Research project

Multiscale experimental and computational descriptions of interactive forces in granular multiphase mixtures
In Finnish: Kokeellinen ja laskennallinen moniskaalakuvaus rakeisten monifaasiseosten sisäisistä voimavaikutuksista

Project Details

Start date: 01/09/2017

End date: 31/08/2021


Academy of Finland


The role of scientific research is vital in understanding
the key phenomena and processes involved in advanced technologies. The
environmental concerns require special consideration in all technologies
related to energy, chemical, manufacturing and similar industries. Gas-solid
multiphase flow systems are scientifically very challenging to study because of
complexities which make their modeling very hard to precisely and reliably
predict. A broad application of the gas-solid multiphase flows in fluidized bed
(FB) technology used in boilers, gasifiers, plants for calcium looping in
carbon capture and storage, and plants for chemical looping indicate that any
improvement in scientific views into the processes associated with gas-solid
systems can substantially improve the related technology for better
performance. In practical terms, it means a lower cost with lower negative
impacts on environment. This project aims at developing a multiscale approach
to treat the core factor in gas-solid multiphase systems, which is known as the
drag force between phases. More specifically, this project focuses on systems
which contain solid phases with granular particles of large size ratios (over
10). Some preliminary computational studies conducted by the principal investigator
(PI) of project have shown the significant failure of existing continuum
formulation in estimation of drag forces. This consequently leads to
inefficient, inaccurate and unreliable Eulerian two-fluid model computer
simulations of gas-solid systems such as in FB plants for various industrial
applications mentioned above. The multiscale approach in the project relies on
both experimental and computational methods in collaboration with a leading
physicist in experimental granular matter from Duke University, and a
mathematician from New Jersey Institute of Technology. The collaborations are
both to study the two-dimensional systems. The three-dimensional systems will
be also studied experimentally and computationally in internal collaboration
within Lappeenranta University of Technology. The PI and collaborating groups
are experts in related fields with distinguished scientific knowledge and
skills. In addition to scientific and technological outcome of project, it will
have many indirect impacts on society as well by making positive economic
effects on above-mentioned industries as well as helping for reducing the
emissions with damaging environmental effects.

LUT Focus Areas

Last updated on 2018-30-04 at 10:25