fig10.htm

Figure 10. Phase portrait characterizing the situation described by equation (C.17b), 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 characterizes the case when no external surface forces are present at this boundary. Trajectories filling the space between the circular and limiting trajectories (boundary points of the latter are shown by the broken line) also correspond to the absence of surface forces at the boundary. Trajectories filling the space between the limiting trajectory and separatrices correspond to the case when surface forces are present at the boundary Gmax.


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