What is fluid

When the density of the fluid remains invariant with the application of external force, it is said to be incompressible fluid. Compressible Fluid. When the density of the fluid varies with the application of external force, it is a compressible fluid. A very common fact about fluids is that they have a constant volume, meaning that they confine within the vessel they are kept in.

A fluid that is a liquid has the following properties. After cooling liquids, we can compress them, except for ice, which expands. We cannot compress water. Liquids have three forms. The liquid form of fluid is a prerequisite of carbon-based life. Most of the water present on the earth is from outer space. Cats release a lot of fluid in the saliva. Fluid mechanics is the study of the forces on the fluid and how fluids move. In the uppermost migmatites, where they are widespread, they involved infiltration of aqueous fluids from an external source.

The fluids would also have contributed to the dolomitized matrix which constitutes part of the breccia. The role of fluids in metamorphism, ultra-high pressure and temperature metamorphism are not adequately covered, for example. Thus, fluids associated with subduction may have been responsible for triggering partial melting of lithosphere already experiencing decompression as a result of extension.

See all examples of fluid. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Collocations with fluid. Click on a collocation to see more examples of it.

See all collocations with fluid. Translations of fluid in Chinese Traditional. See more. Need a translator? Translator tool. What is the pronunciation of fluid? Browse fluffiness. Test your vocabulary with our fun image quizzes. Image credits. There are two economies, above ground and underground, and the boundaries at times seem fluid. It separates into three layers upon standing—a brown deposit, a clear fluid , and a frothy layer.

One frequently wishes to ascertain the specific gravity of quantities of fluid too small to float an urinometer. This fluid is then heated, adding crystals of sodium acetate until it becomes perfectly clear. The clear, straw-colored fluid which is left after separation of the coagulum is called blood-serum.

Leukocytes are easily distinguished from red cells, especially when Toisson's diluting fluid is used. In physics , a substance that flows — usually a liquid or a gas. Because the atoms are closely packed, liquids, like solids, resist compression. Atoms in gases are separated by distances that are large compared with the size of the atoms. The forces between gas atoms are therefore very weak, except when the atoms collide with one another.

Gases thus not only flow and are therefore considered to be fluids but they are relatively easy to compress because there is much space and little force between atoms. When placed in an open container gases, unlike liquids, will escape. The major distinction is that gases are easily compressed, whereas liquids are not. We shall generally refer to both gases and liquids simply as fluids , and make a distinction between them only when they behave differently.

Skip to main content. Fluid Statics. Search for:. What Is a Fluid? Learning Objectives By the end of this section, you will be able to: State the common phases of matter.