English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the zaia usage as premium feature

ZAIA

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the access of premium content as premium feature

Premium Content

Zendy Tools

Zendy Open

(abridged) There exists a substantial disagreement between computersimulation results and high-energy density laboratory experiments of theRayleigh-Taylor instability Kuranz et al. (2010).  We adopt the Braginskii formulation for transport in hot, dense plasma,implement and verify the additional physics modules, and conduct acomputational study of a single-mode RTI in two dimensions with variouscombinations of the newly implemented modules.  We find that magnetic fields reach levels on the order of 11 MG in theabsence of thermal conduction. We observe denting of the RT spike tip andgeneration of additional higher order modes as a result of these fields.Contrary to interpretation presented in earlier work Nishiguchi (2002), theadditional mode is not generated due to modified anisotropic heat transporteffects but due to dynamical effect of self-generated magnetic fields.  The main effects of thermal conduction are a reduction of the RT instabilitygrowth rate (by about 20% for conditions considered here) and inhibited mixingon small scales. In this case, the maximum self-generated magnetic fields areweaker (approximately 1.7 MG). These self-generated magnetic fields are of verysimilar strength compared to magnetic fields observed recently in HEDlaboratory experiments Manuel et al. (2012).  We find that thermal conduction plays the dominant role in the evolution ofthe model RTI system considered. It smears out small-scale structure andreduces the RTI growth rate. This may account for the relatively featureless RTspikes seen in experiments, but does not explain mass extensions observed inexperiments.  Resistivity and related heat source terms were not included in the presentwork, but we estimate their impact on RTI as modest and not affecting our mainconclusions. Resistive effects will be discussed in detail in the next paper inthe series.

The Braginskii model of the Rayleigh-Taylor instability. I. Effects of self-generated magnetic fields and thermal conduction in two dimensions