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Family of curves that are instantaneously tangent to the velocity vector of the flow, showing direction in which a massless fluid element is travelling at any point in time
See also
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Streamlines @model
Streaklines and Pathlines
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Family of curves that are instantaneously tangent to the velocity vector of the flow, showing direction in which a massless fluid element is travelling at any point in time
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Streaklines and Pathlines