Isogeometric analysis of acoustic scattering with perfectly matched layers (IGAPML)
Peer reviewed, Journal article
Published version
Date
2022Metadata
Show full item recordCollections
- Publikasjoner fra CRIStin - SINTEF AS [6009]
- SINTEF Digital [2568]
Original version
Computer Methods in Applied Mechanics and Engineering. 2022, 401, Part B, 115647. 10.1016/j.cma.2022.115647Abstract
The perfectly matched layer (PML) formulation is a prominent way of handling radiation problems in unbounded domain and has gained interest due to its simple implementation in finite element codes. However, its simplicity can be advanced further using the isogeometric framework. This work presents a spline based PML formulation which avoids additional coordinate transformation as the formulation is based on the same space in which the numerical solution is sought. The procedure can be automated for any convex artificial boundary. This removes restrictions on the domain construction using PML and can therefore reduce computational cost and improve mesh quality. The usage of spline basis functions with higher continuity also improves the accuracy of the PML-approximation and the numerical solution.