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<div>I’ve also encountered this same issue at refinement jumps with USM. I could never get HLLD to behave. What I found was ok was to use HLLC with high-order electric field construction. Then, even better, I turned on magnetic resistivity with a small value.
That smoothed things out nicely. <br>
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<div>May “belief” at this point is that either: 1) staggered mesh CT simply does not behave well with AMR, or 2) the prolongation/restriction routines in PARAMESH for face variables is bugged somehow. </div>
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<div><span style="caret-color: rgb(213, 218, 222);">John Z., Is this for the mesh refinement versions of Athena and Athena++? Or uniform grids? </span><br>
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<div>Sean</div>
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On Mar 29, 2019, 7:08 AM -0400, John ZuHone <jzuhone@gmail.com>, wrote:<br>
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Hi Jonathan and all,<br>
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I also wonder if similar AMR + finite volume MHD codes exhibit this issue.<br>
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I can verify that this does not happen in Athena or Athena++. Not sure about Enzo or GAMER, which are the two codes which come to mind.<br>
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John</blockquote>
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