In this paper a macroscopic model for porous media in oscillating flow is derived for CFD applications. In non -linear modelling of thermoacoustic devices, their cores, useful for the energy conversion, cannot be, in general, modelled like a traditional porous media through friction factor and Nusselt number correlations, recovered from steady state. In this work the analytical solutions in the frequency domain of the linearized Navier-Stokes equations are spatially averaged for an oscillating flow between parallel plates case to build a macroscopic model of an equivalent porous media through a complex permeability and Nusselt number. The results, obtained by assuming a zero mean temperature gradient, show that there is a good agreement between macroscopic solution of a porous box (representing a parallel plates stack) and the average of the solutions of oscillating flow between parallel plates, both in terms of temperature and velocity fields.

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Peter Coebergh departs Brill as CEOBrill, the international academic publisher, announces today that Peter Coebergh will leave Brill as CEO when his term of office will come to an end after the annual general meeting of shareholders that is currently scheduled for 25 May, 2022.Peter Coebergh (1961) joined Brill in 2015 and held the position of EVP Marketing & Sales before being appointed as CEO in 2018. Prior to joining Brill, Peter held several senior executive positions at Springer Science & Business Media (now Springer Nature), which he joined in 2001.Brill is grateful to Peter Coebergh for successfully leading the company over the past four years. Under his leadership, Brill has further prepared itself for a continued positive development as a leading publisher in the field of humanities.