Lecture Announcement
Prof. Dr. Sergei Molokov
Coventry University, UK
MHD problems in fusion
Research in magnetohydrodynamic flows in liquid metal systems for
fusion has a long history, going back to 35 years. This has been
a stimulating factor for the development of fundamental and applied
aspects of high-field magnetohydrodynamics. The advancement of
international fusion project, ITER, brings R&D needs in the field to
a new level. Fundamental and engineering aspects of liquid metal,
cooling systems (blankets and divertors) of fusion reactors are
discussed. These devices employ a liquid metal (lithium or lithium
lead alloy) as a cooling medium. One of the most important problems
for the liquid-metal flows is the magnetohydrodynamic (MHD) interaction.
When a liquid metal flows in a magnetic field, electric currents
are induced. These currents in turn interact with the magnetic field
and the resulting electromagnetic force induces high MHD pressure drop
and significant distortions of the velocity profile. These effects
have direct influence on the performance of the reactor, and ought
to be understood. MHD interaction has peculiar effects on flow patterns
in complex duct flows, such as bends, expansions, manifolds, and free
surface flows, such as liquid metal films, rivulets, jets, and drops.
Fundamental issues of liquid metal flows in high magnetic field are
discussed, and an outlook for research on stability and transition
to turbulence in liquid metal flows, and their implications on heat
transfer is given.
| Place: | FZR, Seminarraum Geb. 120 |
| Time: | 31.03.05, 10:00 Uhr |
