Data di Pubblicazione:
2007
Citazione:
Heterodyne speckle velocimetry of Poiseuille flow / D. Magatti, M.D. Alaimo, M.A.C. Potenza, F. Ferri. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 102:7(2007), pp. 073113.073113.1-073113.073113.8.
Abstract:
We review the technique named heterodyne speckle velocimetry and present two applications for
testing the method with a fluid moving under the conditions of Poiseuille flow. The fluid was seeded
with small tracking particles diameter 300 nm and fluxed between the two parallel planes of a cell
with constant or variable cross section. In the first case the velocity distribution was constant along
the direction parallel to the planes and was in excellent agreement with the expected Poiseuille
profile along the orthogonal direction. In the second case, where velocity gradients were present also
along the planes, the technique was able to reconstruct both the orthogonal Poiseuille profile and the
in-plane two dimensional mapping of the velocity vectors, with the possibility of measuring the fluid
flux within an accuracy of 1%.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Scattering ; speckles; optical velocimetry ; fluids
Elenco autori:
D. Magatti, M.D. Alaimo, M.A.C. Potenza, F. Ferri
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