Anisotropic viscous dissipation in transient reconnecting plasmas

Anisotropic viscous dissipation in compressible magnetic X-points

Context. Visco-resistive damping in line-tied magnetic X-points is examined. Aims. The goal is to determine whether fast, Alfvénic energy dissipation is possible for X-point disturbances damped by the plasma resistivity and non-isotropic viscosity. Methods. The response of X-points to planar and axial perturbations is explored numerically by solving the linearized compressible MHD equations in ...

Viscous Damping of Alfvenic Turbulence in Plasmas

We consider viscous damping of both strong and weak Alfvenic turbulence in fully ionized plasmas. We find that the damping is affected by the wandering of magnetic field lines, which makes the effective viscosity scale-dependent. We show that the strong turbulence cascade gets into the viscosity-damped regime at the scale that is larger than the ion mean free path by a ratio of thermal to Alfve...

Viscous dissipation effects in microtubes and microchannels

The effects of viscous dissipation on the temperature field and ultimately on the friction factor have been investigated using dimensional analysis and experimentally validated computer simulations. Three common working fluids, i.e., water, methanol and iso-propanol, in different conduit geometries were considered. It turns out that for microconduits, viscous dissipation is a strong function of...

Dissipation range turbulent cascades in plasmas

Nanofluidics: viscous dissipation in layered liquid films.

We studied the layer-by-layer collapse of molecularly thin films of a model lubricant confined between two atomically smooth substrates. The dynamics of the consecutive expulsion of four molecular layers were found to slow down with decreasing film thickness but showed no evidence for confinement-induced solidification. Using a hydrodynamic model, we show that the sliding friction of liquid lay...