Objective
This project is devoted to the investigation of the onset and development of instability for different nonlinear processes in continua, including localized ground states in rods and elastic bodies, diffusion-reaction processes, flows in porous domains, thin films, and states in astrophysical applications. The aim of the project is to develop a direct collaboration between specialists in pure and applied science from different institutes in Russia, Ukraine, Georgia, France, Italy, and UK in order to elaborate general scientific methods for the analysis of instability and apply them to specific problems of continuum mechanics. The following stages of instability will be studied in detail: - Transition to instability: we plan to conduct a spectral analysis of the transition to instability and reveal its dependence on the character of nonlinearity and on the parameters of the problems under consideration. - Development of instability: we plan to carry out an asymptotic analysis above the threshold of instability and to find sharp asymptotics for the behaviour of solutions both at infinity and near singular points. - Pattern formation and blow-up: we aim to obtain conditions for the occurrence of blow up (the so-called critical exponents) and to estimate the lifespan of blow-up solutions in terms of the parameters and data of the problems under consideration (including the asymptotic behaviour of initial values at infinity). First stage: transition to instability. The analysis of this stage is based on spectral methods applied to the corresponding equations for perturbations. We will consider both linear and nonlinear inhomogeneous spectral problems, aiming to find an explicit dependence of the characteristics of stability on the data of the nonlinear problems under investigation (initial-boundary values, physical parameters, etc.). Second stage: development of instability. The analysis of this stage is based on asymptotic methods adapted to the essential nonlinearity of the processes. In particular, we will place emphasis on the existence of a branching set of solutions to a limiting stationary equation and on the rate (either exponential, algebraic, or logarithmic) of convergence of a given dynamical process to a stationary state. Third stage: pattern formation and blow-up. The analysis at this stage uses both known methods (self-similar analysis, comparison method, etc.) and a new approach called the method of nonlinear capacity. In this approach, test functions of a special form are used that are constructed in a special way for each separate nonlinear problem. The approach has many advantages because it does not use comparison and maximum principles, is universal, and allows one to obtain sharp (unimprovable) critical exponents. We will analyse, in particular, complete blow-up for stationary states and instantaneous blow-up for evolutionary processes, as well as gradient catastrophes and problems with nonlocal interactions.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
This project has not yet been classified with EuroSciVoc.
Be the first one to suggest relevant scientific fields and help us improve our classification service
You need to log in or register to use this function
Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Data not available
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Data not available
Coordinator
TOURS
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.