Abstract
The interaction of two parallel periodic wave trains in vertical conduits has been studied through a simple laboratory analog experiment, and it is described (at a low-Reynolds number≪1). The observations of the shape and the phase velocity of waves show that these wave characteristics are modified by their interactions. There are three modes of interaction of periodic wave trains: (1) in-phase slow periodic wave train mode; (2) in-phase fast periodic wave train mode and (3) out-of-phase fast periodic wave train mode. The geometry of the periodic wave trains and the normalized amplitudes of the wave train, A, control the mode. Each mode has a characteristic spatial and temporal distribution of waves as a result of the interaction of wave trains. These spatial and temporal variations generated by the interaction of wave trains may be observed in various magmatic activities, for instance, mid-ocean ridges, island arcs, and hotspots.
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