Results 11 to 20 of about 1,603,272 (276)

Spectral Methods for Numerical Relativity

open access: yesLiving Reviews in Relativity, 2009
This new version has been accepted for publication in Living Reviews in ...
Grandclement, Philippe, Novak, Jérôme
openaire   +7 more sources

Spectral discretization of the time-dependent Navier-Stokes problem with mixed boundary conditions

open access: yesAdvances in Nonlinear Analysis, 2022
In this work, we handle a time-dependent Navier-Stokes problem in dimension three with a mixed boundary conditions. The variational formulation is written considering three independent unknowns: vorticity, velocity, and pressure.
Abdelwahed Mohamed, Chorfi Nejmeddine
doaj   +1 more source

Spectral Collocation Technique for Solving Two-Dimensional Multi-Term Time Fractional Viscoelastic Non-Newtonian Fluid Model

open access: yesMathematics, 2023
Applications of non-Newtonian fluids have been widespread across industries, accompanied by theoretical developments in engineering and mathematics. This paper studies a two-dimensional multi-term time fractional viscoelastic non-Newtonian fluid model by
Mohammed M. Al-Shomrani   +2 more
doaj   +1 more source

An initial boundary value problem for a partial differential equation of higher even order with a Bessel operator [PDF]

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2022
In present paper, an initial-boundary value problem is formulated in a rectangle for a higher even order partial differential equation with the Bessel operator.
Akhmadjon K. Urinov, Muzaffar S. Azizov
doaj   +1 more source

The Dirichlet problem for a three-dimensional equation of mixed type with three singular coefficients

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2017
We study the Dirichlet problem in a parallelepiped for a three-dimensional equation of mixed type with three singular coefficients. Separation of variables with Fourier series and spectral analysis are used to investigate this problem.
Akhmadjon K Urinov, Kamoliddin T Karimov
doaj   +1 more source

Nonlinear consolidation model for stratified soils with vertical drains based on spectral method

open access: yesYantu gongcheng xuebao, 2021
Many soft soil foundations with vertical drains are stratified, and the permeability and compressibility of soils change nonlinearly during the consolidation process.
XU Bin-hua 1, 2, HE Ning 1, 3, ZHOU Yan-zhang 1, ZHANG Zhong-liu 1
doaj   +1 more source

Perturbative method for generalized spectral decompositions [PDF]

open access: yes, 2000
Imposing analytic properties to states and observables we construct a perturbative method to obtain a generalized biorthogonal system of eigenvalues and eigenvectors for quantum unstable systems.
Betan, Rodolfo M. Id   +2 more
core   +1 more source

On the theory of the known inverse problems for the heat transfer equation

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2019
The inverse problems for finding the initial condition and the right-hand side were studied for the heat transfer equation. A solution of the initial boundary value problem for the inhomogeneous heat transfer equation with sufficient conditions for the ...
K.B. Sabitov, A.R. Zaynullov
doaj   +1 more source

Study of nonlinear quadratic convection on magnetized viscous fluid flow over a non-Darcian circular elastic surface via spectral approach

open access: yesJournal of Taibah University for Science, 2023
The present work investigates quadratic convection on magnetized viscous fluid flow on a circular elastic surface susceptible to Rosseland nonlinear thermal radiation and the nonlinear Boussinesq approximation.
Lijun Zhang, Nafisa Tariq, M. M. Bhatti
doaj   +1 more source

Analytical-Numerical Solution for a Third Order Space-time Conformable Fractional PDE with Mixed Derivative by Spectral and Asymptotic Methods [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2023
Initial-boundary value problems including space-time fractional PDEs have been used to model a wide range of problems in physics and engineering fields. In this paper, a non-self adjoint initial boundary value problem containing a third order fractional ...
Mohammad Jahanshahi, Reza Danaei
doaj   +1 more source

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