Multiscale Modelling and Simulation (DFG-Heisenberg-Program)

Motions with different length scales were traditionally studied within different disciplines. This can be demonstrated by the study of fluid flow and heat transfer problems: “Molecular Dynamics” focuses on the microscopic movements of fluid atoms and molecules; Continuous fluids which are composed of a large amount of molecules are the subject of “Fluid Mechanics”; The behavior of the flows and heat transfer in a large system, e.g. a gas turbine, are usually assessed by the tools in “Thermodynamics”. However, one discipline is often insufficient for solving real industrial problems, since the macroscopic models are often lack of accuracy while the microscopic models are too expensive for real applications. A multi-disciplinary study which covers different length and time scales is demanded to solve industrial problems accurately.

Our research field is located at the interfaces of different scales of motions, e.g. the interface between “Fluid Mechanics” (small scale) and “Thermodynamics” (large scale). The purpose of our study is connecting the studies of different disciplines. Particular attention will be paid to the multiscale modeling and optimization of various flow, heat transfer and mass transfer problems. Through the microscopic analysis we try to better understand the physics. The achievements of our fundamental studies will be used to improve the accuracy of macroscopic models, and thus employed in solving real engineering problems.  

Our research topics include:

   -  Turbulence modeling;

   -  Porous medium flows and heat storage;

   -  Bio-fluid mechanics;

   -  Simulation and minimizing of the losses in gas turbines;

   -  Bubbly flows.

The methods used in our research include:

   -  Finite Volume Method;

   -  Lattice Boltzmann Method;

   -  Second Law Analysis.