Paper Number
PO29                         My Program 

Session
Poster Session

Title
Characterizing the microstructure of shear jammed dense suspensions: A Network Science Approach

Presentation Date and Time
October 16, 2024 (Wednesday) 6:30

Track / Room
Poster Session / Waterloo 3 & 4

Authors (Click on name to view author profile)

  1. Sharma, Shweta (Case Western Reserve University, Macromolecular Science and Engineering)
  2. Sharma, Abhishek (University of Chicago, Pritzker School of Molecular Engineering)
  3. Singh, Abhinendra (Case Western Reserve University, Macromolecular Science and Engineering)

Author and Affiliation Lines (in printed abstract book)
Shweta Sharma1, Abhishek Sharma2 and Abhinendra Singh1
1Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44106; 2Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL

Speaker / Presenter 
Sharma, Shweta

Keywords
computational methods; dense systems; networks; non-Newtonian fluids; real-world rheology; suspensions

Text of Abstract
Dense suspensions are crucial in a wide range of industrial applications, from personal care products to construction materials, due to their unique and complex behaviors that arise from particle interactions under applied shear forces. These interactions are not only influenced by the physical properties of the particles such as size but also by the pairwise interparticle forces they experience, which can lead to phenomena such as shear jamming or strong shear thickening. Numerical simulations have demonstrated that shear thickening and jamming is closely associated with frictional forces that stabilize the networks of force chains within the suspension, thereby resisting external deformation[1-3]. Incorporating rolling friction into these models has been shown to further enhance the accuracy of predictions especially for rough particles, making them more reliable for practical applications. In our research, we utilize network theory tools[4] to conduct an in-depth analysis of force chain networks within dense suspensions that exhibit both sliding and rolling friction. By doing so, we can explore the intricate microstructures that develop during shear jamming. Our focus is on key metrics such as the distribution of forces within the network, the lifetime of force chains, the distribution of void areas, the identification of critical nodes within the network, and the overall anisotropy of the force chain structures. Through this comprehensive examination, we aim to gain a more profound understanding of the mechanical and rheological properties of dense suspensions, ultimately providing valuable insights into their behavior under varying conditions and contributing to the development of more effective industrial processes. [1]J. F. Morris, Ann.Rev.FluidMech. (2020), 52, 1, 121-144 [2]M. Wyart and M.?E. Cates, PRL (2014), 112, 098302 [3]A. Singh, C. Ness, R. Seto, J. J. de Pablo, and H. M. Jaeger, PRL (2020), 124, 248005 [4]L. Papadopoulos, M. A Porter, K. E Daniels, D.S Bassett J. Comp. Networks (2018) 6, 485–565