<div dir="ltr">Ian,<div> thanks a lot for your help.</div><div><br></div><div>Cheers,</div><div>Bruno</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno mer 3 nov 2021 alle ore 16:39 Ian Hawke <<a href="mailto:I.Hawke@soton.ac.uk">I.Hawke@soton.ac.uk</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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Yes; the "difference" is that the "num_flux" in the two cases are different (one will contain the lapse, the other not, as undensitized) [I think]. So the implemented case with the explicit averaged lapse at each interface should directly approximate the standard
form, but effectively uses a different reconstruction approach for gauge vs the rest of the flux.</div>
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I have memories of trying both approaches when playing with WENO reconstruction early on, and it making little difference. There should be no problem with scaling by any term that does not explicitly depend on terms within the hydro state vector.</div>
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<div id="gmail-m_9148409214219260702divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Roland Haas <<a href="mailto:rhaas@illinois.edu" target="_blank">rhaas@illinois.edu</a>><br>
<b>Sent:</b> 03 November 2021 15:31<br>
<b>To:</b> Ian Hawke <<a href="mailto:I.Hawke@soton.ac.uk" target="_blank">I.Hawke@soton.ac.uk</a>><br>
<b>Cc:</b> <a href="mailto:carpetx-developers@einsteintoolkit.org" target="_blank">carpetx-developers@einsteintoolkit.org</a> <<a href="mailto:carpetx-developers@einsteintoolkit.org" target="_blank">carpetx-developers@einsteintoolkit.org</a>><br>
<b>Subject:</b> Re: lapse terms in Whisky's fluxes</font>
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<div>CAUTION: This e-mail originated outside the University of Southampton.<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><p><font color="#000000">Pr<font face="arial, sans-serif">of. Bruno Giacomazzo<br>Department of Physics<br>University of Milano-Bicocca<br></font></font><span style="color:rgb(0,0,0)"><font face="arial, sans-serif">Piazza della Scienza 3<br></font></span><span style="color:rgb(0,0,0)"><font face="arial, sans-serif">20126 Milano<br></font></span><span style="font-size:12.8px;color:rgb(0,0,0)">Italy</span></p><p><font color="#000000"><span style="font-size:12.8px">email: </span><span style="font-size:12.8px"><a href="mailto:bruno.giacomazzo@unimib.it" target="_blank">bruno.giacomazzo@unimib.it</a><br></span><span style="font-size:12.8px">phone: (+39) 02 6448 2321</span></font><br><font color="#000000"><span style="font-size:12.8px">web: </span></font><span style="color:rgb(0,0,0);font-size:12.8px"><a href="http://www.brunogiacomazzo.org/" style="font-size:12.8px" target="_blank">http://www.brunogiacomazzo.org</a></span></p><p><font color="#000000">----------------------------------------------------------------------<br><span style="font-size:12.8px">There are only 10 types of people in the world:<br></span><span style="font-size:12.8px">Those who understand binary, and those who don't<br></span><span style="font-size:12.8px">----------------------------------------------------------------------<br></span></font></p></div></div></div></div></div></div></div>