Article
Isogeometric boundary element analysis for thermoviscous acoustics (en)
* Presenting author
Abstract:
In the current work, a new numerical model is proposed to consider viscous and thermal dissipations in real fluids. The proposed model is based on isogeometric analysis (IGA) coupled with the boundary element analysis with viscothermal losses. For the lossy BEM, we refer to the recently published version using global coupling conditions and a Schur-complement for condensing the system formulation. The main objective of the proposed model is to benefit from IGA features, and model complex and irregular geometries such as metamaterials. Based on the results and conclusions in our previous research works, it is anticipated from the proposed model to use moderate degrees of freedom in order to obtain more accurate results than standard boundary element methods (BEM). The proposed model has the same characteristics of standard BEM, such as reducing the problem dimensionality by one, in addition to treating infinite domains easily by modelling only the domain boundaries without any truncation boundary at the far-field satisfying directly the Sommerfeld radiation condition.