Title :
Dust Clouds and Porous Objects Being Charged by Flowing Plasmas
Author :
Miloch, Wojciech J. ; Vladimirov, Sergey V.
Author_Institution :
Inst. of Theor. Astrophys., Univ. of Oslo, Oslo, Norway
Abstract :
The charging of dust clouds and finite-sized porous insulating objects in flowing plasmas is studied by numerical simulations. Objects of regular and irregular shapes and different opacities (porosities) are investigated for different electron-to-ion temperature ratios and flow velocities. It is demonstrated that the opacity of the cloud or the porosity of an object has little effect on the plasma dynamics in their vicinity. The plasma can charge the interior of the objects, which can lead to a nontrivial contribution to the electric dipole moment and internal electric fields. The analysis is carried out in two spatial dimensions with the particle-in-cell DiP2D code.
Keywords :
clouds; dust; dusty plasmas; electric moments; flow simulation; flow through porous media; numerical analysis; opacity; plasma flow; plasma simulation; plasma temperature; porosity; porous materials; cloud opacity; dust clouds charging; electric dipole moment; electron-ion temperature ratio; finite-sized porous insulating objects charging; flowing plasmas; internal electric fields; irregular-shaped objects; numerical simulations; object porosity; particle-in-cell DiP2D code; plasma dynamics; plasma flow velocity; regular-shaped objects; two-spatial dimensions analysis; Clouds; Councils; Dusty plasma; Gravity; Insulation; Plasma simulation; Plasma temperature; Plasma waves; Surface charging; Terrestrial atmosphere; Charging; dust clouds; particle in cell; plasma flow; porous object; simulation;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2010.2055161
