## Newtonian fluid

A **Newtonian fluid** (named after Isaac Newton ) is a **fluid** whose stress versus strain rate curve is linear and passes through the origin . [ 1 ] [ 2 ] [ 3 ] The constant of proportionality is known as the viscosity . [ edit ] Definition A simple equation to describe **Newtonian fluid**

**wikipedia.org**| 2011/3/29 7:48:20

## Dark fluid

In astronomy and cosmology , dark **fluid** is an alternative theory to both dark matter and dark energy and attempts to explain both phenomena in a single framework. [ 1 ] Dark **fluid** proposes that dark matter and dark energy are not separate physical phenomena as previously thought, nor

**wikipedia.org**| 2011/8/31 10:51:46

## Generalized Newtonian fluid

A generalized **Newtonian fluid** is an idealized **fluid** for which the shear stress , τ , is a function of shear rate at the particular time, but not dependent upon the history of deformation. where: ∂ u /∂ y is the shear rate or the velocity gradient perpendicular to the plane

**wikipedia.org**| 2011/6/8 16:46:34

## Fluid dynamics

In physics , **fluid** dynamics is a sub-discipline of **fluid** mechanics that deals with **fluid** flow —the natural science of fluids ( liquids and gases ) in motion. It has several subdisciplines itself, including aerodynamics (the study of air and other gases in motion) and hydrodynamics

**wikipedia.org**| 2011/10/1 3:59:26

## Herschel–Bulkley fluid

The Herschel–Bulkley **fluid** is a generalized model of a non **Newtonian fluid** , in which the strain experienced by the **fluid** is related to the stress in a complicated, non-linear way. Three parameters characterize this relationship: the consistency k , the flow index n , and the yield

**wikipedia.org**| 2011/3/7 22:56:31