نتایج جستجو برای: lax wendroff method

تعداد نتایج: 1632728  

حسین بهشتی امیری صباح حمیدی, محمد جعفر کرمانی,

در این مقاله حل عددی جریان تراکم­پذیر، گذرا، غیر لزج، دو فاز و حدود صوت حاوی شوک مخلوط بخار و آب در یک نازل همگرا-واگرا با روش عددی Roe بررسی شد. برای گسسته­سازی مکانی و محاسبه خواص اصلی جریان در مرز المان‌ها این خواص با دقت مرتبه سوم Roe برون‌یابی شده است، هم­چنین انتگرال­گیری زمانی با استفاده از روشصریح دو مرحله‌ای لکس – وندرف[i] با دقت مرتبه دوم انجام شده است. برای ناحیه خشک (تک فاز)، خواص ا...

Journal: :Journal of Computational Physics 2023

Compact Approximate Taylor (CAT) methods for systems of conservation laws were introduced by Carrillo and Pares in 2019. These methods, based on a strategy that allows one to extend high-order Lax-Wendroff nonlinear without using the Cauchy-Kovalevskaya procedure, have arbitrary even order accuracy 2p use (2p + 1)-point stencils, where p is an positive integer. More recently 2021 Carrillo, Macc...

2017
Dan Ling Juan Cheng Chi-Wang Shu

We further investigate the high order positivity-preserving discontinuous Galerkin (DG) methods for linear hyperbolic and radiative transfer equations developed in [14]. The DG methods in [14] can maintain positivity and high order accuracy, but they rely both on the scaling limiter in [15] and a rotational limiter, the latter may alter cell averages of the unmodulated DG scheme, thereby affect...

We show that a recently introduced Lax pair of the Sawada-Kotera equation is nota new one but is trivially related to the known old Lax pair. Using the so-called trivialcompositions of the old Lax pairs with a differentially constrained arbitrary operators,we give some examples of trivial Lax pairs of KdV and Sawada-Kotera equations.

Journal: :J. Comput. Physics 2007
Ching-Shan Chou Chi-Wang Shu

In this paper, we propose a high order residual distribution conservative finite difference scheme for solving convection– diffusion equations on non-smooth Cartesian meshes. WENO (weighted essentially non-oscillatory) integration and linear interpolation for the derivatives are used to compute the numerical fluxes based on the point values of the solution. The objective is to obtain a high ord...

1997
CHONGAM KIM KUN XU LUIGI MARTINELLI ANTONY JAMESON

Gas-kinetic schemes based on the BGK model are proposed as an alternative evolution model which can cure some of the limitations of current Riemann solvers. To analyse the schemes, simple advection equations are reconstructed and solved using the gas-kinetic BGK model. Results for gas-dynamic application are also presented. The ®nal ̄ux function derived in this model is a combination of a gas-ki...

Journal: :ESAIM: Mathematical Modelling and Numerical Analysis 2004

Given a pseudomonad $mathcal{T} $ on a $2$-category $mathfrak{B} $, if a right biadjoint $mathfrak{A}tomathfrak{B} $ has a lifting to the pseudoalgebras $mathfrak{A}tomathsf{Ps}textrm{-}mathcal{T}textrm{-}mathsf{Alg} $ then this lifting is also right biadjoint provided that $mathfrak{A} $ has codescent objects. In this paper, we give  general results on lifting of biadjoints. As a consequence, ...

Journal: :bulletin of the iranian mathematical society 0
d. talati sama technical and vocational training college, islamic azad university, urmia branch, urmia, iran.

we show that a recently introduced lax pair of the sawada-kotera equation is nota new one but is trivially related to the known old lax pair. using the so-called trivialcompositions of the old lax pairs with a differentially constrained arbitrary operators,we give some examples of trivial lax pairs of kdv and sawada-kotera equations.

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