Fluid statics

The fluid static within the fluid mechanics the theory of the behavior of the fluids , the approximate static are so are at rest and no motion / flow run ( speed = 0). In contrast to solids, fluids offer little resistance to slow changes in shape that occur without changes in volume. The slower the change in shape, the smaller it is. Since the displacement of the fluid elements relative to one another depends on the acting tangential forces, these changes in shape are small up to sufficiently slow and zero in the rest state. There are therefore no tangential stresses in fluids at rest.

The counterpart for moving / flowing fluids is fluid dynamics .

Depending on the type of fluid, the fluid statics is further subdivided into:

• Hydrostatics for incompressible fluids ( liquids )

Note: Sometimes hydrostatics is used synonymously with fluid statics .

• Aerostatics for compressible fluids ( gases ), especially air

Central contents of the fluid statics are the characteristics of the static pressure , the forces on the container walls and on bodies in the fluid, in particular the static buoyancy , as well as the formation of interfaces .

literature

• Herbert Sigloch: Technical fluid mechanics . Springer, Berlin / Heidelberg 2008, ISBN 978-3-540-44633-0 .
• Leopold Böswirth: Technical fluid mechanics . 6th edition. Vieweg + Teubner, 2005, ISBN 978-3-528-54925-1 .
• D. Bestle: Technical Mechanics III: Vibrations and Hydromechanics . Working documents for the lecture. Chair of Technical Mechanics and Vehicle Dynamics, Brandenburg University of Technology Cottbus, 2009 ( full text chapter 12 Fluid statics as PDF on www-docs.tu-cottbus.de).