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    Crust formation in drying colloidal suspensions

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    Type
    Article
    Authors
    Style, R. W.
    Peppin, S. S. L.
    KAUST Grant Number
    KUK-C1-013-04
    Date
    2010-06-30
    Online Publication Date
    2010-06-30
    Print Publication Date
    2011-01-08
    Permanent link to this record
    http://hdl.handle.net/10754/597902
    
    Metadata
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    Abstract
    During the drying of colloidal suspensions, the desiccation process causes the suspension near the air interface to consolidate into a connected porous matrix or crust. Fluid transport in the porous medium is governed by Darcy's law and the equations of poroelasticity, while the equations of colloid physics govern processes in the suspension. We derive new equations describing this process, including unique boundary conditions coupling the two regions, yielding a moving-boundary model of the concentration and stress profiles during drying. A solution is found for the steady-state growth of a nedimensional crust during constant evaporation rate from the surface. The solution is used to demonstrate the importance of the system boundary conditions on stress profiles and diffusivity in a drying crust. © 2011 The Royal Society.
    Citation
    Style RW, Peppin SSL (2010) Crust formation in drying colloidal suspensions. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 467: 174–193. Available: http://dx.doi.org/10.1098/rspa.2010.0039.
    Sponsors
    This publication is based on work supported by Award No. KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST).
    Publisher
    The Royal Society
    Journal
    Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
    DOI
    10.1098/rspa.2010.0039
    ae974a485f413a2113503eed53cd6c53
    10.1098/rspa.2010.0039
    Scopus Count
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