Table 1 Liner configurations. The length of the liner is \(L=60~\text{mm}\). The value of the viscosity is \(\nu(\delta) = 1.4660 \times10^{-5}~\text{m}^{2}\mbox{/}\text{s}\). For all these configurations \(b=0.5\sqrt{ \mathrm {a}}\)

Config.

Number of holes (longitudinal, azimuthal)

Longitudinal inter-hole distance \(\delta/ \sqrt{ \mathrm {a}}\) (mm)

Azimuthal inter-hole distance \(\sqrt{ \mathrm {a}} \delta\) (mm)

Hole diameter \(\mathrm {d}_{0} \delta^{2}\) (mm)

Liner thickness \(\mathrm {h}_{0} \delta^{2}\) (mm)

σ %