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Due to inability of controlling the foaming process, it is difficult to obtain the desired microscopic properties of the stochastic foams which governs the absorption performance of these materials. In this study we have designed periodic foam structures evolved from body centred cubic (BCC) unit cells developed by appropriate subtraction of equal-volume spheres from a unit cube. With this method, it is possible to control the microstructure of the periodic foam with just one parameters, viz., changing the radius of the sphere. Microscopic Johnson-Champoux-Allard (JCA) parameters (i.e. porosity, air flow resistivity, tortuosity, viscous characteristic length and thermal characteristic length) are predicted by solving Stokes and Laplace boundary value problem with appropriate boundary conditions. These JCA parameters are used to predict the sound absorption performance of periodic foam structure. Finally the periodic foams are 3D printed and their absorption behaviour is compared with the computational results. This study is extended for the different porosities and PPI (pores per inch) foams.
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