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Core-annular flow through a horizontal pipe: Hydrodynamic counterbalancing of buoyancy force on coreOoms, G. (author), Vuik, C. (author), Poesio, P. (author)A theoretical investigation has been made of core-annular flow: the flow of a high-viscosity liquid core surrounded by a low-viscosity liquid annular layer through a horizontal pipe. Special attention is paid to the question of how the buoyancy force on the core, caused by a density difference between the core and the annular layer, is...journal article 2007