Time-Splitting Procedures for the Numerical Solution of the 2D Advection-Diffusion Equation

Figure 7

Plots of modulus of amplification factor versus phase angle in 𝑥-direction (𝜔_𝑥) versus phase angle in 𝑦-direction (𝜔_𝑦), at ℎ=0.025 for some different values of 𝑘 for the LOD (1,5) procedure.

(a) ℎ=0.025,𝑘=0.005

(b) ℎ=0.025,𝑘=0.01

(c) ℎ=0.025,𝑘=0.02

(d) ℎ=0.025,𝑘=0.025