<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div dir="auto">Maybe you could edit whatever EOS routine you're using to artificially set the pressure(s) to some constant value. Not very physical, but it would presumably get rid of motion due to pressure gradients.<div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jun 3, 2020, 3:15 PM Ryan Farber <<a href="mailto:rjfarber@umich.edu">rjfarber@umich.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi flash-users,<div><br></div><div>I'm working on a (2D) test problem in FLASH4.6.2 in which I initialize a gaussian of gas energy density on an otherwise uniform medium with vx=vy=1.0.</div><div><br></div><div>I refine on gas energy density with lrefine_min = 6 and lrefine_max = 9 and update refinement every two steps (nref=2).</div><div><br></div><div>The purpose of the test is to confirm conservation of mass, momentum, and energy with AMR (and additionally to confirm AMR refinement/derefinement works correctly).</div><div><br></div><div>I have successfully run the problem; however, the gaussian spreads out presumably due to the pressure gradient between the blob and the ambient medium.</div><div><br></div><div>I've been perusing hy_uhd_: unsplit; unsplitUpdate; and now getFaceFlux but I haven't yet seen how I can turn off the inclusion of pressure gradients in the solution.</div><div><br></div><div>If you have a hint, I'd welcome it :)</div><div><br></div><div>Best,<br clear="all"><div><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr">--------<div>Ryan Farber</div><div>PhD Candidate</div><div>University of Michigan, Ann Arbor</div></div></div></div></div></div></div></div></div>
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