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An efficient forward semi-Lagrangian model
Sun, Wen-Yih
TAO : Terrestrial, atmospheric, and oceanic sciences, 2024-12, Vol.35 (1), p.2-6, Article 2
[Periódico revisado por pares]
Singapore: Springer Nature Singapore
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Título:
An efficient forward semi-Lagrangian model
Autor:
Sun, Wen-Yih
Assuntos:
Accuracy
;
Air pollution
;
Atmospheric models
;
Atmospheric Sciences
;
Backward
;
Coefficients
;
Courant number
;
Courant–Friedrichs–Lewy criterion (CFL)
;
Cubic equations
;
Diamonds
;
Earth and Environmental Science
;
Earth Sciences
;
Fluid dynamics
;
Fluids
;
Forward
;
Lagrange coordinates
;
Lagrangian coordinates
;
Lagrangian scheme
;
Marine pollution
;
Modelling
;
Oceanography
;
Original Article
;
Pollution dispersion
;
Pollution transport
;
Polynomials
;
Raindrops
;
Semi-Lagrangian
;
Variables
;
Vortices
É parte de:
TAO : Terrestrial, atmospheric, and oceanic sciences, 2024-12, Vol.35 (1), p.2-6, Article 2
Descrição:
An efficient forward trajectory model is proposed, in which the property and position of the fluids advected from the Euler coordinates to the Lagrangian coordinates can be accurately evaluated. After sorting and aligning those fluid elements on the irregular Lagrangian curves, we apply the cubic or other high-degree polynomials to interpolate the properties of the elements from the irregular curves to the regular grids. There is no need to solve the cubic equations and the associated coefficients as proposed previously. The model is quite simple, accurate, and much more efficient than the previous models. It also allows higher-order polynomials to be employed in the interpolations. It is suitable for simulating the multi-dimensional fast-moving flows with large Courant Numbers, the transport of pollutants in the atmosphere and ocean, and movement of raindrops in atmospheric models.
Editor:
Singapore: Springer Nature Singapore
Idioma:
Inglês
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