fig09.htm

Figure 9. Phase portrait corresponding to the situation described by equation (C.17a), with the inner boundary Gmax separating the poroviscous region and suspension at f = fmax. The wave velocity is positive. Two singular points (saddle and center) exist in this case. The circular trajectory tangent to the right-hand boundary Gmax corresponds to the case when no surface forces are present at this boundary. Trajectories filling the space between this circular trajectory and separatrices correspond to the case when external surface forces are present at the boundary Gmax.


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