An improved ten-moment closure for reconnection and instabilities

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https://doi.org/10.1063/5.0012067
 http://hdl.handle.net/11603/22180

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UMBC Goddard Planetary Heliophysics Institute (GPHI)

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2020-08-21

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journal articles
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Ng, Jonathan et al.; An improved ten-moment closure for reconnection and instabilities; Physics of Plasmas 27, 082106, 21 August, 2020; https://doi.org/10.1063/5.0012067

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Abstract

The integration of kinetic effects in fluid models is important for global simulations of Earth's magnetosphere. The use of the two-fluid ten-moment model, which includes the pressure tensor for both species, has had some success in simulating Ganymede and Mercury with a simple closure model. We discuss a heat flux closure which accounts for some limitations of the earlier work while remaining computationally tractable. Comparisons with kinetic simulations for magnetic reconnection and lower-hybrid drift instabilities show good agreement with kinetic results and improvements on previous closure models.