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The effect of electric double layers, zeta potential and pH on apparent viscosity of non-Brownian suspensions
  • Sudharsan Srinivasan,
  • Harry Van den Akker,
  • Orest Shardt
Sudharsan Srinivasan
Synthesis and Solid Sate Pharmaceutical Center (SSPC)
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Harry Van den Akker
Synthesis and Solid State Pharmaceutical Centre (SSPC),

Corresponding Author:[email protected]

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Orest Shardt
Synthesis and Solid State Pharmaceutical Center (SSPC)
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We carried out 3-D simulations of monodisperse particle suspensions subjected to a constant shear rate with the view to investigate the effect of electrical double layers around the particles on apparent suspension viscosities. To this end, expressions for Debye length, zeta potential and ionic strength (pH) of the liquid were incorporated into our in-house lattice Boltzmann code that uses the Immersed Boundary method and includes sub-grid lubrication models. We varied the solids concentration and particle radius, keeping the particle Reynolds number equal to 0.1. We report on results with respect to the effect of pH (in the range 9 through 12) and Debye length on apparent viscosity and spatial suspension structures, particularly at higher solids volume fractions, and on the effect of flow reversals.
22 Jan 2023Submitted to AIChE Journal
23 Jan 2023Submission Checks Completed
23 Jan 2023Assigned to Editor
23 Jan 2023Review(s) Completed, Editorial Evaluation Pending
26 Jan 2023Reviewer(s) Assigned
09 Mar 2023Editorial Decision: Revise Major
06 Apr 20231st Revision Received
08 Apr 2023Submission Checks Completed
08 Apr 2023Assigned to Editor
08 Apr 2023Review(s) Completed, Editorial Evaluation Pending
16 May 2023Reviewer(s) Assigned
19 Jun 2023Editorial Decision: Accept