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Volume 14, Issue 3
A Hybrid Neural-Network and MAC Scheme for Stokes Interface Problems

Che-Chia Chang, Chen-Yang Dai, Wei-Fan Hu, Te-Sheng Lin & Ming-Chih Lai

East Asian J. Appl. Math., 14 (2024), pp. 490-506.

Published online: 2024-05

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  • Abstract

In this paper, we present a hybrid neural-network and MAC (Marker-And-Cell) scheme for solving Stokes equations with singular forces on an embedded interface in regular domains. As known, the solution variables (the pressure and velocity) exhibit non-smooth behaviors across the interface so extra discretization efforts must be paid near the interface in order to have small order of local truncation errors in finite difference schemes. The present hybrid approach avoids such additional difficulty. It combines the expressive power of neural networks with the convergence of finite difference schemes to ease the code implementation and to achieve good accuracy at the same time. The key idea is to decompose the solution into singular and regular parts. The neural network learning machinery incorporating the given jump conditions finds the singular part solution, while the standard MAC scheme is used to obtain the regular part solution with associated boundary conditions. The two- and three-dimensional numerical results show that the present hybrid method converges with second-order accuracy for the velocity and first-order accuracy for the pressure, and it is comparable with the traditional immersed interface method in literature.

  • AMS Subject Headings

35J25, 65N06, 68T07

  • Copyright

COPYRIGHT: © Global Science Press

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@Article{EAJAM-14-490, author = {Chang , Che-ChiaDai , Chen-YangHu , Wei-FanLin , Te-Sheng and Lai , Ming-Chih}, title = {A Hybrid Neural-Network and MAC Scheme for Stokes Interface Problems}, journal = {East Asian Journal on Applied Mathematics}, year = {2024}, volume = {14}, number = {3}, pages = {490--506}, abstract = {

In this paper, we present a hybrid neural-network and MAC (Marker-And-Cell) scheme for solving Stokes equations with singular forces on an embedded interface in regular domains. As known, the solution variables (the pressure and velocity) exhibit non-smooth behaviors across the interface so extra discretization efforts must be paid near the interface in order to have small order of local truncation errors in finite difference schemes. The present hybrid approach avoids such additional difficulty. It combines the expressive power of neural networks with the convergence of finite difference schemes to ease the code implementation and to achieve good accuracy at the same time. The key idea is to decompose the solution into singular and regular parts. The neural network learning machinery incorporating the given jump conditions finds the singular part solution, while the standard MAC scheme is used to obtain the regular part solution with associated boundary conditions. The two- and three-dimensional numerical results show that the present hybrid method converges with second-order accuracy for the velocity and first-order accuracy for the pressure, and it is comparable with the traditional immersed interface method in literature.

}, issn = {2079-7370}, doi = {https://doi.org/10.4208/eajam.2024-006.060424}, url = {http://global-sci.org/intro/article_detail/eajam/23158.html} }
TY - JOUR T1 - A Hybrid Neural-Network and MAC Scheme for Stokes Interface Problems AU - Chang , Che-Chia AU - Dai , Chen-Yang AU - Hu , Wei-Fan AU - Lin , Te-Sheng AU - Lai , Ming-Chih JO - East Asian Journal on Applied Mathematics VL - 3 SP - 490 EP - 506 PY - 2024 DA - 2024/05 SN - 14 DO - http://doi.org/10.4208/eajam.2024-006.060424 UR - https://global-sci.org/intro/article_detail/eajam/23158.html KW - Stokes interface problems, neural networks, MAC scheme, hybrid method. AB -

In this paper, we present a hybrid neural-network and MAC (Marker-And-Cell) scheme for solving Stokes equations with singular forces on an embedded interface in regular domains. As known, the solution variables (the pressure and velocity) exhibit non-smooth behaviors across the interface so extra discretization efforts must be paid near the interface in order to have small order of local truncation errors in finite difference schemes. The present hybrid approach avoids such additional difficulty. It combines the expressive power of neural networks with the convergence of finite difference schemes to ease the code implementation and to achieve good accuracy at the same time. The key idea is to decompose the solution into singular and regular parts. The neural network learning machinery incorporating the given jump conditions finds the singular part solution, while the standard MAC scheme is used to obtain the regular part solution with associated boundary conditions. The two- and three-dimensional numerical results show that the present hybrid method converges with second-order accuracy for the velocity and first-order accuracy for the pressure, and it is comparable with the traditional immersed interface method in literature.

Chang , Che-ChiaDai , Chen-YangHu , Wei-FanLin , Te-Sheng and Lai , Ming-Chih. (2024). A Hybrid Neural-Network and MAC Scheme for Stokes Interface Problems. East Asian Journal on Applied Mathematics. 14 (3). 490-506. doi:10.4208/eajam.2024-006.060424
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