A Fast Regularized Boundary Integral Method for Practical Acoustic Problems
Z.Y. Qian, Z.D. Han1, S.N. Atluri1, 2
CMES-Computer Modeling in Engineering & Sciences, Vol.91, No.6, pp. 463-484, 2013, DOI:10.3970/cmes.2013.091.463
Abstract To predict the sound field in an acoustic problem, the well-known non-uniqueness problem has to be solved. In a departure from the common approaches used in the prior literature, the weak-form of the Helmholtz differential equation, in conjunction with vector test-functions, is utilized as the basis, in order to directly derive non-hyper-singular boundary integral equations for the velocity potential ∅, as well as its gradients q;. Both ∅-BIE and q-BIE are fully regularized to achieve weak singularities at the boundary [i.e., containing singularities of O(r-1)]. Collocation-based boundary-element numerical approaches [denoted as BEM-R-∅-BIE, and BEM-R-q-BIE] are implemented to More >
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