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- W2025853198 abstract "We consider a controllability method for the time-periodic solution of the two-dimensional scalar wave equation with a first order absorbing boundary condition describing the scattering of a time-harmonic incident wave by a sound-soft obstacle. Solution of the time-harmonic equation is equivalent to finding a periodic solution for the corresponding time-dependent wave equation. We formulate the problem as an exact controllability one and solve the wave equation in time-domain. In a mixed formulation we look for solutions u = (v, p) T . The use of mixed formulation allows us to set the related controllability problem in (L 2 (Ω)) d+1 , a space of square-integrable functions in dimension d + 1. No preconditioning is needed when solving this with conjugate gradient method. We present numerical results concerning performance and convergence properties of the method." @default.
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- W2025853198 date "2011-12-01" @default.
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- W2025853198 title "SOLUTION OF TIME-PERIODIC WAVE EQUATION USING MIXED FINITE ELEMENTS AND CONTROLLABILITY TECHNIQUES" @default.
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- W2025853198 doi "https://doi.org/10.1142/s0218396x11004377" @default.
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