers: two based on composite profiles, the one by Chauhan et al. (Fluid Dyn. Res. 41:021401, 2009) and the one by Nickels (J.
R. Vinuesa, R. Örlü, P. Schlatter
semanticscholar   +1 more source

Wake properties and power output of very large wind farms for different meteorological conditions and turbine spacings: a large-eddy simulation case study for the German Bight [PDF]

open access: yesWind Energy Science, 2022
Germany's expansion target for offshore wind power capacity of 40 GW by the year 2040 can only be reached if large portions of the Exclusive Economic Zone in the German Bight are equipped with wind farms.
O. Maas, S. Raasch
doaj   +1 more source

Boundary layer analysis of nonlinear reaction-diffusion equations in a smooth domain

open access: yesAdvances in Nonlinear Analysis, 2017
In this article, we consider a singularly perturbed nonlinear reaction-diffusion equation whose solutions display thin boundary layers near the boundary of the domain.
Jung Chang-Yeol   +2 more
doaj   +1 more source

Magnetohydrodynamic cross-field boundary layer flow

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1982
The Blasius boundary layer on a flat plate in the presence of a constant ambient magnetic field is examined. A numerical integration of the MHD boundary layer equations from the leading edge is presented showing how the asymptotic solution described by ...
D. B. Ingham, L. T. Hildyard
doaj   +1 more source

Asymptotics, Stability and Region of Attraction of a Periodic Solution to a Singularly Perturbed Parabolic Problem in Case of a Multiple Root of the Degenerate Equation

open access: yesМоделирование и анализ информационных систем, 2016
For a singularly perturbed parabolic problem with Dirichlet conditions we prove the existence of a solution periodic in time and with boundary layers at both ends of the space interval in the case that the degenerate equation has a double root.
V. F. Butuzov   +3 more
doaj   +1 more source

Steady-State Navier–Stokes Equations in Thin Tube Structure with the Bernoulli Pressure Inflow Boundary Conditions: Asymptotic Analysis

open access: yesMathematics, 2021
Steady-state Navier–Stokes equations in a thin tube structure with the Bernoulli pressure inflow–outflow boundary conditions and no-slip boundary conditions at the lateral boundary are considered. Applying the Leray–Schauder fixed point theorem, we prove
Rita Juodagalvytė   +2 more
doaj   +1 more source

Asymptotic analysis of the Navier-Stokes equations in a curved domain with a non-characteristic boundary

open access: yesNetworks and Heterogeneous Media, 2012
We consider the Navier-Stokes equations of an incompressible fluid in a three dimensional curved domain with permeable walls in the limit of small viscosity.Using a curvilinear coordinate system, adapted to the boundary, we construct a corrector function
Gung-Min Gie   +2 more
doaj   +1 more source

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