Density is related to temperature and pressure

dynamic viscosity

kinematic viscosity

Compressibility

Expansion

Vaporization and cavitation

Surface tension and capillarity

gravity

inertial force

Electromagnetic force

normal force

Tangential force

The size of any point in a stationary fluid has nothing to do with the orientation of the action surface

The hydrostatic pressure is perpendicular to the action surface and points in the direction of the inner normal of the action surface.

general form

absolutely still

relatively still

local acceleration

Migration acceleration

Streamlines do not intersect (except at stationary points and singular points) and are smooth curves

Streamlines fill Liuchang

Steady flow, the streamline shape and position do not change with time

Steady flow, streamlines and traces coincide

Velocity head, pressure head, position head, pressure tube head, total head, total pressure

Ideal fluid, steady flow, mass force, incompressible fluid, along a streamline

The manifestation of the law of conservation of mechanical energy in fluid mechanics

Velocity head, pressure head, position head, pressure tube head, total head, total pressure

upper critical Reynolds number

lower critical Reynolds number

Resistance coefficient along the way

Reynolds number

Froude number

Strouhal number

Euler number

basic dimensions

Derive dimensions. ． :

Commonly used dimensions

Index method

Big school method