Title :
Viscoelasticity of 2D dusty plasmas
Author :
Feng, Yan ; Goree, John ; Liu, Bin
Author_Institution :
Dept. of Phys. & Astron., Univ. of Iowa, Iowa City, IA, USA
Abstract :
Summary form only given. In glow discharge plasmas, a suspension of dust particles can self-organize in a lattice structure, forming so called dusty plasma. The lattice structure is either solid or liquid-like, determined by plasma conditions. Depending on the lattice structure, viscoelasticity is the property of materials that exhibit both viscous and elastic characteristics. Most materials are viscoelastic; they both store and dissipate energy, with the relative proportions depending on frequency. So, the frequency-dependent viscosity, η(ω), is often used for the investigation of viscoelasticity. Besides η(ω), the wave vector dependent viscosity, η(k), is also used to study the viscoelastic character at different length scales. Motivated by two-dimensional (2D) dusty plasma experiments, we performed Langevin dynamical simulations to study the viscoelasticity of 2D dusty plasmas. In different conditions, both η(ω) and η(k) are calculated and compared.
Keywords :
dusty plasmas; glow discharges; plasma simulation; plasma transport processes; viscoelasticity; 2D dusty plasma viscoelasticity; Langevin dynamical simulation; dust particle suspension; elastic characteristics; energy dissipation; frequency-dependent viscosity; glow discharge plasma; lattice structure; viscous characteristics; wave vector dependent viscosity; Astronomy; Cities and towns; Dusty plasma; Elasticity; Frequency; Lattices; Physics; Plasma materials processing; Plasma properties; Viscosity;
Conference_Titel :
Plasma Science, 2010 Abstracts IEEE International Conference on
Conference_Location :
Norfolk, VA
Print_ISBN :
978-1-4244-5474-7
Electronic_ISBN :
0730-9244
DOI :
10.1109/PLASMA.2010.5534121