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  2. Skin friction line - Wikipedia

    en.wikipedia.org/wiki/Skin_friction_line

    A limit streamline is a streamline where the distance normal to the surface tends to zero. Limit streamlines and skin friction lines coincide. [1] The lines can be visualized by placing a viscous film on the surface. [1] The skin friction lines may exhibit a number of different types of singularities: attachment nodes, detachment nodes ...

  3. Streamlines, streaklines, and pathlines - Wikipedia

    en.wikipedia.org/wiki/Streamlines,_streaklines...

    The dashed lines represent contours of the velocity field (streamlines), showing the motion of the whole field at the same time. (See high resolution version.) Solid blue lines and broken grey lines represent the streamlines. The red arrows show the direction and magnitude of the flow velocity. These arrows are tangential to the streamline.

  4. Soil mechanics - Wikipedia

    en.wikipedia.org/wiki/Soil_mechanics

    The shear strength of soils is primarily derived from friction between the particles and interlocking, which are very sensitive to the effective stress. [ 7 ] [ 6 ] The article concludes with some examples of applications of the principles of soil mechanics such as slope stability, lateral earth pressure on retaining walls, and bearing capacity ...

  5. Drag (physics) - Wikipedia

    en.wikipedia.org/wiki/Drag_(physics)

    The effect of streamlining on the relative proportions of skin friction and form drag is shown in the table at right for an airfoil, which is a streamlined body, and a cylinder, which is a bluff body.

  6. Stagnation point flow - Wikipedia

    en.wikipedia.org/wiki/Stagnation_point_flow

    In fluid dynamics, a stagnation point flow refers to a fluid flow in the neighbourhood of a stagnation point (in two-dimensional flows) or a stagnation line (in three-dimensional flows) with which the stagnation point/line refers to a point/line where the velocity is zero in the inviscid approximation. The flow specifically considers a class of ...

  7. Skin friction drag - Wikipedia

    en.wikipedia.org/wiki/Skin_friction_drag

    Skin friction drag is a type of aerodynamic or hydrodynamic drag, which is resistant force exerted on an object moving in a fluid.Skin friction drag is caused by the viscosity of fluids and is developed from laminar drag to turbulent drag as a fluid moves on the surface of an object.

  8. Streamsurface - Wikipedia

    en.wikipedia.org/wiki/Streamsurface

    It is the union of all streamlines seeded densely on a curve. Like a streamline, a stream surface is used to visualize flows – three-dimensional flows in this case. Specifically, it is "the locus of an infinite set of such curves [streamlines], rooted at every point along a continuous originating line segment." [1]

  9. Wind gradient - Wikipedia

    en.wikipedia.org/wiki/Wind_gradient

    Wind speed increases with increasing height above the ground, starting from zero [dubious – discuss] [6] due to the no-slip condition. [8] Flow near the surface encounters obstacles that reduce the wind speed, and introduce random vertical and horizontal velocity components at right angles to the main direction of flow. [9]