Heterodyne speckle velocimetry

Journal Article · Mon May 08 00:00:00 EDT 2006 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2200396· OSTI ID:20779286

Alaimo, M D; Magatti, D; Ferri, F; Potenza, M A.C. ^[1]

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1. Dipartimento di Fisica, Universita di Milano and CNR-INFM, Via Celoria 16, Milan I-20133 (Italy)

We present a simple method for fluid velocimetry based on the velocity of the heterodyne speckles generated by tracking particles illuminated with coherent light. It works in real time and provides instantaneous two-dimensional velocity mappings in the direction orthogonal to the optical axis, independently of the particle concentration and size, also for subwavelength particles. It also provides the velocity distribution of the fluid over the entire sample thickness. The method has been quantitatively tested by using the motions of rigid diffusers and applied for mapping the flow of a confined fluid.

• OSTI ID: 20779286
• Journal Information: Applied Physics Letters, Vol. 88, Issue 19; Other Information: DOI: 10.1063/1.2200396; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
FLOW VISUALIZATION
FLUID FLOW
MAPPING
PARTICLES
THICKNESS
VELOCIMETERS
VELOCITY
VISIBLE RADIATION