A Numerical Method for Predicting Acoustical Wave Propagation in Open Spaces

Table 4

Numerical details for Case  3.

cylinder diameter:	𝐷=1
domain origins:	[𝑟,𝜃]=[1/2,0]×[8,𝜋]
initial condition:	𝑝′(𝑥,𝑦,0)=𝑒^(−ln2/0.04)((𝑥−4)2+𝑦2)
absorbing BC:	(18)
wave speed:	𝑐0=1
solid body BC:	(27), (44)–(47)
Nodes  𝑁𝐼×𝑁𝐽, 𝑑𝑟×𝑑𝜃	401×181, 0.025×0.0174
time step 𝑑𝑡:	0.05
CFL (based on 𝑑𝑟):	0.2
filtering:	8th order, every 10 time steps