Abstract
Dense suspensions of fine particles are significant in numerous biological, industrial, and natural phenomena. They are often out-of-equilibrium and display various rheological features including liquid–solid phase transition under external deformation being one of the most interesting one. Developing an understanding of the mechanisms that drive these phenomena has over the last several years led to a surge in research activity at the intersection of fluid mechanics, granular materials, driven disordered systems, tribology, and soft condensed matter physics. One central aspect that emerged is that these phenomena occur due to a shear-activated or deactivated network of contacts between particles. The perspective briefly presents the current state of understanding and challenges associated with relating the flow of material at the bulk scale with the microscopic physics at the particle scale.
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Acknowledgments
I acknowledge Case Western Reserve University for the start-up funding for the project. I am grateful to my mentors Heinrich M. Jaeger and Juan J. de Pablo (University of Chicago); Jeffrey F. Morris and Morton M. Denn (Levich Institute, City College of New York); Stefan Luding and Vanessa Magnanimo (University of Twente, The Netherlands) for their valuable guidance that has been critical in shaping my thoughts. The work presented here has been performed in several collaborations with Romain Mari, Ryohei Seto, Christopher Ness, Sidhant Pednekar, Jaehun Chun, Grayson L. Jackson, and Michael van der Naald. I would also like to thank Stuart Rowan, Bulbul Chakraborty, Emanuela del Gado, Safa Jamali, Lilian Hsiao, Lou Kondic, Aurora Clark, Jacinta Konrad, Sarah Hormozi, Douglas Jerolmack, and Karen Daniels for many insightful discussions. I appreciate the collaborations with Omer Sedes, Jetin E Thomas, Kabir Ramola, Qin Xu, Marcio Gameiro, and Konstantin Mischaikow. I have thoroughly enjoyed working with my colleagues and friends: Elise Chen, Abhishek Sharma, Endao Han, Nicole M James, Neil Dolinski, Melody X Lim, and Bryan VanSaders for many fruitful discussions over the years.
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