Input (grade 13): Entropy layer As Mach numbers increase, the entropy change across the shock also increases, which results in a strong entropy gradient and highly vortical flow that mixes with the boundary layer.
Output (grade 8): Entropy Layer As a plane goes faster and mach numbers go up, the entropy change across the shock also goes up. This results in a strong entropy gradient and highly vortical flow that mixes with the boundary layer.