Nonlinear simulation of magnetorotational instability using graphics processors

2015 Fiscal Year Final Research Report

• Project/Area Number: 24540533
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Plasma science
• Research Institution: The University of Electro-Communications
• Principal Investigator: Tatsuno Tomoya 電気通信大学, 情報理工学(系)研究科, 准教授 (60313011)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: プラズマ物理 / 高速計算 / グラフィックスプロセッサ

Outline of Final Research Achievements

In accretion disks, it has been known that the observed accretion rate cannot be explained by the classical theory. Magnetorotational instability, proposed in 1991, was a breakthrough in a sense that it could lead to magnetohydrodynamic instability of accretion disks and consequent turbulence by taking magnetic field into account. However, magnetohydrodynamic analyses assume local thermodynamic equilibrium, and it is pointed out that they did not fully explain the observed accretion rate in the limit of small collisionality.
In order to solve this issue, we have addressed theoretical analyses and numerical simulations by means of kinetic theory without assuming local thermodynamic equilibrium. We used recently-emerging graphics processors in numerical simulation, and also addressed the development of mathematical modelings.

Free Research Field

プラズマ物理