This study provides the analysis of the generalized 3D Stokes problem in a time dependent domain, modeling a solid in motion. The fluid viscosity is a non-linear function of the shear-rate and depends on a transported and diffused quantity. This is a natural model of flow at very low Reynolds numbers, typically at the microscale, involving a miscible, heterogeneous and shear-thinning incompressible fluid filling a complex geometry in motion. This one-way coupling is meaningful when the action produced by a solid in motion has a dominant effect on the fluid. Several mathematical aspects are developed. The penalized version of this problem is introduced, involving the penalization of the solid in a deformable motion but defined in a simple geometry (a periodic domain and/or between planes), which is of crucial interest for many numerical methods. All the equations of this partial differential system are analyzed separately, and then the coupled model is shown to be well-posed and to converge toward the solution of the initial problem. In order to illustrate the pertinence of such models, two meaningful micrometer scale real-life problems are presented: on the one hand, the dynamics of a polymer percolating the pores of a real rock and miscible in water; on the other hand, the dynamics of the strongly heterogeneous mucus bio-film, covering the human lungs surface, propelled by the vibrating ciliated cells. For both these examples the mathematical hypothesis are satisfied.
Accepté le :
DOI : 10.1051/m2an/2019013
Mots-clés : Stokes equations, rheology. shear-thinning, moving geometry, variable viscosity flows, porous media, biomechanics
@article{M2AN_2019__53_4_1083_0, author = {Sanchez, David and Hume, Laur\`ene and Chatelin, Robin and Poncet, Philippe}, title = {Analysis of the {3D} non-linear {Stokes} problem coupled to transport-diffusion for shear-thinning heterogeneous microscale flows, applications to digital rock physics and mucociliary clearance}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis }, pages = {1083--1124}, publisher = {EDP-Sciences}, volume = {53}, number = {4}, year = {2019}, doi = {10.1051/m2an/2019013}, zbl = {1428.35312}, mrnumber = {3977079}, language = {en}, url = {http://www.numdam.org/articles/10.1051/m2an/2019013/} }
TY - JOUR AU - Sanchez, David AU - Hume, Laurène AU - Chatelin, Robin AU - Poncet, Philippe TI - Analysis of the 3D non-linear Stokes problem coupled to transport-diffusion for shear-thinning heterogeneous microscale flows, applications to digital rock physics and mucociliary clearance JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2019 SP - 1083 EP - 1124 VL - 53 IS - 4 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an/2019013/ DO - 10.1051/m2an/2019013 LA - en ID - M2AN_2019__53_4_1083_0 ER -
%0 Journal Article %A Sanchez, David %A Hume, Laurène %A Chatelin, Robin %A Poncet, Philippe %T Analysis of the 3D non-linear Stokes problem coupled to transport-diffusion for shear-thinning heterogeneous microscale flows, applications to digital rock physics and mucociliary clearance %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2019 %P 1083-1124 %V 53 %N 4 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an/2019013/ %R 10.1051/m2an/2019013 %G en %F M2AN_2019__53_4_1083_0
Sanchez, David; Hume, Laurène; Chatelin, Robin; Poncet, Philippe. Analysis of the 3D non-linear Stokes problem coupled to transport-diffusion for shear-thinning heterogeneous microscale flows, applications to digital rock physics and mucociliary clearance. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 53 (2019) no. 4, pp. 1083-1124. doi : 10.1051/m2an/2019013. http://www.numdam.org/articles/10.1051/m2an/2019013/
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