2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128906The LBV/WR system HD 5980 contains a short-period, eccentric binary system with interacting stellar winds. In this paper we summarize results from model calculations of the tidal flows on the LBV component showing that energy dissipation rates, E-dot, associated with turbulent viscosity are orbital-phase dependent as well as variable over the stellar surface. We speculate that if E-dot contributes towards driving mass-loss, the strongest wind-wind interaction effects may occur after periastron passage. In addition, the model suggests the presence of stronger outflows localized at polar angles theta~30 --50 degrees during part of the orbital cycle. Thus, the analysis of wind-wind interactions in this system requires that models be revised to incorporate non-stationary and asymmetric wind structures.Presented in : `` Massive stars: fundamental parameters and circumstellar interactions", conference in honour of Virpi Niemela's 70th birthday; 5 pages, 3 figuresAstrophysicstext