Abstract

SALINAS-SALAS, G.. Behaviour of the Sedimentation in a System of Microparticles. Ing. invest. y tecnol. [online]. 2012, vol.13, n.2, pp.257-262. ISSN 2594-0732.

This paper presents the experimental determination of the behaviour of the sedimentation velocity of systems of micro particles based on the results achieved, evaluating whether there is any difference between the value of the exponent of hindrance function, determined by Richardson and Zaki (1954), in the case of noncolloidal micro particles in order of size between 1,500 nm to 200 nm, as well as describing the behaviour of the already mentioned exponent. At the same time, exposed the experimental work developed under the standard DIN 66111 (1989), using an analytical centrifuge, as well as the analysis of data extracted from it. The data showed that there is a difference between the value proposed by Richardson and Zaki in 1954, in relation to those experimentally determined. This allows us to infer that for micro-systems smaller than 1,000 nm, there is a new value of the exponent of the hindrance function, approximately of the order of 11.5. Additionally, it was determined that there is a relation between the already mentioned exponent and the average size of micro particles that comprise the system of particles settled.

Keywords : experimental; sedimentation velocity; micro particles; noncolloidal; hindrance function; exponent.

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