2. For a velocity measurement of flow, PIV (Particle Image Velocimetry) technolo

Question

2. For a velocity measurement of flow, PIV (Particle Image Velocimetry) technolog.y can be utilized. PIV measures the full-field instantaneous velocities in a planar cross-section of a flow. The technique tracks the time displacement of particles, which are assumed to follow the flow. Select the flow line type traced out by PIV with explanation. (1) Streamline (2) Streakline (3) Pathline (4) Timeline Flow Image 2 Interrogation region 2-D laser sheet Image 1 CCD camera Data acquisition Data reduction

Explanation / Answer

Here, PIV measures the full-field instantaneous velocities in a planer cross-section flow. So Streamlines flow are predicted at output of PIV.

Streamlines are a family of curves that are instantaneously tangent to the velocity vector of the flow. These show the direction in which a massless fluid element will travel at any point in time.By definition, different streamlines at the same instant in a flow do not intersect, because a fluid particle cannot have two different velocities at the same point. Similarly, streaklines cannot intersect themselves or other streaklines, because two particles cannot be present at the same location at the same instant of time; unless the origin point of one of the streaklines also belongs to the streakline of the other origin point. However, pathlines are allowed to intersect themselves or other pathlines

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.