Company C requests that the Study Group investigate the fundamental modelling of wave propagation through a material.
The material can be rigid or flexible, with transversely oriented periodically-spaced cylindrical holes (with possible range of hole diameters in the range 1 mm to 20 mm). The holes are filled with a (typically colloidal) non-Newtonian fluid, which may have a range of possible rheological properties. The total structure is sealed.
The questions of primary interest are: how does the wave transmission through the material (and reflection from it) depend upon:
Figure 1: Included to illustrate the impact of changing material concentration. The lower the y-axis measurement the better.