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DTSTAMP:20190719T085744Z
LOCATION:HG E 1.1
DTSTART;TZID=Europe/Stockholm:20190614T103000
DTEND;TZID=Europe/Stockholm:20190614T110000
UID:submissions.pasc-conference.org_PASC19_sess116_msa119@linklings.com
SUMMARY:Challenges in MHD Modelling in Fusion Devices
DESCRIPTION:Minisymposium\nComputer Science and Applied Mathematics, Physi
 cs\n\nChallenges in MHD Modelling in Fusion Devices\n\nHuijsmans\n\nThe ma
 in goal of the ITER project is to create plasmas producing about 500 MW of
  fusion power. Due to its large size, the thermal energy (350MJ) of ITER p
 lasmas will be much larger than current experiments. Magnetohydrodynamic (
 MHD) instabilities can cause fast losses of the thermal plasma energy. In 
 ITER, these MHD induced energy losses will be much larger than in present 
 experiments. Simulations of MHD instabilities are required to predict thei
 r consequences in ITER. The MHD code JOREK has been developed within the E
 U fusion program for this purpose. The 3D non-linear MHD simulations are c
 hallenging due to the complex toroidal geometry, the very high magnetic Re
 ynolds numbers and the large anisotropy. Parallelisation of the fully impl
 icit time evolution scheme is a significant problem. Traditionally, MHD si
 mulations in fusion devices use a fluid description. However, this is not 
 sufficient to accurately model the interaction of the plasma with the wall
 s. The evolution of discrete particles and their back reaction on the plas
 ma have recently been implemented. The resulting fluid-kinetic formulation
  significantly increases the computational requirements. Some illustrative
  examples of MHD instabilities will be presented.
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