Long-term experiments on spiral interaction carried out in the framework of the Belousov- Zhabotinsky reaction have revealed the influence of the initial pattern symmetry on further pattern evolution. This symmetry is characterized by the different distance from each spiral tip to the boundary where the emitted wave fronts collide. The spiral initially closer to the shock line is observed to rotate with a lower mean frequency and to be dominated by the other one. Besides, both spiral tips are observed to drift. Different relationships between tangential and normal drift velocities of both tips have been found depending on whether domination is total or partial.
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Ruiz‐Villarreal et al. (1997) studied this question.
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