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Role of Convection Flow on the Pattern Formation in the Drying Process of Colloidal Suspension

Ma Wen-Jie1, Wang Yu-Ren1 and Lan Ding1

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We study the macroscopic drying patterns of aqueous suspensions of colloidal silica spheres. It was found that convection strength can influence pattern formation. Uniformed films are obtained at weaker convection strength. In addition, we make clear that it is not reasonable to discuss individually the effect of temperature and humidity on the colloid self-assembly. The physical mechanism is that these factors have relationship with the evaporation rate, which can affect the convection strength.


PACS

47.54.-r Pattern selection; pattern formation

47.57.E- Suspensions

47.55.P- Buoyancy-driven flows; convection

47.57.J- Colloidal systems

Subjects

Soft matter, liquids and polymers

Fluid dynamics

Dates

Issue 4 (April 2008)

Received 10 December 2007



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