Ginzburg-Landau Model for Curved Two-Phase Shallow Mixing Layers

Method of multiple scales is used in the paper in order to derive an amplitude evolution equation for the most unstable mode from two-dimensional shallow water equations under the rigid-lid assumption. It is assumed that shallow mixing layer is slightly curved in the longitudinal direction and contains small particles. Dynamic interaction between carrier fluid and particles is neglected. It is shown that the evolution equation is the complex Ginzburg-Landau equation. Explicit formulas for the computation of the coefficients of the equation are obtained.

Authors:

• Irina Eglite
• Andrei A. Kolyshkin

Keywords:

• Shallow water equations
• mixing layer
• weakly nonlinear analysis
• Ginzburg-Landau equation

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