Title:
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Light scattering from suspensions under external gradients
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Author:
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Bonet i Avalos, Josep; Rubí Capaceti, José Miguel; Rodríguez, R.; Pérez Madrid, Agustín
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Other authors:
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Universitat de Barcelona |
Abstract:
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We analyze the light-scattering spectrum of a suspension in a viscoelastic fluid under density and velocity gradients. When a density gradient is present, the dynamic structure factor exhibits universality in the sense that its expression depends only on the reduced frequency and the reduced density gradient. For a velocity gradient, however, the universality breaks down. In this last case we have found a transition point from one to three characteristic frequencies in the spectrum, which is governed by the value of the external gradient. The presence of the viscoelastic time scales introduces a shift in the ``critical¿¿ point. |
Subject(s):
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-Mecànica estadística -Fluctuacions (Física) -Statistical mechanics -Fluctuations (Physics) |
Rights:
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(c) The American Physical Society, 1990
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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