Fig. 6: Numerical simulations of the two PDCs.
From: Unraveling pyroclastic density current dynamics with multiparameter geophysical sensing
Snapshots of the simulations that best match the observed front velocities of PDC1 (a–c) and PDC2 (d–f). We consider friction angles δ1 = 27° and δ2 = 21°, respectively. a, d show the initial location of the flow mass with colours representing its thickness. b, c, e, f show the propagation of PDC1 and PDC2 at different time intervals, compared with real observations. The colours in (a, b) and (e, f) indicate the flow velocity.
