What is the maximum solid phase concentration in volcanic turbulent gas-particle mixtures? Experimental observations and implications for natural flows

Anne Weit, Laboratoire Magmas et Volcans, Clermont-Ferrand Cedex, France, Olivier Roche, Laboratoire Magmas et Volcans - IRD, Aubière, France, Thierry Dubois, Laboratoire de Mathématiques Blaise Pascal, Aubière, France and Michael Manga, Univ of California Berkeley, Berkeley, CA, United States