Constrains the direction of flow processes, dictating that entropy must remain constant (isentropic) or increase (as seen across shock waves). Thermodynamics and the Speed of Sound
The behavior of a compressible fluid is defined by five fundamental principles, expressed through a system of non-linear partial differential equations: The Dynamics and Thermodynamics of Compressible...
Describes the forces acting on the fluid, where pressure gradients and viscous effects dictate acceleration. Constrains the direction of flow processes, dictating that
These are thin regions of high irreversibility. Thermodynamically, a shock wave converts kinetic energy into internal energy (heat), resulting in a sharp entropy rise. Constrains the direction of flow processes
) is a thermodynamic property, defined as the square root of the partial derivative of pressure with respect to density at constant entropy ( In (