Navier-Stokes equation

Navier-Stokes equation, in fluid mechanics, a partial differential equation describing the flow of incompressible fluids. The equation is a generalization of one devised by Swiss mathematician Leonhard Euler in the 18th century to describe the flow of incompressible and frictionless fluids. In 1821 French engineer Claude-Louis Navier introduced the element of viscosity (friction) for the more realistic and vastly more difficult problem of viscous fluids. Throughout the middle of the 19th century, British physicist and...