Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Polymerforschung     Collection: MPI Polymerforschung     Display Documents



  history
ID: 28682.0, MPI für Polymerforschung / MPI Polymerforschung
Convective nonlinearities for the orientational tensor order parameter in polymeric systems
Authors:Pleiner, Harald; Liu, M.; Brand, H. R.
Language:English
Date of Publication (YYYY-MM-DD):2002-06
Title of Journal:Rheologica Acta
Journal Abbrev.:Rheol. Acta
Volume:41
Issue / Number:4
Start Page:375
End Page:382
Review Status:No review
Audience:Not Specified
Abstract / Description:Nonlinear hydrodynamic equations for polymeric fluids with permanent or transient orientational order are discussed. We start from a description that utilizes the well-known nematohydrodynamic equations for low molecular weight uniaxial nematics. We concentrate on the reversible nonlinearities in the dynamic equation for the orientational tensor order parameter. The non-phenomenological part is unambiguously of the 'corotationally convected' or 'Jaumann' type. This holds also for the case of transient orientational order, which occurs in semi-flexible or rigid polymeric systems in the isotropic phase. The phenomenological part of the (nonlinear) reversible dynamics (flow alignment) is different for the isotropic and uniaxial case (the biaxial case is discussed in an Appendix). The corresponding form of the stress tensor is discussed. A comparison with existing phenomenological and mesoscopic models is given.
Free Keywords:nematic liquid crystalline polymers; orientational fluctuations; convective nonlinearities; stress tensor
Comment of the Author/Creator:Date: 2002, JUN
External Publication Status:published
Document Type:Article
Affiliations:MPI für Polymerforschung
External Affiliations:Univ Tübingen, Inst Theoret Phys, D-72076 Tübingen, Germany; Univ Bayreuth, D-95440 Bayreuth, Germany
Identifiers:ISI:000176725000012 [ID No:1]
ISSN:0035-4511 [ID No:2]
LOCALID:P-02-59
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.