Axisymmetric solutions to coupled Navier-Stokes/Allen-Cahn equations. (English) Zbl 1203.35191
Summary: We investigate a family of axisymmetric solutions to a coupling of Navier-Stokes and Allen-Cahn equations in \(\mathbb{R}^3\). First, a one-dimensional system of equations is derived from the method of separation of variables, which approximates the three-dimensional system along its symmetry axis. Then based on them, by adding perturbation terms, we construct finite energy solutions to the three-dimensional system. We prove the global regularity of the constructed solutions in both large viscosity and small initial data cases. These solutions can be considered as perturbations near infinite-energy solutions.
MSC:
35Q35 | PDEs in connection with fluid mechanics |
35K55 | Nonlinear parabolic equations |
76D05 | Navier-Stokes equations for incompressible viscous fluids |
76D03 | Existence, uniqueness, and regularity theory for incompressible viscous fluids |