2009.02.23

211, Eigineering 2nd Bld, Hongo Campus

Professor G. Bergeles 

Mechanical Engineering Department, National Technical University of Athens-Greece

Title：Applied research in an Industrial Aerodynamics laboratory and recent CFD work on droplet dynamics

Schedule：14:00  ~ 15:00   23rd Feb 2009

Place：211, Engineering 2nd Bld, Hongo Campus

Abstract：

The lecture will be made up from two parts.

In the first part the activities of the lecturer’s industrial aerodynamics laboratory will be presented; these are aimed at solving engineering problems of immediate relevance to industry, as air pollution problems, designing of lignite boilers, optimizing electrostatic filters, designing and constructing wind generators and fouling of heat exchangers. For tackling such problems both experimental and CFD standard tools are used.

In the second part of the lecture the work of the lecturer’s group on droplet dynamics is presented; the VOF methodology within a finite volume methodology is used. For tracking accurately the liquid gas interface a dynamically adaptive local grid refinement technique is employed. Various cases will be examined as droplet impinging on liquid film or collision of two equal or unequal size droplets. The effects of Weber and Ohnesorge numbers on the dynamics of the droplet collision process are quantified.

Relevant publications:

1.       Simulation of sharp gas–liquid interface using VOF method and adaptive grid local refinement around the interface, Int. J. Numer. Meth. Fluids 2004; 45:421–439

2.       Three-dimensional numerical investigation of a droplet impinging normally onto a wall film, Journal of Computational Physics 225 (2007) 322–341

3.       A numerical investigation of central binary collision of droplets, Computers & Fluids xxx (2009) xxx–xxx