Paper Number
AR32 

Session
Applied Rheology and Rheology Methods

Title
Validation of the three component model using a newly formulated yield stress model fluid and analytical solution for laminar pipe flow

Presentation Date and Time
October 13, 2021 (Wednesday) 5:00

Track / Room
Track 2 / Ballroom 7

Authors (Click on name to view author profile)

  1. Caggioni, Marco (Procter & Gamble Company, Complex Fluid Microstructures)
  2. Tozzi, Emilio (Procter & Gamble Company, Complex Fluid Microstructures)
  3. Hipp, Julie B. (Procter & Gamble Company, Complex Fluid Microstructures)
  4. Hartt, William H. (Procter & Gamble Company, Complex Fluid Microstructures)

Author and Affiliation Lines (in printed abstract book)
Marco Caggioni, Emilio Tozzi, Julie B. Hipp and William H. Hartt
Complex Fluid Microstructures, Procter & Gamble Company, West Chester, OH 45069

Speaker / Presenter 
Caggioni, Marco

Keywords
experimental methods; theoretical methods; gels; glasses; non-Newtonian fluids; rheology methods

Text of Abstract
We designed a model yield stress fluid composed by 2 ingredients - Propylene glycol and Carbopol. It’s also suitable for detailed rheology measurement over a large temperature range for having a reduced tendency to sample evaporation. Unlike with water-Carbopol fluids, the proposed fluid does not require a neutralization step for its preparation, and it does not display wall slip, thus minimizing measurement artifacts. The temperature-dependent flow curves were measured using standard cone and plate geometry over 6 decades of the shear rate. The measurements were fitted using the recently proposed three component (TC) model1 and the more commonly used Herschel-Bulkley (HB) model for yield stress fluids. We compared the two models in terms of a) closeness of fit to the data, b) insights into the microstructural processes. The TCM model showed substantial advantages over HB on both items. We also present an analytical solution of the TC model in laminar pipe flow to predict flow rate and pressure drop.

1 Caggioni M, Trappe V, Spicer PT. Variations of the Herschel–Bulkley exponent reflecting contributions of the viscous continuous phase to the shear rate-dependent stress of soft glassy materials. Journal of Rheology. 2020 Mar 5;64(2):413-22.