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Gellification and pseudo surface tensionWhen an elongated droplet gellifies, its shape relaxes towards a sphere as for immiscible liquids even if the interfacial energy is zero. The mechanism is the elastic energy associated with the contraction of the surface gel layer, which acts as a surface energy and drives the viscous flow of the (still) liquid core. More details in the paper. |
Buckles, telephone cords and moreThin films with strong compressive residual stresses and low adhesion may delaminate, forming buckles. Sometimes the mechanics of thin films conspires with the physics of adhesion to impart unexpected forms to these buckles. We investigate the contorted patterns of thin film buckles ;. |
 The lobes around this quasi-circular thin film buckle are induced by mode-mix dependent adhesion. |