loading page

Experimental and Numerical Investigations of the Shear Behavior of Binary Particle Blends
  • +2
  • Jiecheng Yang,
  • Poom Bunchatheeravate,
  • Subhash Thakur,
  • Joseph Bullard,
  • Jennifer Sinclair Curtis
Jiecheng Yang
University of California Davis

Corresponding Author:[email protected]

Author Profile
Poom Bunchatheeravate
Vertex Pharmaceuticals Incorporated
Author Profile
Subhash Thakur
Vertex Pharmaceuticals Incorporated
Author Profile
Joseph Bullard
Vertex Pharmaceuticals Incorporated
Author Profile
Jennifer Sinclair Curtis
Universtity of California, Davis
Author Profile


In this study, a Schulze Ring Shear Tester and the Discrete Element Method (DEM) are employed to investigate the effect of polydispersity on the binary shear flows. Both experimental results and DEM simulations show that the pre-shear stresses are greater for binary blends than for monodispersed particles. The flowability of these mixtures is strongly affected by the solid fraction, with minimal flow function values correlating to maximum packing fraction. However, minimum flow function values are not observed at the same packing fractions where the maximum pre-shear stress occurs. The powder friction has a slightly higher contribution to powder strength than powder adhesion, and the frictional component follows the same trend as shear stress with mixture composition. Using DEM, it is demonstrated that the addition of small adhesive particles reduces the averaged angular velocity of the larger particles, which makes a contribution to the larger shear stress for binary blends.
07 May 2020Submitted to AIChE Journal
07 May 2020Submission Checks Completed
07 May 2020Assigned to Editor
15 Jun 2020Reviewer(s) Assigned
15 Jul 2020Editorial Decision: Revise Major
07 Sep 20201st Revision Received
14 Sep 2020Submission Checks Completed
14 Sep 2020Assigned to Editor
16 Sep 2020Reviewer(s) Assigned
01 Oct 2020Editorial Decision: Accept
06 Oct 2020Published in AIChE Journal. 10.1002/aic.17090