Uma revisão sobre o efeito Toms: o fenômeno onde macromoléculas atenuam a turbulência em um líquido

Química Nova

Vanessa C. Bizotto²  Melissa I. Alkschbirs¹  Edvaldo Sabadini¹ 

[1] ,Universidade Estadual de Campinas Centro de Estudos de Petróleo Campinas SP ,Brasil

关键词: drag reduction;    polymer solutions;    wormlike micelles;   

DOI  :  10.1590/S0100-40422011000400019

来源: SciELO

【 摘 要 】

It is very well known that the addition of polymers to a liquid increases the shear viscosity of the solution. In other words, the polymer increases the dissipation of the flow energy. Contrarily, in turbulent flow, some particular macromolecules in very low concentration are able to produce large attenuation in the turbulence and thus, decreasing the dissipation of the energy. This article present a brief revision about macroscopic and molecular models used to explain this dynamic effect. Some of the experimental techniques used to quantify the attenuation of the turbulence and the main active substances are also discussed.

【 授权许可】

CC BY-NC   
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