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INDIAN INSTITUTE OF TECHNOLOGY PALAKKAD
Nila Campus, Kanjikode, Palakkad, Kerala - 678623
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Dr. Vishwas V
Assistant Professor
Physics
vishwas@iitpkd.ac.in
Research Area: Metastable and out of equilibrium systems, Research Area: Phase behaviour of metastable liquids, Research Area: Rheology of dense disordered solids
  • Biosketch

    PhD, thesis entitled “Phase behaviour of supercooled liquid silicon”, from JNCASR, Bangalore, India (2012).

    Postdoctoral fellow at ETH Zürich, Switzerland, (2015).

    Postdoctoral fellow at Georgetown University, Washington DC, USA (2017).

    Postdoctoral fellow at Laboratoire Interdisciplinaire de Physique, Université Grenoble Alpes, Grenoble, France (2019).

  • Research

    My research interests focus on the topics of evolution of out-of-equilibrium systems and metastable states and its eventual fate. A metastable phase corresponds to a local minimum in free energy in comparison with the global minimum associated with the stable phase. Under thermal fluctuations, these systems can transition towards a stable phase (eg., nucleation of ice) or fall out of equilibrium (eg., vitrification of glass). Materials like emulsions, foams, cement etc., fall under another class of materials wherein the thermal fluctuations are not sufficient enough to overcome the free energy barriers. In such cases external perturbations like shear and vibration can facilitate the system to evolve and in turn affect the macroscopic properties, which can be either catastrophic (eg., failure or breaking of material) or functional in nature (eg., flow of ketchup or mixing of cement). 

    Under the wide scope of topics described above, I am currently working on specific problems related to i) Rheology of dense disordered systems, ii) Hierarchical structures in composite material, iii) Phase behavior of metastable liquids, iv) Relaxation dynamics and crystal nucleation of supercooled liquids, v) Understanding the role of thermal and mechanical noise in driven systems. To investigate these topics I use computational tools including molecular dynamics, Monte Carlo simulations as well as mesoscale and semi-analytical models.

     

     

  • Additional Information
  • Publications
    Thermodynamics and kinetics of crystallisation in deeply supercooled Stillinger-Weber silicon
    Yagyik Goswami, Vishwas V Vasisht, Daan Frenkel, Pablo G Debenedetti, Srikanth Sastry
    The Journal of Chemical Physics (in press) (2021)
    Computational study of transient shear banding in soft jammed solids
    Vishwas V Vasisht and Emanuela Del Gado
    Physical Review E 102 (1) 012603 (2020)
    Emergence and persistence of flow inhomogeneities in the yielding and fluidization of dense soft solids
    Vishwas V Vasisht, Gabrielle Roberts, Emanuela Del Gado
    Physical Review E 102 (1) 010604 (2020)
    Rate Dependence of Elementary Rearrangements and Spatiotemporal Correlations in the 3D Flow of Soft Solid
    Vishwas V. Vasisht, Sudeep K. Dutta, Emanuela Del Gado, and Daniel L. Blair
    Physical Review Letters 120 018001 (2018)
    Nesting of anomalies in supercooled silicon
    Vishwas V Vasisht, John Mathew, Shiladitya Sengupta and Srikanth Sastry
    Journal of Chemical Physics 141 124501 (2014)
    Diffusivity anomaly in modified Stillinger-Weber liquids
    Shiladitya Sengupta, Vishwas V Vasisht and Srikanth Sastry
    Journal of Chemical Physics 140 044503 (2014)
    Liquid-liquid phase transition in supercooled silicon
    Vishwas V Vasisht and Srikanth Sastry
    Advances in Chemical Physics, 152 (2012)
    Liquid–liquid critical point in supercooled silicon
    Vishwas V Vasisht, Shibu Saw and Srikanth Sastry
    Nature Physics 7 549-553 (2011)

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Kerala | Pin: 678623

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