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. 2009 Mar 9;4(3):e4738. doi: 10.1371/journal.pone.0004738

Figure 6. (Color online) The spiral-turbulence (ST) state in the TNNP model with a square obstacle of side l = 22.5 mm at (54 mm, 22.5 mm) in a square simulation domain with L = 135 mm.

Figure 6

We start with the initial condition of Fig. 1(A); pseudocolor plots of V are shown in (A), (B), and (C) at 0.8, 2.4, and 4.8 s, respectively. (D) The local time series for V from a sample of 100000 iterations taken from the representative point (90 mm, 90 mm) after the removal of initial transients (the first 300000 iterations); and plots of (E) the inter-beat interval (IBI) versus the beat number n from a sample time series of 400000 iterations, and (F) the power spectrum of V obtained from a time series of length 200000 iterations (after the removal of initial transients in the first 200000 iterations); the non-periodic behavior of the IBI and the broad-band nature of the power spectrum are characteristic of the spiral-turbulence state.