Force density

Force density

In fluid mechanics, the force density has the physical dimensions of force per unit volume. Force density is a vector field representing the flux density of the hydrostatic force within the bulk of a fluid. Force density is represented by the symbol f, and given by the following equation, where "P" is the pressure:

:mathbf{f} = abla P .

The net force on a differental volume element "dV" of the fluid is:

:dmathbf{F} = mathbf{f}dV

Thus, the force density at a point in a fluid, divided by the density, is the acceleration of the fluid at that point.


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • force density — jėgos tankis statusas T sritis Standartizacija ir metrologija apibrėžtis Apibrėžtį žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. force density vok. Kraftdichte, f rus. плотность силы, f pranc. densité de force, f …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • force density — jėgos tankis statusas T sritis fizika atitikmenys: angl. force density vok. Kraftdichte, f rus. плотность силы, f pranc. densité de force, f …   Fizikos terminų žodynas

  • Lorentz force density — Lorenco jėgos tankis statusas T sritis fizika atitikmenys: angl. Lorentz force density vok. Lorentzsche Kraftdichte, f rus. плотность силы Лорентца, f pranc. densité de force de Lorentz, f …   Fizikos terminų žodynas

  • magnetic force density — magnetinės jėgos tankis statusas T sritis fizika atitikmenys: angl. magnetic force density vok. magnetische Kraftdichte, f rus. плотность магнитной силы, f pranc. densité de force magnétique, f …   Fizikos terminų žodynas

  • electric force density — elektrinės jėgos tankis statusas T sritis fizika atitikmenys: angl. electric force density vok. elektrische Kraftdichte, f rus. плотность электрической силы, f pranc. densité de force électrique, f …   Fizikos terminų žodynas

  • Density (disambiguation) — Density and dense usually refer to a measure of how much of some entity is within a fixed amount of space. Types of density include: In physics, density of mass: Density, mass per volume Area density or surface density, mass over a (two… …   Wikipedia

  • Density altitude — Computation Chart. Density altitude is the altitude in the International Standard Atmosphere at which the air density would be equal to the actual air density at the place of observation, or, in other words, the height when measured in terms of… …   Wikipedia

  • Force field (chemistry) — In the context of molecular mechanics, a force field (also called a forcefield) refers to the functional form and parameter sets used to describe the potential energy of a system of particles (typically but not necessarily atoms). Force field… …   Wikipedia

  • Force-free magnetic field — A force free magnetic field is a type of field which arises as a special case from the magnetostatic equation in plasmas. This special case arises when the plasma pressure is so small, relative to the magnetic pressure, that the plasma pressure… …   Wikipedia

  • density current — Geol., Oceanog. See turbidity current. * * * Any current in either a liquid or a gas that is kept in motion by the force of gravity acting on small differences in density. A density difference can exist between two fluids or between different… …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”