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We prove global existence of appropriate weak solutions for the compressible Navier–Stokes equations for a more general stress tensor than those previously covered by P.-L.Lions and E. Feireisl’s theory. More precisely we focus on more general pressure laws that are not thermodynamically stable; we are also able to handle some anisotropy in the viscous stress tensor. To give answers to these two longstanding problems, we revisit the classical compactness theory on the density by obtaining precise quantitative regularity estimates: This requires a more precise analysis of the structure of the equations combined to a novel approach to the compactness of the continuity equation. These two cases open the theory to important physical applications, for instance to describe solar events (virial pressure law), geophysical flows (eddy viscosity) or biological situations (anisotropy).
Didier Bresch 1 ; Pierre--Emmanuel Jabin 2
@article{10_4007_annals_2018_188_2_4, author = {Didier Bresch and Pierre--Emmanuel Jabin}, title = {Global existence of weak solutions for compressible {Navier{\textendash}Stokes} equations: {Thermodynamically} unstable pressure and anisotropic viscous stress tensor}, journal = {Annals of mathematics}, pages = {577--684}, publisher = {mathdoc}, volume = {188}, number = {2}, year = {2018}, doi = {10.4007/annals.2018.188.2.4}, mrnumber = {3862947}, zbl = {06921187}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2018.188.2.4/} }
TY - JOUR AU - Didier Bresch AU - Pierre--Emmanuel Jabin TI - Global existence of weak solutions for compressible Navier–Stokes equations: Thermodynamically unstable pressure and anisotropic viscous stress tensor JO - Annals of mathematics PY - 2018 SP - 577 EP - 684 VL - 188 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4007/annals.2018.188.2.4/ DO - 10.4007/annals.2018.188.2.4 LA - en ID - 10_4007_annals_2018_188_2_4 ER -
%0 Journal Article %A Didier Bresch %A Pierre--Emmanuel Jabin %T Global existence of weak solutions for compressible Navier–Stokes equations: Thermodynamically unstable pressure and anisotropic viscous stress tensor %J Annals of mathematics %D 2018 %P 577-684 %V 188 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2018.188.2.4/ %R 10.4007/annals.2018.188.2.4 %G en %F 10_4007_annals_2018_188_2_4
Didier Bresch; Pierre--Emmanuel Jabin. Global existence of weak solutions for compressible Navier–Stokes equations: Thermodynamically unstable pressure and anisotropic viscous stress tensor. Annals of mathematics, Tome 188 (2018) no. 2, pp. 577-684. doi: 10.4007/annals.2018.188.2.4
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