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- Fluid_parcel abstract "In fluid dynamics, within the framework of continuum mechanics, a fluid parcel is a very small amount of fluid, identifiable throughout its dynamic history while moving with the fluid flow. As it moves, the mass of a fluid parcel remains constant, while—in a compressible flow—its volume may change. And its shape changes due to the distortion by the flow. Note that in an incompressible flow the volume of the fluid parcel is also a constant (isochoric flow).This mathematical concept is closely related to the description of fluid motion—its kinematics and dynamics—in a Lagrangian frame of reference. In this reference frame, fluid parcels are labelled and followed through space and time. But also in the Eulerian frame of reference the notion of fluid parcels can be advantageous, for instance in defining the material derivative, streamlines, streaklines, and pathlines; or for determining the Stokes drift.The fluid parcels, as used in continuum mechanics, are to be distinguished from microscopic particles (molecules and atoms) in physics. Fluid parcels describe the average velocity and other properties of fluid particles, averaged over a length scale which is large compared to the mean free path, but small compared to the typical length scales of the specific flow under consideration. This requires the Knudsen number to be small, as is also a pre-requisite for the continuum hypothesis to be a valid one. Further note, that unlike the mathematical concept of a fluid parcel which can be uniquely identified—as well as exclusively distinguished from its direct neighbouring parcels—in a real fluid such a parcel would not always consist of the same particles. Molecular diffusion will slowly evolve the parcel properties.For air flow, the corresponding term is air parcel. Another name for fluid parcel is material element of fluid. Correspondingly, also the notions of material line and material surface can be introduced, always consisting of the same material elements and moving with the fluid flow. Yet another name used for fluid parcel is fluid element.".
- Fluid_parcel wikiPageID "475955".
- Fluid_parcel wikiPageLength "3822".
- Fluid_parcel wikiPageOutDegree "26".
- Fluid_parcel wikiPageRevisionID "661304813".
- Fluid_parcel wikiPageWikiLink Average.
- Fluid_parcel wikiPageWikiLink Category:Continuum_mechanics.
- Fluid_parcel wikiPageWikiLink Category:Fluid_dynamics.
- Fluid_parcel wikiPageWikiLink Compressible_flow.
- Fluid_parcel wikiPageWikiLink Continuum_mechanics.
- Fluid_parcel wikiPageWikiLink Dimensional_analysis.
- Fluid_parcel wikiPageWikiLink Dynamics_(mechanics).
- Fluid_parcel wikiPageWikiLink Dynamics_(physics).
- Fluid_parcel wikiPageWikiLink Fluid_dynamics.
- Fluid_parcel wikiPageWikiLink Fluid_flow.
- Fluid_parcel wikiPageWikiLink Incompressible_flow.
- Fluid_parcel wikiPageWikiLink Infinitesimal.
- Fluid_parcel wikiPageWikiLink Isochoric_process.
- Fluid_parcel wikiPageWikiLink Kinematics.
- Fluid_parcel wikiPageWikiLink Knudsen_number.
- Fluid_parcel wikiPageWikiLink Lagrangian_and_Eulerian_coordinates.
- Fluid_parcel wikiPageWikiLink Lagrangian_and_Eulerian_specification_of_the_flow_field.
- Fluid_parcel wikiPageWikiLink Length_scale.
- Fluid_parcel wikiPageWikiLink Mass.
- Fluid_parcel wikiPageWikiLink Material_derivative.
- Fluid_parcel wikiPageWikiLink Mathematics.
- Fluid_parcel wikiPageWikiLink Mean_free_path.
- Fluid_parcel wikiPageWikiLink Molecular_diffusion.
- Fluid_parcel wikiPageWikiLink Particle.
- Fluid_parcel wikiPageWikiLink Physics.
- Fluid_parcel wikiPageWikiLink Stokes_drift.
- Fluid_parcel wikiPageWikiLink Streamlines,_streaklines,_and_pathlines.
- Fluid_parcel wikiPageWikiLinkText "Fluid parcel".
- Fluid_parcel wikiPageWikiLinkText "air parcel".
- Fluid_parcel wikiPageWikiLinkText "element of fluid".
- Fluid_parcel wikiPageWikiLinkText "fluid elements".
- Fluid_parcel wikiPageWikiLinkText "fluid parcel".
- Fluid_parcel wikiPageWikiLinkText "parcel of fluid".
- Fluid_parcel wikiPageWikiLinkText "parcel".
- Fluid_parcel wikiPageWikiLinkText "parcels of fluids".
- Fluid_parcel wikiPageWikiLinkText "parcels".
- Fluid_parcel hasPhotoCollection Fluid_parcel.
- Fluid_parcel wikiPageUsesTemplate Template:Cite_book.
- Fluid_parcel wikiPageUsesTemplate Template:Reflist.
- Fluid_parcel subject Category:Continuum_mechanics.
- Fluid_parcel subject Category:Fluid_dynamics.
- Fluid_parcel type Dynamic.
- Fluid_parcel type Mechanic.
- Fluid_parcel comment "In fluid dynamics, within the framework of continuum mechanics, a fluid parcel is a very small amount of fluid, identifiable throughout its dynamic history while moving with the fluid flow. As it moves, the mass of a fluid parcel remains constant, while—in a compressible flow—its volume may change. And its shape changes due to the distortion by the flow.".
- Fluid_parcel label "Fluid parcel".
- Fluid_parcel sameAs Parcela_de_fluido.
- Fluid_parcel sameAs 流体粒子.
- Fluid_parcel sameAs Bidang_bendalir.
- Fluid_parcel sameAs Luftpakke.
- Fluid_parcel sameAs Luftpakke.
- Fluid_parcel sameAs Cząstka_próbna_(meteorologia).
- Fluid_parcel sameAs m.02f22b.
- Fluid_parcel sameAs Флуидни_делић.
- Fluid_parcel sameAs Q3271065.
- Fluid_parcel sameAs Q3271065.
- Fluid_parcel wasDerivedFrom Fluid_parcel?oldid=661304813.
- Fluid_parcel isPrimaryTopicOf Fluid_parcel.