Mach number

Mach number (M or Ma) (/mɑːk/; German: [max]) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. where: M is the local Mach number,u is the local flow velocity with respect to the boundaries (either internal, such as an object immersed in the flow, or external, like a channel), andc is the speed of sound in the medium, which in air varies with the square root of the thermodynamic temperature.

Mach number

Mach number (M or Ma) (/mɑːk/; German: [max]) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. where: M is the local Mach number,u is the local flow velocity with respect to the boundaries (either internal, such as an object immersed in the flow, or external, like a channel), andc is the speed of sound in the medium, which in air varies with the square root of the thermodynamic temperature.