# Particle Image Velocimetry

Particle image velocimetry (PIV) usually fixes the imaging position before the measurement, so if the structure of interest departs from expectation, no later algorithm can recover information that was never captured. This work treats camera placement as a closed-loop decision variable: a DreamerV3 agent trained in Isaac Sim drives a 6-DoF arm using only the velocity field and uncertainty estimated by LIMA to locate, frame and resolve a hydrofoil wake. After zero-shot transfer to a real water tunnel, the agent locates wakes of randomly placed hydrofoils and measures them at higher resolution and lower flow-statistics error than a fixed view, in roughly half the time of a full scan and with far fewer image pairs.

Particle image velocimetry (PIV) usually fixes the imaging position before the measurement, so if the structure of interest departs from expectation, no later algorithm can recover information that was never captured. This work treats camera placement as a closed-loop decision variable: a DreamerV3 agent trained in Isaac Sim drives a 6-DoF arm using only the velocity field and uncertainty estimated by LIMA to locate, frame and resolve a hydrofoil wake. After zero-shot transfer to a real water tunnel, the agent locates wakes of randomly placed hydrofoils and measures them at higher resolution and lower flow-statistics error than a fixed view, in roughly half the time of a full scan and with far fewer image pairs.