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Instabilities in droplets spreading on gels | Karen E. Daniels
; Shomeek Mukhopadhyay
; Robert P. Behringer
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; | Date: |
12 Jun 2006 | Subject: | Soft Condensed Matter | Abstract: | The surface-tension driven spreading of liquids is industrially and biologically important, and has been studied in detail on both solid and liquid substrates. Less is known about how droplet spreading is modified in the presence of a compliant substrate, a situation especially relevant to biological applications. We perform droplet-spreading experiments on gel agar, a viscoelastic material, to explore the influence of substrate on the spreading dynamics of the droplet. We find a novel branching instability with an onset that is controlled by the ratio of surface tension difference to the shear strength of the gel. The existence of a spreading morphology in which a spreading droplet becomes spatially localized has important implications for the industrial and medical application ofsurfactants. | Source: | arXiv, cond-mat/0606296 | Services: | Forum | Review | PDF | Favorites |
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