Modeling phase behavior for quantifying micro-pervaporation experiments
Modeling phase behavior for quantifying micro-pervaporation experiments
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模拟相行为以量化微渗透蒸发实验
DOI:
10.1140/epje/i2008-10419-y
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
A. Ajdari
中科院分区:
文献类型:
--
作者:
M. Schindler;A. Ajdari
We present a theoretical model for the evolution of mixture concentrations in a micro-pervaporation device, similar to those recently presented experimentally. The described device makes use of the pervaporation of water through a thin PDMS membrane to build up a solute concentration profile inside a long microfluidic channel. We simplify the evolution of this profile in binary mixtures to a one-dimensional model which comprises two concentration-dependent coefficients. The model then provides a link between directly accessible experimental observations, such as the widths of dense phases or their growth velocity, and the underlying chemical potentials and phenomenological coefficients. It shall thus be useful for quantifying the thermodynamic and dynamic properties of dilute and dense binary mixtures.
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