In this work a novel approach is investigated for Particle Image Velocimetry (PIV) which is a technique used as optical method for instantaneous flow visualization. So far traditional PIV is based in the injection of small seed-particles which are entrained by the flow and illuminated so that particles are visible and the motion of the seeding particles is used to calculate speed and direction of the flow. Here, the seed-particles are replaced by magnetic clusters and instead to be illuminated are subjected to alternating magnetic field which result in local hyperthermia of the cluster owing to the dissipative power from the motion in the viscous medium. The heat radiation emitted by the particles may be detected by infrared cameras which impressive achievement in the last decade permit to analyze dynamic events. Because the most recent advances in detection and tracking in thermal infrared imagery, Thermal-PIV by the use of hyperthermal magnetic clusters allow a unique feature, namely, the visualization of flows through opaque bodies which, could have important applications not only in the industry but in medicine. Utilizing a physical model the heating dissipative power was studied and computational fluid dynamics (CFD) simulations were performed

This research was supported by the Spanish Ministry of Economy and Competitiveness under fellowship grant Ramon y Cajal: RYC-2013-13459

Internal report. Possibility for PIV detection using magnetic heating of magnetic nano particles