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Published in: Rheologica Acta 12/2021

08-10-2021 | Original Contribution

Compatibility of the generalized BMP model and the two-fluid Langevin formulations

Authors: C. Fierro, F. Bautista, J. P. García-Sandoval, E. Hernández, J. E. Puig, O. Manero

Published in: Rheologica Acta | Issue 12/2021

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Abstract

The main objective of this work is to demonstrate the agreement between the two-fluid linear Langevin formulation and that described by the extended irreversible thermodynamics (EIT). The two-fluid model, originally proposed by de Gennes, has been widely analyzed by many authors in various flow situations, especially to compare predictions with experimental data of the structure factor in many complex flows. The canonical Langevin equations together with the fluctuation-dissipation theorem ensure consistent thermodynamic behavior for constitutive equations. Therefore, agreement between the EIT formulation and the two-fluid Langevin equations demonstrates the thermodynamic consistency of the EIT formulation. Extension of this analysis to include normal stresses is also considered.

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Literature
go back to reference Jou D, Casas-Vázquez J, Lebon G (2010) Extended irreversible thermodynamics. 4th Ed. Berlin: Springer Jou D, Casas-Vázquez J, Lebon G (2010) Extended irreversible thermodynamics. 4th Ed. Berlin: Springer
go back to reference Jou D, Casas Vázquez J, Criado-Sancho M (2011) Thermodynamics of fluids under flow. 2nd Ed. Berlin: Springer Jou D, Casas Vázquez J, Criado-Sancho M (2011) Thermodynamics of fluids under flow. 2nd Ed. Berlin: Springer
go back to reference Öttinger HC, Grmela M (1997) Dynamics and thermodynamics of complex fluids. II. Illustrations of a general formalism. Phys Rev E 56:6633–6655CrossRef Öttinger HC, Grmela M (1997) Dynamics and thermodynamics of complex fluids. II. Illustrations of a general formalism. Phys Rev E 56:6633–6655CrossRef
Metadata
Title
Compatibility of the generalized BMP model and the two-fluid Langevin formulations
Authors
C. Fierro
F. Bautista
J. P. García-Sandoval
E. Hernández
J. E. Puig
O. Manero
Publication date
08-10-2021
Publisher
Springer Berlin Heidelberg
Published in
Rheologica Acta / Issue 12/2021
Print ISSN: 0035-4511
Electronic ISSN: 1435-1528
DOI
https://doi.org/10.1007/s00397-021-01290-4

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