Flow Visualization Techniques - Yarn
- Yarn Tufts - tape ~1 segments of yarn directly to the surface.
- Tuft Probe - tape ~3 light-weight (and visible) string to end of rod. Probe the flow.
- Tuft Grid - attach ~1 segments of yarn to a wire mesh (screen) and place behind object (perpendicular orientation to the flow)
- Trailing Edge Cone - tape one end of string to paper cone, and the other end to (spanwise) edge of model. This illustrates streamwise vorticity, if present. Its great for delta wings.
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