When two miscible fluids, such as glycerol (glycerin) and water, are brought in contact, they immediately diffuse in each other. However if the diffusion is sufficiently slow, large concentration gradients exist during some time. They can lead to the appearance of an “effective interfacial tension”. To study these phenomena we use the mathematical model consisting of the diffusion equation with convective terms and of the Navier-Stokes equations with the Korteweg stress. We prove the global existence and uniqueness of the solution for the associated initial-boundary value problem in a two-dimensional bounded domain. We study the longtime behavior of the solution and show that it converges to the uniform composition distribution with zero velocity field. We also present numerical simulations of miscible drops and show how transient interfacial phenomena can change their shape.
Mots clés : miscible liquids, Korteweg stress, drops
@article{M2AN_2003__37_5_741_0, author = {Kostin, Ilya and Marion, Martine and Texier-Picard, Rozenn and Volpert, Vitaly A.}, title = {Modelling of miscible liquids with the {Korteweg} stress}, journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique}, pages = {741--753}, publisher = {EDP-Sciences}, volume = {37}, number = {5}, year = {2003}, doi = {10.1051/m2an:2003042}, mrnumber = {2020862}, language = {en}, url = {http://www.numdam.org/articles/10.1051/m2an:2003042/} }
TY - JOUR AU - Kostin, Ilya AU - Marion, Martine AU - Texier-Picard, Rozenn AU - Volpert, Vitaly A. TI - Modelling of miscible liquids with the Korteweg stress JO - ESAIM: Modélisation mathématique et analyse numérique PY - 2003 SP - 741 EP - 753 VL - 37 IS - 5 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an:2003042/ DO - 10.1051/m2an:2003042 LA - en ID - M2AN_2003__37_5_741_0 ER -
%0 Journal Article %A Kostin, Ilya %A Marion, Martine %A Texier-Picard, Rozenn %A Volpert, Vitaly A. %T Modelling of miscible liquids with the Korteweg stress %J ESAIM: Modélisation mathématique et analyse numérique %D 2003 %P 741-753 %V 37 %N 5 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an:2003042/ %R 10.1051/m2an:2003042 %G en %F M2AN_2003__37_5_741_0
Kostin, Ilya; Marion, Martine; Texier-Picard, Rozenn; Volpert, Vitaly A. Modelling of miscible liquids with the Korteweg stress. ESAIM: Modélisation mathématique et analyse numérique, Tome 37 (2003) no. 5, pp. 741-753. doi : 10.1051/m2an:2003042. http://www.numdam.org/articles/10.1051/m2an:2003042/
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