نتایج جستجو برای: lax wendroff method
تعداد نتایج: 1632728 فیلتر نتایج به سال:
This work is concerned with the numerical approximation of Cauchy problems for one-dimensional hyperbolic nonconservative systems. Some particular cases of P.D.E. systems which can be considered as particular cases of the nonconservative systems that we study are systems of conservation laws, systems of conservation laws with source term or balance laws and coupled systems of conservation laws ...
ظرفیت خودپالایی رودخانهها تابع عوامل زمانی و مکانی، نوع و شدت بار آلایندههای ورودی و نیز شرایط محیطی بستر رودخانه است. در حقیقت، ارزیابی خودپالایی رودخانه تعیین مقدار اکسیژن محلول در طول آن است که بر اساس این ظرفیت میتوان دریافت رودخانه از لحاظ آلودگی در چه وضعیتی است و در چه نقاطی وضعیت بحرانی کمبود اکسیژن محلول وجود دارد. از طرف دیگر، برایتعیینعکسالعملقابلانتظاررودخانهبهورودآلایندهها و...
We study the bosonic super Liouville system which is a statistical transmuta-tion of super Liouville system. Lax pair for the bosonic super Liouville system is constructed using prolongation method, ensuring the Lax integrability, and the solution to the equations of motion is also considered via Leznov-Saveliev analysis.
In this paper we investigate the performance of the weighted essential non-oscillatory (WENO) methods based on different numerical fluxes, with the objective of obtaining better performance for the shallow water equations by choosing suitable numerical fluxes. We consider six numerical fluxes, i.e., Lax-Friedrichs, local Lax-Friedrichs, Engquist-Osher, Harten-Lax-van Leer, HLLC and the first-or...
AIMS The planimetry method using three-dimensional (3D) echocardiography is useful for providing an accurate mitral annulus area (MAA) value. However, this method is relatively unavailable. Therefore, we evaluated the accuracy of conventional methods for MAA measurement compared with that of 3D planimetry. METHODS AND RESULTS Two-dimensional (2D) and 3D transoesophageal echocardiography (TEE)...
Lax pairs are useful in studying nonlinear partial differential equations, although finding them is often difficult. A standard approach for finding them was developed by Wahlquist and Estabrook [1]. It was designed to apply to for equations with two independent variables and generally produces incomplete Lie algebras (called “prolongation structures”), which can be written as relations among c...
The purpose of this paper is to develop a high-order shock-capturing scheme capable predicting flows where shock waves with high-temperature jumps interact multi-component real gas mixtures, assuming local thermodynamic equilibrium. We first propose generalization the Roe solver for distinct species non-ideal properties that relies on original method proposed by Vinokur & Montagné [1]. This use...
Numerical schemes for the solution of Euler equations have recently been developed, which involve discretisation internal energy equation, with corrective terms to ensure correct capture shocks, and, more generally, consistency in Lax-Wendroff sense. These may be staggered or colocated, using either structured meshes general simplicial tetrahedral/hexahedral meshes. The time discretization is p...
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