Time-Dependent Two-Dimensional Fourth-Order Problems: Optimal Convergence

2020 ◽  
pp. 429-438
Author(s):  
J. -P. Croisille ◽  
D. Fishelov
Keyword(s):  
Fourth Order ◽  
Time Dependent ◽  
Two Dimensional ◽  
Optimal Convergence ◽  
Fourth Order Problems

scholarly journals Some spectral approximations of two-dimensional fourth-order problems

1992 ◽  
Vol 59 (199) ◽  
pp. 63-63 ◽  
Author(s):  
Christine Bernardi ◽  
Giuseppe Coppoletta ◽  
Yvon Maday
Keyword(s):  
Fourth Order ◽  
Two Dimensional ◽  
Spectral Approximations ◽  
Fourth Order Problems

Two-Grid Finite-Element Method for the Two-Dimensional Time-Dependent Schrödinger Equation

2013 ◽  
Vol 5 (2) ◽  
pp. 180-193 ◽  
Author(s):  
Hongmei Zhang ◽  
Jicheng Jin ◽  
Jianyun Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Schrödinger Equation ◽  
Schrodinger Equation ◽  
Time Dependent ◽  
Two Dimensional ◽  
Optimal Convergence ◽  
Standard Finite Element Method ◽  
Finite Element Schemes ◽  
Element Method

AbstractIn this paper, we construct semi-discrete two-grid finite element schemes and full-discrete two-grid finite element schemes for the two-dimensional time-dependent Schrödinger equation. The semi-discrete schemes are proved to be convergent with an optimal convergence order and the full-discrete schemes, verified by a numerical example, work well and are more efficient than the standard finite element method.

scholarly journals Integrable unsteady motion with an application to ocean eddies

1998 ◽  
Vol 5 (3) ◽  
pp. 145-151
Author(s):  
A. D. Kirwan, Jr. ◽  
B. L. Lipphardt, Jr.
Keyword(s):  
Potential Vorticity ◽  
Particle Motion ◽  
Gulf Stream ◽  
Incompressible Flows ◽  
Unsteady Motion ◽  
Ring System ◽  
Time Dependent ◽  
Two Dimensional ◽  
Ocean Eddies ◽  
Multilayered Systems

Abstract. Application of the Brown-Samelson theorem, which shows that particle motion is integrable in a class of vorticity-conserving, two-dimensional incompressible flows, is extended here to a class of explicit time dependent dynamically balanced flows in multilayered systems. Particle motion for nonsteady two-dimensional flows with discontinuities in the vorticity or potential vorticity fields (modon solutions) is shown to be integrable. An example of a two-layer modon solution constrained by observations of a Gulf Stream ring system is discussed.

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