International Scholarly Research Notices

Research Article

A Numerical Method for Predicting Acoustical Wave Propagation in Open Spaces

Table 3

Numerical details for Case  2.
domain origins: [ − 2 0 0 2 0 0 ] × [ − 2 0 0 2 0 0 ]
initial conditions:at 𝑡 = 0 , 𝑝 ′ ( 𝑥 , 𝑦 ) = 0
source term: 𝑆 ( 𝑥 , 𝑦 ) = 𝑝 i n c 𝑡 𝑡 only in [ − 1 0 0 1 0 0 ] × [ − 1 0 0 1 0 0 ] cut off for 𝑟 / 𝑟 0 ≤ 1 . 5
wave speed: 𝑐 0 = 1
circulation intensity: Γ = 1 . 0 0 5 3 1
vortex distance: 𝑟 0 = 1
rotating speed and wavelength: 𝜔 = 0 . 0 8 , 𝜆 = 1 2 . 5
rotating Mach number: 𝑀 𝑟 = 0 . 0 7 9 6
Nodes   𝑁 𝐼 × 𝑁 𝐽 , 𝑑 𝑥 × 𝑑 𝑦 2 5 1 × 2 5 1 , 1 . 6 × 1 . 6
time step 𝑑 𝑡 :0.5
CFL:0.3125
nodes per wave length:22-23
filtering:None