A novel efficient segregated pressure-based algorithm for steady-state incompressible flow

Abstract

In order to enhance the calculation efficiency of steady-state incompressible fluid flow, based on the existing IDEAL (i.e. the inner doubly iterative efficient algorithm for linked equations) algorithm, a novel segregated pressure-based algorithm (named as IDEALC) has been developed in this paper. The novel algorithm inherits the superiorities of the original IDEAL algorithm and at the same time improves its potential shortcomings. The specific promotions of the IDEALC algorithm consist of three aspects, including the first approximation of the SIMPLE algorithm, the approach to solving the momentum equation and the second approximation of the SIMPLE algorithm. Detailed comparisons between the IDEAL and the IDEALC algorithms are carried out by three numerical experiments on structured collocated grids. The numerical results demonstrate that the IDEALC algorithm can accurately predict the information of the flow field and has substantial advantages over the IDEAL algorithm in terms of the efficiency because of the consistent property of the former. The superiority of the IDEALC algorithm over the IDEAL algorithm is especially remarkable when the time step multiplier gets a moderate value.

KEYWORDS:

• Calculation efficiency
• IDEAL
• IDEALC
• incompressible flow
• segregated pressure-based algorithm
• SIMPLE algorithm

Disclosure statement

The authors wish to confirm that there are no relevant financial or non-financial competing interests associated with this publication.

Funding

The authors acknowledge the financial support from the National Natural Science Foundation of China (Grants No. 51909024 and 52179060).

Data availability statement

The authors confirm that the data supporting the findings of this study are available within the article.