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These arrows are tangential to the streamline. The group of streamlines enclose the green curves ( C 1 {\displaystyle C_{1}} and C 2 {\displaystyle C_{2}} ) to form a stream surface. Streamlines , streaklines and pathlines are field lines in a fluid flow .
That is, in two dimensions each streamline is a level curve of the stream function. The difference between the stream function values at any two points gives the volumetric flux through the vertical surface that connects the two points.
Article covers many important aspects, but still needs more figures showing different streamline/streakline patterns in flows. Possibility of adding timeline which are also used to describe/visualize a flow. Timeline describes the deformation of adjacent fluid particles as they move around. Sketch showing different types of lines in a flow field.
File:Lagrangian vs Eulerian [further explanation needed] Eulerian perspective of fluid velocity versus Lagrangian depiction of strain.. In classical field theories, the Lagrangian specification of the flow field is a way of looking at fluid motion where the observer follows an individual fluid parcel as it moves through space and time.
The ψ = 0 streamline is particularly interesting: it has two (or four) branches, following the coordinate axes, i.e. x = 0 and y = 0. As no fluid flows across the x-axis, it (the x-axis) may be treated as a solid boundary. It is thus possible to ignore the flow in the lower half-plane where y < 0 and to focus on the flow in the upper halfplane ...
An FHA streamline refinance is a type of refinance loan available to FHA loan borrowers. As with any refinance, it involves taking out a new mortgage that you use to pay off your current one.It ...
The "Streamline curvature theorem" states that the pressure at the upper surface of an airfoil is lower than the pressure far away and that the pressure at the lower surface is higher than the pressure far away; hence the pressure difference between the upper and lower surfaces of an airfoil generates a lift force.
As the flow passes by the paint, the fluid picks up some of the paint's color, averaging it with the color it has already acquired. The result is a randomly striped, smeared texture where points along the same streamline tend to have a similar color. Other physical examples include: whorl patterns of paint, oil, or foam on a river