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A general computation model based on inverse analysis principle used for rheological analysis of W/O rapeseed and soybean oil emulsions

Abstract : The present research paper proposes the validation of a rigorous computation model used as a numerical tool to identify rheological behavior of complex emulsions W/O. Considering a three-dimensional description of a general viscoplastic flow it is detailed the thermo-mechanical equations used to identify fluid or soft material's rheological laws starting from global experimental measurements. Analyses are conducted for complex emulsions W/O having generally a Bingham behavior using the shear stress - strain rate dependency based on a power law and using an improved analytical model. Experimental results are investigated in case of rheological behavior for crude and refined rapeseed/soybean oils and four types of corresponding W/O emulsions using different physical-chemical composition. The rheological behavior model was correlated with the thermo-mechanical analysis of a plane-plane rheometer, oil content, chemical composition, particle size and emulsifier's concentration. The parameters of rheological laws describing the industrial oils and the W/O concentrated emulsions behavior were computed from estimated shear stresses using a non-linear regression technique and from experimental torques using the inverse analysis tool designed by A. Gavrus (1992-2000). © 2017 Author(s).
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01671674
Contributor : Laurent Jonchère <>
Submitted on : Friday, December 22, 2017 - 2:53:58 PM
Last modification on : Monday, January 20, 2020 - 10:26:05 PM

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I. Vintila, A. Gavrus. A general computation model based on inverse analysis principle used for rheological analysis of W/O rapeseed and soybean oil emulsions. 20th International ESAFORM Conference on Material Forming, ESAFORM 2017, Apr 2017, Dublin, Ireland. ⟨10.1063/1.5008169⟩. ⟨hal-01671674⟩

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