Defect-deferred correction method based on a subgrid artificial viscosity modeling

JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS

卷:497

Article

Aggul, Mustafa¹ 

[1] Hacettepe Univ, Dept Math, TR-06800 Ankara, Turkey

关键词: High Reynolds number;    Defect-correction;    Deferred-correction;    Subgrid artificial viscosity;    Variational multiscale;   

DOI  :  10.1016/j.jmaa.2020.124878

来源: Elsevier

【 摘 要 】

An alternative first step approximation based on subgrid artificial viscosity modeling (SAV) is proposed for defect-deferred correction method (DDC) for incompressible Navier-Stokes equation at high Reynolds number. This new approach not only preserves all qualifications of the conventional artificial viscosity (AV) based DDC, such as unconditional stability, high order of accuracy and so on, it has also shown its superiority over choosing AV approximation in the predictor step. Both theory and computational results presented in this paper illustrate that this alternative approach indeed increases the efficiency of the DDC method. (C) 2020 Elsevier Inc. All rights reserved.

【 授权许可】

Free