On the Landau-Levich problem for a viscoplastic fluid (2013)
AuthorsSweid M, Moyers-Gonzalez M, Wilson PL, Castelain C, Burghelea Tshow all
A systematic investigation of the Landau-Levich problem of a viscoplastic material (Carbopol 980 is presented). The validity of the Landau-Levich scaling is assessed via integral scale measurements of the width of the coating films thickness performed for various Carbopol concentrations in the presence and in the absence of wall slip. To gain a deeper insight into the physical origins of the experimentally observed deviations from the classical 2/3 scaling a full characterisation of the time resolved flow field around the moving solid is performed and the main differences of the viscoplastic flow patterns with respect to their Newtonian counterpart are highlighted. The experimental investigation is complemented by a preliminary asymptotic analysis performed within the framework of the Bingham model.
CitationSweid M, Moyers-Gonzalez M, Wilson PL, Castelain C, Burghelea T (2013). On the Landau-Levich problem for a viscoplastic fluid. Bordeaux, France: 21ème Congrès Français de Mécanique. 26/08/2013-30/08/2013.
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