Figure 9.

Comparison of two arrangement cases (n = m = 5 and n = 3, m = 7) with identical number of HRs and connection tube length L_d: (a) two different arrangements with same $L_d=3\times 0.5{\lambda }_0$; (b) two different arrangements with same $L_d=10\times 0.5{\lambda }_0$; (c) two different arrangements with same $L_d=3.3\times 0.5{\lambda }_0$.