Artificial boundary conditions for two-dimensional equations of fluid dynamics. 1. Convective wave equation
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The article models external flow problems on artificially bounded regions. In the linear approximation we examine the reflection of acoustic waves in a moving medium, incident at various angles on a fixed boundary. We consider the construction of various boundary conditions and estimate their reflecting properties for plane waves and waves from point sources. The plane wave approximation is justified theoretically. A method is proposed for estimating the integral reflection coefficient for waves with a whole range of incidence angles.
KeywordsWave Equation Mach Number Plane Wave Incidence Angle Absorb Boundary Condition
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