We all instinctively poke, bounce, scoop, and observe materials to understand rheological properties quickly. Yet, these observations are rarely analyzed quantitatively. To address this, here we introduce the paradigm of protorheology: approximate quantitative inference from simple observations. Several case studies demonstrate how protorheology is an inclusive entry to rheology for a broad range of practitioners and strengthens the confidence and interpretation of accurate laboratory measurements. We survey a range of creative tests according to which rheological phenomenon is revealed. Some new working equations are derived, and all working equations are summarized for convenient reference and comparison across different methods. This establishes a framework to enable increased use of photos, videos, and quantitative inference and to support the increasing interest in digital image analysis, inverse methods, and high-throughput characterization being applied to rheological properties.
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January 2024
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January 02 2024
Protorheologya)
Mohammad Tanver Hossain
;
Mohammad Tanver Hossain
1
Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign
, Urbana, Illinois 618012
Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign
, Urbana, Illinois 61801
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Randy H. Ewoldt
Randy H. Ewoldt
b)
1
Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign
, Urbana, Illinois 618012
Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign
, Urbana, Illinois 618013
Materials Research Laboratory, University of Illinois Urbana-Champaign
, Urbana, Illinois 61801b)Author to whom correspondence should be addressed; electronic mail: [email protected]
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Mohammad Tanver Hossain
1,2
Randy H. Ewoldt
1,2,3,b)
1
Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign
, Urbana, Illinois 61801
2
Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign
, Urbana, Illinois 61801
3
Materials Research Laboratory, University of Illinois Urbana-Champaign
, Urbana, Illinois 61801
b)Author to whom correspondence should be addressed; electronic mail: [email protected]
a)
Perspective article.
J. Rheol. 68, 113–144 (2024)
Article history
Received:
March 21 2023
Accepted:
November 16 2023
Citation
Mohammad Tanver Hossain, Randy H. Ewoldt; Protorheology. J. Rheol. 1 January 2024; 68 (1): 113–144. https://doi.org/10.1122/8.0000667
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