Imaginary line that tangent to any point gives direction of motion at point - Fluid Mechanics

Q.  The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at the point, is called as
- Published on 04 Aug 15

a. path line
b. streak line
c. filament line
d. stream line

ANSWER: stream line

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    Discussion

  • Pankaj   -Posted on 25 Sep 15
    There are various types of flow lines in a flow field such as streak line or filament line, path line and stream line. Stream line is the imaginary line which is drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point. In a steady flow, the path line, streak line and stream line remain identical. Path line is the actual path followed by a fluid particle as it moves during a period of time. A path line can intersect itself. Streak line or filament line gives an instantaneous representation of the location of the fluid particles, which have passed through a given point.

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