Microscopic origin of shear relaxation in a model viscoelastic liquid.

  title={Microscopic origin of shear relaxation in a model viscoelastic liquid.},
  author={J. Ashwin and Abhijit Sen},
  journal={Physical review letters},
  volume={114 5},
  • J. Ashwin, A. Sen
  • Published 1 August 2014
  • Physics, Medicine
  • Physical review letters
An atomistic description of shear stress relaxation in a viscoelastic liquid is developed from first principles through accurate molecular dynamic simulations in a model Yukawa system. It is shown that the relaxation time τ(M)(ex) of the excess part of the shear stress autocorrelation function provides a correct measure of the relaxation process. Below a certain critical value Γ(c) of the Coulomb coupling strength, the lifetime of local atomic connectivity τ(LC) converges to τ(M)(ex) and is the… 
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