Amplitude-phase decompositions and the growth and decay of solutions of the incompressible Navier-Stokes and Euler equations

作者：Hughes Thomas J R^*

来源：Mathematical Models and Methods in Applied Sciences, 2014, 24(5): 1017-1035.

DOI：10.1142/S0218202513500759

• Navier-Stokes equations
• Euler equations
• incompressible flow
• amplitude-phase decompositions
• blow-up

We introduce the concept of amplitude-phase decompositions and apply it to the study of growth and decay of solutions of the incompressible Navier-Stokes and Euler equations. Amplitudes coincide with functionals of physical and mathematical interest. We are able to explicitly solve for the amplitudes in terms of the phases. The results obtained provide insights into the growth and decay of enstrophy and viscous dissipation, and identify new criteria for solutions to remain smooth for all time or blow-up

• 出版日期2014-5