A vorticity-based mixed formulation for the unsteady Brinkman–Forchheimer equations
A vorticity-based mixed formulation for the unsteady Brinkman–Forchheimer equations
复制标题
非定常 Brinkman-Forchheimer 方程的基于涡度的混合公式
DOI:
10.1016/j.cma.2022.115829
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发表时间:
2023
影响因子:
7.2
通讯作者:
Yotov, Ivan
中科院分区:
文献类型:
--
作者:
Anaya, Verónica;Caraballo, Ruben;Caucao, Sergio;Gatica, Luis F.;Ruiz-Baier, Ricardo;Yotov, Ivan
We propose and analyze an augmented mixed formulation for the time-dependent Brinkman–Forchheimer equations written in terms of vorticity, velocity and pressure. The weak formulation is based on the introduction of suitable least squares terms arising from the incompressibility condition and the constitutive equation relating the vorticity and velocity. We establish existence and uniqueness of a solution to the weak formulation, and derive the corresponding stability bounds, employing classical results on nonlinear monotone operators. We then propose a semidiscrete continuous-in-time approximation based on stable Stokes elements for the velocity and pressure, and continuous or discontinuous piecewise polynomial spaces for the vorticity. In addition, by means of the backward Euler time discretization, we introduce a fully discrete finite element scheme. We prove well-posedness and derive the stability bounds for both schemes, and establish the corresponding error estimates. We provide several numerical results verifying the theoretical rates of convergence and illustrating the performance and flexibility of the method for a range of domain configurations and model parameters.
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DOI:
10.1016/j.cma.2022.114895
发表时间:
2022-05
影响因子:
7.2
作者:
Sergio Caucao;Ricardo Oyarzúa;Segundo Villa-Fuentes;I. Yotov
通讯作者:
Sergio Caucao;Ricardo Oyarzúa;Segundo Villa-Fuentes;I. Yotov
影响因子:
2
作者:
C. Carstensen;S. Sauter
通讯作者:
S. Sauter
DOI:
--
发表时间:
2019
期刊:
Comptes rendus. Mathematique
影响因子:
--
作者:
Verónica Anaya;Bryan G'omez;D. Mora;R. Ruiz
通讯作者:
R. Ruiz
影响因子:
1.7
作者:
Verónica Anaya;Ruben Caraballo;Bryan Gomez;D. Mora;R. Ruiz
通讯作者:
R. Ruiz
DOI:
--
发表时间:
2021
期刊:
ESAIM: Mathematical Modelling and Numerical Analysis
影响因子:
--
作者:
Sergio Caucao;G. Gatica;J. Ortega
通讯作者:
J. Ortega