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Morphology, hierarchy, and dynamics of desiccation cracks in colloidal deposits

Morphology, hierarchy, and dynamics of desiccation cracks in colloidal deposits

Date22nd Jul 2021

Time03:00 PM

Venue Google meet: https://meet.google.com/poc-ukje-ekb

PAST EVENT

Details

Desiccation cracks form when the fluid evaporates from a colloidal dispersion. Such cracks are ubiquitous and are often encountered in nature, for example, on dried river beds or ancient paintings. Cracks naturally form to release the excess stress energy that develops during the drying process. Although the physics of the nucleation and growth kinetics of single cracks is well established in the literature, most questions associated with the self-assembly of multiple cracks leading to various appealing patterns remain largely unexplored. Interestingly, the self-assembly process of cracks is often driven by non-equilibrium processes such as drying and cooling of colloidal suspension. It is germane to mention that desiccation cracks exhibit intriguing patterns which depend upon several factors such as drying kinetics, environmental conditions, etc. Recently, our group has demonstrated the intricate correlations between the desiccation crack patterns and externally applied fields such as elec tric field, magnetic field, thermal field. In this thesis, we propose investigating the dynamics of desiccation cracks and the role of various physical-chemical factors on the formation of crack patterns.

Speakers

Mr. SANKET KUMAR, (PH18D013)

Department of Physics