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  1. Dictionary
    Bound·a·ry lay·er
    /ˈbound(ə)rē ˈlāər/

    noun

    • 1. a layer of more or less stationary fluid (such as water or air) immediately surrounding an immersed object in relative motion with the fluid.

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  3. en.wikipedia.org › wiki › Boundary_layerBoundary layer - Wikipedia

    In physics and fluid mechanics, a boundary layer is the thin layer of fluid in the immediate vicinity of a bounding surface formed by the fluid flowing along the surface. The fluid's interaction with the wall induces a no-slip boundary condition (zero velocity at the wall).

  4. www.britannica.com › science › boundary-layerBoundary layer | Definition, Characteristics, & Facts

    boundary layer, in fluid mechanics, thin layer of a flowing gas or liquid in contact with a surface such as that of an airplane wing or of the inside of a pipe. The fluid in the boundary layer is subjected to shearing forces.

    • The Editors of Encyclopaedia Britannica

  5. www.thermal-engineering.org › what-is-boundaryWhat is Boundary Layer – Definition - Thermal Engineering

    May 22, 2019 · The region in which flow adjusts from zero velocity at the wall to a maximum in the main stream of the flow is termed the boundary layer. The concept of boundary layers is of importance in all of viscous fluid dynamics and also in the theory of heat transfer.

  6. www.grc.nasa.gov › WWW › K-12Boundary Layer - NASA

    May 13, 2021 · Boundary layers may be either laminar (layered), or turbulent (disordered) depending on the value of the Reynolds number. For lower Reynolds numbers, the boundary layer is laminar and the streamwise velocity changes uniformly as one moves away from the wall, as shown on the left side of the figure. For higher Reynolds numbers, the boundary ...

  7. geo.libretexts.org › Bookshelves › Sedimentology3.6: Boundary Layers - Geosciences LibreTexts

    A boundary layer is the zone of flow in the immediate vicinity of a solid surface or boundary in which the motion of the fluid is affected by the frictional resistance exerted by the boundary.

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  9. www.merriam-webster.com › dictionary › boundary layerBoundary layer Definition & Meaning - Merriam-Webster

    The meaning of BOUNDARY LAYER is a region of fluid (such as air) moving relative to a nearby surface (such as that of an airplane wing) that is slowed by the viscosity of the fluid and its adhesion to the surface.

  10. bio.libretexts.org › Courses › Coastline_College7.1: Defining the Cell’s Boundary - Biology LibreTexts

    Jun 13, 2023 · This boundary layer, the structural ancestor of the plasma membrane of modern cells, serves to maintain the integrity of the living system and mediates the movement of materials and energy into and out of the cell.

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