Abstract
Flow measurements by means of LDA technique always require particles being suspended in the flow to scatter the laser light. Because the measured particle velocity is used to represent the flow velocity, particles have to be able to follow the flow, especially flow fluctuations. Such a capability of particles is determined by both the particle size and the particle density. In general, a particle in the flow does not behave as a fluid particle because of the difference in their densities. In measuring non-stationary flows or the flows with large velocity fluctuations for instance, particles may have different velocities as the flow.
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References
Carter J, Martin K, Campbell W, Hall N, Ezekoye O (2001) Design of an oscillating flow apparatus for the study of low Reynolds number particle dynamics. J Exp Fluids 30:578–583
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Zhang, Z. (2010). Tracer Particles and Particle Motion Equations. In: LDA Application Methods. Experimental Fluid Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-13514-9_7
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DOI: https://doi.org/10.1007/978-3-642-13514-9_7
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Publisher Name: Springer, Berlin, Heidelberg
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Online ISBN: 978-3-642-13514-9
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