Browsing Institutt for teoretisk astrofysikk by Author "Wissing, Robert"
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Wissing, Robert; Hobbs, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)We present a new analytical equation of state (EOS), which correctly models high pressure theory and fits well to the experimental data of ɛ-Fe, SiO2, Mg2, and the Earth. The cold part of the EOS is modeled after the Varpoly ...
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Wissing, Robert; Hobbs, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)Observed FeO/MgO ratios in the Moon and Earth are inconsistent with simulations done with a single homogeneous silicate layer. In this paper we use a newly developed equation of state to perform smoothed particle hydrodynamics ...
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Wissing, Robert; Shen, Sijing; Wadsley, James; Quinn, Thomas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)The magnetorotational instability (MRI) is an important process in driving turbulence in sufficiently ionized accretion disks. It has been extensively studied using simulations with Eulerian grid codes, but remains fairly ...
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Wissing, Robert (Doctoral thesis / Doktoravhandling, 2022)When we look out at the universe, we find that magnetic fields are everywhere. From solar flares to the launching of jets, magnetic fields play an important role for a wide range of systems. This includes galaxies, which ...
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Wissing, Robert; Shen, Sijing (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)We present a novel method of magnetohydrodynamics (MHD) within the smoothed particle hydrodynamics scheme (SPMHD) using the geometric density average force expression. Geometric density average within smoothed particle ...