Uppsala University Department of Information Technology

Technical Report 2003-032

Impedance Boundary Conditions for Acoustic Waves in a Duct with a Step Discontinuity

Daniel Noreland

May 2003

This paper treats the use of numerically computed impedance boundary conditions for acoustic simulations. Such boundary conditions may be used to combine different methods on different parts of the computational domain. Impedance boundary conditions may be computed for each subproblem independently of each other. In order to develop insight into this approach, wave propagation in a rectangular waveguide with a step discontinuity is studied.

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Uppsala Universitet