Figure 7.

Non-zero amplitudes of flux and circulation associated with (a,b) the vortex component ${\tilde{\mathit{u}}}_{\text{V}}$, (c,d) straight-line tangential component ${\tilde{\mathit{u}}}_{\text{T}}$ and (e,f ) straight-line normal component ${\tilde{\mathit{u}}}_{\text{N}}$ in the first Brillouin zone. The value of the spinner constant $\tilde{\alpha }=0.5$ is the same as in figure 4. (Online version in colour.)