Not a physicist, but I think this paper used holographic principles to predict the minimum ratio of shear viscosity to volume density of entropy in fluids https

Not a physicist, but I think this paper used holographic principles to predict the minimum ratio of shear viscosity to volume density of entropy in fluids https://arxiv.org/pdf/hep-th/0405231 https://arxiv.org/pdf/hep-th/0405231