To display the Equation View node under all nodes creating variables, click the Show More Options button () and select Equation View in the Show More Options dialog box. See also Equation View.
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If Spherical is selected, enter the position of the center of the spherical geometry in the Center coordinate table. For axisymmetric models, only the z coordinate is required since the geometry must be centered on the axis.
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If Cylindrical is selected, enter the position of a point on the cylinder axis in the Center coordinate table. For 3D models, also enter a Center axis direction vector.
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If User defined is selected, first choose the Number of stretching directions appropriate for the geometrical configuration. Then for each stretching direction specify a Distance function, evaluating to the distance from the inner boundary of the absorbing layer measured in the stretching direction, and the Thickness of the domain in the same direction.
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Gaussian Pulse in 2D Uniform Flow: Convected Wave Equation and Absorbing Layers: Application Library path Acoustics_Module/Tutorials,_Pressure_Acoustics/gaussian_pulse_absorbing_layers
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