Extended Stokes' First Problem of an Oldroyd-B Fluid for Relatively Moving Half-Planes

Figure 4

Velocity developments at 𝑧=0.01 (solid) and 𝑧=−0.01 (dashed) for the cases of 𝜆=1,2, and 4 at the level 𝑦=0.1. The fixed retardation time is 𝜆_𝑟=1.