- Identification: GA103/05/2311 - Grant Agency of the Academy of Sciences of the Czech Republic
- Duration: 2005 - 2007
- Principal investigator: Petr Filip CSc.
- Co-investigator: Doc. Ing. Martin Zatloukal PhD. (Faculty of Technology, Tomas Bata
University)
Subject of research
A wide variety of new industrially used or produced materials and products is expected to exhibit tailor-made flow properties of the final product and fulfil the requirements of desired final performance. Control of such properties usually depends on theknowledge of process variables as well as on the ability to measure and mathematically characterise meaningful flow properties information. Constitutive models represent one of the basic points for characterisation of materials behaviour and consecutive description of flow for the given geometrical arrangements. The aim of the proposed project is to present a new phenomenological rheological model suitable for the description of a wide class of viscoelastic fluids that exhibit nonmonotonous dependenceof viscosity on deformation characteristics, this model should be sufficiently flexible to respect local extremes (maximum, minimum) and Newtonian plateau including an intermediate one; a number of entry parameters will be minimised; to modify and
Research Goal
The selected differential constitutive models (XPP, PTT-XPP, and modified Leonov models) were analysed with the aim to evaluate both, their predicting/fitting capabilities and ability to determine the structural characteristics of macromolecular chains.
