Distribution of normalized pressure across the y-axis (lateral to jet propagation), indicating pressure variation within the lobe, immediate surroundings, and unperturbed ambient medium. The variation is shown at the position of maximum lobe width along the y-axis. The left and right panels represent the same situation for different runs. However, in the right panel, the computational domain is almost entirely occupied by the lobe material in the lateral direction. So, we use the ambient medium pressure values from the unperturbed initial condition for a tentative representation.