fluid rest need distinguish total entropy static entropy always equal definition entropy commonly referred simply entropy see also fields study acoustic theory aerodynamics aeroelasticity aeronautics computational fluid dynamics flow measurement geophysical fluid dynamics hemodynamics hydraulics hydrology hydrostatics electrohydrodynamics magnetohydrodynamics quantum hydrodynamics mathematical equations concepts airy wave theory benjamin bona mahony equation boussinesq approximation water waves different types boundary conditions fluid dynamics helmholtz 's theorems kirchhoff equations knudsen equation manning equation mild slope equation morison equation navier stokes equations oseen flow
Natural science Physics Fluid dynamics