fig1.zip: This zip file contains three folders of data for \Gamma=9, 50, and 110 to plot fig.1. Each folder has two data files namely QUIVER_time_30 and QUIVER_time_60 correspond to time t=30 and 60, respectively. To plot vorticity, position and velocities along the x-axis, y-axis, and corresponding vorticity are required. In QUIVER_time_* files, the first five columns are x-position, y-position, velocity along the x-axis (vx), velocity along the y-axis (vy), and vorticity. fig2.zip: fig2.zip folder has data file for time_1, time_5, time_8, time_10. Each time_* files contain five columns. They are as follows: Col-1: Serial number Col-2: x-position Col-3: y-position Col-4: velocity along the x-axis (vx) Col-5: velocity along the y-axis (vy) Plotting script is given insider the folder. fig3.zip: fig3.zip folder has STATE file for various initial velocity U0. Each STATE_* files contain five columns. They are as follows: Col-1: Serial number Col-2: x-position Col-3: y-position Col-4: velocity along the x-axis (vx) Col-5: velocity along the y-axis (vy) Plotting script is given insider the folder. fig4.zip: This zip file contains four folders of data for \kappa=0.5, 1.0, 2.0, and 5.0 to plot fig.4. Each folder has 151 data files, namely QUIVER_time_*, which corresponds to various times. To plot wave propagation, position, and velocities along the x-axis, the y-axis is required. In QUIVER_time_* files, the first five columns are x-position, y-position, velocity along the x-axis (vx), velocity along the y-axis (vy), and vorticity. fig5.txt: Data file has various rows. They are as follows: Row-1: Various \kappa values Row-2: Longitudinal sound speed Row-3: Transverse sound speed Row-4: Various \kappa values to plot CNLW for various initial velocities vs \kappa values Row-5 to 11: Speed of nonlinear wave CNLW for various initial velocities U0=0.1, 0.35, 0.75, 1.5, 2.5, 3.5, 5.0. fig6.txt: First and second rows correspond to Mach numbers and maximum amplitude of absolute value of nonlinear wave velocity along x-direction (vx), respectively.