|Series||Research notes in mathematics ;, 29|
|LC Classifications||TA418.2 .P47|
|The Physical Object|
|Pagination||254 p. :|
|Number of Pages||254|
|LC Control Number||81470802|
Elongational flow with an inherent low vorticity proves to be more efficient in extending polymer chains than simple shear flow and thus is more interesting from the point of view of basic (molecular chain dynamics at high deformation) and applied polymer science (rheology, fiber spinning, drag reduction, flow through porous media). Elongational flows: aspects of the behaviour of model elasticoviscous fluids. [C J S Petrie] Home. WorldCat Home About WorldCat Help. Search. Search for Library Items Search for Lists Search for Contacts Book\/a>, schema:CreativeWork\/a> ; \u00A0\u00A0\u00A0\n library. Elongational flow experiments with viscous polymeric material were conducted at a constant elongation rate on a modified tensile testing machine. Steady elongational and shear viscosity data and elon Cited by: (extensional flow) n. Flow caused by stretching a material, usually a hot melt, as in fiber drawing, film blowing, parison draw down, and biaxial stretching of sheet. This flow is always accompanied by a reduction in cross section. The rate of elongation, at any moment during one-dimensional, elongational flow.
A spherically collapsing gas bubble will create a uniaxial extension of the fluid surrounding it. This flow may be readily analyzed, and it is possible to relate observed experimental parameters such as the pressure inside the bubble and the bubble collapse rate to . This book sets out to provide a guide, with examples, for those who wish to make predictions about the mechanical and thermal behaviour of . There are three simple types of shear-free elongational flow experiments that can be conducted in the laboratory: Uniaxial elongational flow: The sample is stretched in one direction. v x = dε/dt; v y,z = -½ dε/dt. Biaxial elongational flow: The sample is stretched in two directions. v x = dε/dt; v y = dε/dt; v z = . The important point about an extensional flow is this: unlike viscometric and doubly superposed viscometric flows, the velocity field need not have zero divergence, although in viscoelastic fluids incompressibility demands that the velocity fields be isochoric. View chapter Purchase book Nucleation in Condensed Matter.
Elongational flow may be found in polymer operations such as fiber spinning, flat-film extrusion and film blowing (Cogswell, ). In the case of fiber spinning, a polymer melt also has to undergo shear flow in the capillary and uniaxial elongational flow for stretching purpose. Polymer melts belong to non-Newtonian fluids. 3. Locally Electro-Neutral Electro-Diffusion without Electric Current Computational Parametric Willmore Flow with Spontaneous Curvature and Area Difference Elasticity Effects. Brenn, G , Viscoelastic Polymer Solutions in Elongational Flow. in Proceedings of the 81st Annual Meeting of the International Association of Applied Mathematics and Mechanics.., pp. , Annual Meeting of the International Association of Applied Mathematics and Mechanics, Karlsruhe, Germany, 22/03/ This book sets out to provide a guide, with examples, for those who wish to make predictions about the mechanical and thermal behaviour of non-Newtonian materials in engineering and processing.