Numerical Simulation of Unsteady Compressible Flow in Convergent Channel: Pressure Spectral Analysis

Figure 4

The initial condition computed in 𝐷₁---𝑀_∞=0.012, Re_∞=4481, 𝑝₂=1/𝜅, 450×100 cells, and 𝑀_max=0.177 (𝑢̂_max=60.7ms⁻¹).

(a) The velocity flow field mapped by isolines of Mach number

(b) Convergence to the steady-state solution using 𝐿₂ norm of momentum residuals (ρu)