Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/45274
Title: Thermodynamic approach to rheology of complex fluids: Flow-concentration coupling
Author: Aguilar-Garnica, E.
García-Sandoval, J.P.
Issue Date: 2001
Abstract: In this chapter we summarize the use of the Method of Characteristics (MC) in the solution of estimation and control problems for processes whose model is given by First-Order Partial Differential Equations or Hyperbolic systems. First, a dynamical robust observer is built with the MC for a non-isothermal plug flow reactor whose state variables travel along one characteristic line. Then, this observer in its integral equation version is designed for a solid-waste anaerobic digestion process which is described by a set of variables that follow different characteristic lines. In both cases the aim of the observers is to estimate the evolution of certain specific variables which is necessary to monitor but whose measurement becomes difficult either because do not exists the suitable analytical techniques or because such measurement is relatively expensive. Finally, the chapter is closed with an analysis of a robust control law derived with the MC for a heat exchanger in which a time-variant characteristic line is involved. The performance of the observers and the control law is analyzed with simulation experiments obtaining satisfactory results. "2011 Nova Science Publishers, Inc. All rights reserved.",,,,,,,,,"http://hdl.handle.net/20.500.12104/45274","http://www.scopus.com/inward/record.url?eid=2-s2.0-84892050295&partnerID=40&md5=eda61d046b51cb22b53b53d59fc79c8c",,,,,,,,"Partial Differential Equations: Theory, Analysis and Applications",,"97
140",,,,"Scopus",,,,,,,,,,,,"The role of the method of characteristics in the solution of estimation and control problems for hyperbolic PDE systems",,"Book Chapter" "47128","123456789/35008",,,"Castillo Girón, Víctor Manuel",,"2001",,,,,,,,,,"0187-7674",,"http://hdl.handle.net/20.500.12104/45349",,"Español",,,,"76",,"Confines de relaciones internacionales y ciencia política",,"mar-14",,"13",,"CLASE",,,,,,,,"Economía agrícola",,"Jitomate, actores y controversias en Sayula, Jalisco",,,,"journalArticle", "47036","123456789/35008",,"Ruano Ruano, L., Universidad de Guadalajara, Estudiante Del Doctorado en Ciências Sociales Dei Colegio de Jalisco, Mexico",,"Ruano Ruano, L.",,"2010",,"[No abstract available]",,,,,,,,,"http://hdl.handle.net/20.500.12104/45257","http://www.scopus.com/inward/record.url?eid=2-s2.0-84907077145&partnerID=40&md5=4d32f69ad83378e3456ef12956d5e432",,,,,,,,"CISCI 2010 - Novena Conferencia Iberoamericana en Sistemas, Cibernetica e Informatica, 7to Simposium Iberoamericano en Educacion, Cibernetica e Informatica, SIECI 2010 - Memorias",,"66
69",,"2",,"Scopus",,,,,,,,,,,,"The record of evidences for social analysis: The audio recordings and videos [El registro de testimonios para el análisis social: Las audiograbaciones y los videos]",,"Conference Paper" "47123","123456789/35008",,"García-Rojas, B., Instituto de Investigaciones en Materiales, Facultad de Química, UNAM, A.P. 70-360, México, Distrito Federal 04510, Mexico; Bautista, F., Departamentos de Física and Ingeniería Química, Universidad de Guadalajara, Boulevard M. García Barragán 1451, Guadalajara, Jal 44430, Mexico; Puig, J.E., Departamentos de Física and Ingeniería Química, Universidad de Guadalajara, Boulevard M. García Barragán 1451, Guadalajara, Jal 44430, Mexico; Manero, O., Instituto de Investigaciones en Materiales, Facultad de Química, UNAM, A.P. 70-360, México, Distrito Federal 04510, Mexico",,"García-Rojas, B.
Bautista, F.
Puig, J.E.
Manero, O.",,"2009",,"In this work, the generalized Bautista-Manero-Puig (BMP) model derived from extended irreversible thermodynamics (EIT) is used to analyze the coupling of stress with concentration in complex fluids. It is shown that this model is consistent with previous analyses that predict mechanical and thermodynamic instabilities in the shear-banding regime. In particular, for simple shear flows, the model presented here predicts the structure factor in the plane of shear and the onset of instabilities in the gradient-vorticity plane. Furthermore, the model predicts distinctive features of the models of Brochard-de Gennes and Schmitt as particular cases. For finite stress relaxation time, the generalized BMP model allows the prediction of transient structures normal to the vorticity axis. Instabilities are predicted in the regions of high viscosity, which suggest that the induction of a more viscous phase in a shear-thickening solution can lead the system to instability, in this case, the layering is predicted perpendicular to the vorticity direction. These transient structural patterns within the shear-thickening region correspond to spinodal phase separation. When the mechanical and thermodynamic instabilities are uncoupled, the model predictions agree with experiments and with the transient-gel model of Brochard and de Gennes. " 2009 The American Physical Society.
URI: http://hdl.handle.net/20.500.12104/45344
http://www.scopus.com/inward/record.url?eid=2-s2.0-70349941548&partnerID=40&md5=567422daa5a24ac985b9525b5a63ea90
Appears in Collections:Producción científica UdeG

Files in This Item:
There are no files associated with this item.


Items in RIUdeG are protected by copyright, with all rights reserved, unless otherwise indicated.