Collisional multispecies drift fluid model

Transport in the edge and scrape-off layer mediated by turbulent fluctuations is oftenstudied using drift fluid models. In this work, we expand previous work on a two-fluidsingle ion species drift model to a multi-ion-species model that incorporates collisionalinteractions between the individual species while conserving energy. The model issimplified into a set of equations that are computationally realizable. This is used tostudy the dependency of seeded blob propagation on different mixes of deuterium andtritium isotopes in the background and blob, respectively. We find that the background mixis initially the dominant driver that determines propagation, but the blob mix becomes thedominating factor for continued evolution. It is found that the maximum velocity of theblob scales stronger with the initial blob mix than the background mix.Transport in the edge and scrape-off layer mediated by turbulent fluctuations is oftenstudied using drift fluid models. In this work, we expand previous work on a two-fluidsingle ion species drift model to a multi-ion-species model that incorporates collisionalinteractions between the individual species while conserving energy. The model issimplified into a set of equations that are computationally realizable. This is used tostudy the dependency of seeded blob propagation on different mixes of deuterium andtritium isotopes in the background and blob, respectively. We find that the background mixis initially the dominant driver that determines propagation, but the blob mix becomes thedominating factor for continued evolution. It is found that the maximum velocity of theblob scales stronger with the initial blob mix than the background mix.