Hydrodynamic theory of wet particle systems - Modeling, simulation and validation based on microscopic and macroscopic descriptions

点击翻译按钮获取中文摘要

The objective of the proposed research project is to develop a hydrodynamic description of the flow of wet granular materials, which is based on detailed knowledge of the links between micro-scale and macro-scale material parameters. The main targets of the project are (i) the formulation of suitable constitutive equations for the stress-strain relations, specifically for wet granular materials, (ii) the deduction of the parameters in the constitutive equations from discrete element simulations, (iii) the validation of the micro-macro transition with data from suitable experiments with wet granular materials and (iv) the development of new, more efficient macroscopic simulation tools to model realistic, large-scale experiments. As the main working hypothesis, it is assumed that the constitutive stress-strain relations can be described by generalized fluid dynamics-like models, where the parameters of the constitutive model depend on local flow parameters, like e.g. density, pressure, shear rate or volume fractions of the wetting liquid and of the particulate solid phase, respectively.