Results 31 to 40 of about 22,003 (145)

Pseudospectra of the Convection-Diffusion Operator [PDF]

open access: yesSIAM Journal on Applied Mathematics, 1994
Summary: The spectrum of the simplest 1D convection-diffusion operator is a discrete subset of the negative real axis, but the pseudospectra are regions in the complex plane bounded approximately by parabolas. Put another way, the norm of the resolvent is exponentially large as a function of the Péclet number throughout a certain approximately ...
Reddy, Satish C., Trefethen, Lloyd N.
openaire   +2 more sources

Gaussian radial basis functions method for linear and nonlinear convection–diffusion models in physical phenomena

open access: yesOpen Physics, 2021
In this study, we propose a simple direct meshless scheme based on the Gaussian radial basis function for the one-dimensional linear and nonlinear convection–diffusion problems, which frequently occur in physical phenomena.
Wang Fuzhang   +3 more
doaj   +1 more source

Exact Solutions for Some Partial Differential Equations by Using First Integral Method [PDF]

open access: yesالمجلة العراقية للعلوم الاحصائية, 2011
In this paper, some exact solutions for the convection–diffusion–reaction equation in two dimensions and a nonlinear system of partial differential equations are formally derived by using the first integral method, which are based on the theory of ...
doaj   +1 more source

G-jitter induced magnetohydrodynamics flow of nanofluid with constant convective thermal and solutal boundary conditions. [PDF]

open access: yesPLoS ONE, 2015
Taking into account the effect of constant convective thermal and mass boundary conditions, we present numerical solution of the 2-D laminar g-jitter mixed convective boundary layer flow of water-based nanofluids.
Mohammed J Uddin   +2 more
doaj   +1 more source

Convective diffusion near a consolute point [PDF]

open access: yesInternational Journal of Heat and Mass Transfer, 1993
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Fuller, T.F., Newman, J.
openaire   +2 more sources

Space–Time Radial Basis Function–Based Meshless Approach for Solving Convection–Diffusion Equations

open access: yesMathematics, 2020
This article proposes a space–time meshless approach based on the transient radial polynomial series function (TRPSF) for solving convection–diffusion equations.
Cheng-Yu Ku, Jing-En Xiao, Chih-Yu Liu
doaj   +1 more source

Revisiting the natural convection effects at ultra-low redox concentration solutions: The influence of viscosity and diameter of wire electrode

open access: yesElectrochemistry Communications
Natural convection could arise even at ultra-low redox concentration solutions (1–10 mM). Models such as convection–diffusion layer model and spontaneous convection model have been established to describe this phenomenon.
Zichen Zhang   +6 more
doaj   +1 more source

Richardson Extrapolation for Singularly Perturbed Fredholm Integro Differential Equations [PDF]

open access: yesInternational Journal of Mathematical, Engineering and Management Sciences
This study numerically derived the higher order convergence for a class of singularly perturbed Fredholm integro differential equations with reaction diffusion and convection diffusion type problems.
P. Antony Prince   +2 more
doaj   +1 more source

Preserving Symmetry in Convection-diffusion Schemes [PDF]

open access: yes, 2002
We propose to perform turbulent flow simulations in such manner that the difference operators do have the same symmetry properties as the corresponding differential operators. That is, the convective operator is represented by a skew-symmetric difference operator and the diffusive operator is approximated by a operators forms in itself a motivation for
Verstappen, R.W.C.P., Veldman, A.E.P.
openaire   +2 more sources

Pore-scale evaluation of CO2 miscible displacement in porous rocks induced by convection and diffusion: implications for CO2 geo-sequestration

open access: yesInternational Journal of Coal Science & Technology
CO2 enhanced oil recovery plays an important role in carbon storage and utilization. However, the incomplete understanding of the underlying microscopic convection–diffusion mechanisms in complex pore structures has constrained the broader industrial ...
Xiangjie Qin   +5 more
doaj   +1 more source

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