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Theoretical, numerical and experimental investigation of two-phase gas-particle flows over bodies

Ziel

The proposed project is aimed at the addition to knowledge and the refinement of understanding of fundamental properties of two-phase gas-particle flows over bodies and obstacles, and more generally in the neighbourhood of a solid wall. Such flows, which are of frequent occurrence in human activities and natural phenomena, are involved for example in the fields of industrial equipments (drying, heating, conveying), erosion process, pollutant dispersion and deposition. In comparison with pure gas flows, two-phase flows are much more complicated in their structure and physical properties. The problem of dispersed two-phase flow over a body is of multidisciplinary character. It includes fluid dynamics, fluid-particle interactions (drag and lift forces, turbulence modulation), particle-wall interactions (impaction, deposition, surface erosion), as well as heat transfer.

The specific objectives of the project are focused upon investigation of the key features of the considered flows and include:
The study of the fine structure of gas-particle flows in a wide range of governing parameters (flows with and without particle-particle collisions, flows with and without inertial deposition of particles at the body surface, boundary layer effects, shielding effect);
An investigation of particle-turbulence interaction effects (clustering of particles, turbulence attenuation by fine particles, turbulence generation by the wakes behind inertial particles, influence of particles on heat transfer);
The study of the impaction phenomena between two particles (effect of concentration upon the properties of particle fluctuating motion) or between a particle and a rigid obstacle (conditions of particle deposition, scattering of particles rebounded from a rough surface, surface erosion);
A purposeful experimental study to obtain reliable data (flow fields, gas and particle parameters at the body surface, heat flux) with the aim of verification of theoretical and computational models and development of semiempirical models for some processes in two-phase flows;
A comparative analysis of different approaches and theoretical models used and developed in the project (model of collisionless gas of particles, two-fluid model, Eulerian-Lagrangian approach, kinetic model based on the statistical physics approach for description of the dispersed phase motion with inelastic particle-particle collisions, effect of one-way or two-way coupling).

The work programme of the project includes theoretical and experimental parts which are distributed between five teams equally.
A new level of understanding of some fundamental properties of two-phase flows over bodies is expected to be achieved.
The scientific result of the project will consist of newly-developed physical and mathematical models, explanation of some fine effects, elaboration of the limits of the validity of various theoretical approaches and clarification of the experimental data observed.

Aufforderung zur Vorschlagseinreichung

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Finanzierungsplan

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Koordinator

Henri Poincare University, Nancy, France
EU-Beitrag
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Adresse
rue Jean Lamour, 2
54519 Vandoeuvre-les-Nancy
Frankreich

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Beteiligte (4)