Fluid is a fixed quality without fixed shape of objects,such as gas or liquid.
Fluid flow when there are two entirely different flow pattern - laminar flow (stranded) and turbulence (turbulence).In a state of fluid flow,fluid particles for linear motion,that is layered fluid flow,structured,mutual non-hybrid.When the fluid movement is at a turbulent state,in general,fluid forward movement along the pipeline,but also random in all directions on the pulse,this chaotic movement,fluid flow can be enhanced when the heat and mass transfer process.
Fluid in the most extensive use of the formula is Bernoulli's equation p + ρ gz + (1 / 2) * ρ v ^ 2 = C
At present fluid dynamics of the main elements of a campaign atmosphere,water sports (including waves,tides,in the scale vortex,circulation,etc.) and even the depths of the Earth,such as the flow of Rongjiang.