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<body class='hmmessage'><div dir='ltr'> Dear FLASH users and developers,<br><br>could somebody give me some more details about the interpolation procedure implemented in gr_hgProlongBndries.F90 by the direct solver of the multigrid Poisson solver to prolong the solution at the boundaries of each block.<br>In other words, I would like to know how the interpolating coefficients used by Ricker (``A direct multigrid Poisson solver for oct-tree adaptive meshes'', The astrophysical journal supplement series, 300, 2008) and defined in gr_hgInit.F90 (i.e. the variables Pns, Pew, Pud) have been obtained. In particular, where the origin of the interpolation is located? In which sense the procedure is "conservative?"<br><br>Thank you in advance for your kind help.<br><br>Best regards,<br><br> Marco Mazzuoli<br><pre><font style="font-size:10pt;" size="2" color="#17365D"><br>Dr. Marco Mazzuoli</font><font style="font-size:10pt;" size="2" color="#17365D"><br></font><font style="font-size:10pt;" size="2" color="#17365D">Department of Civil,</font><font style="" color="#17365D"> </font><font style="font-size:10pt;" size="2" color="#17365D"><font style="font-size:10pt;" size="2">C</font>hemical</font><font style="font-size:10pt;" size="2" color="#17365D"><font style="font-size:10pt;" size="2"> and<br></font></font><font style="font-size:10pt;" size="2" color="#17365D"><font style="font-size:10pt;" size="2"></font></font><font style="font-size:10pt;" size="2" color="#17365D"><font style="font-size:10pt;" size="2">Environ<font style="font-size:10pt;" size="2">mental Engineering</font></font> (DIC<font style="font-size:10pt;" size="2">CA</font>)</font><font style="font-size:10pt;" size="2" color="#17365D"><br>University of Genoa<br></font><font style="font-size:10pt;" size="2" color="#17365D">via Montallegro 1</font><font style="font-size:10pt;" size="2" color="#17365D"><br></font><font style="font-size:10pt;" size="2" color="#17365D">16145 GENOVA (ITALY</font><font style="font-size:10pt;" size="2" color="#17365D">)<br></font><font style="font-size:10pt;" size="2" color="#17365D">Tel. +39 010 3532490</font><font style="font-size:10pt;" size="2" color="#17365D"><br>Cell. +39 338 7142904<br></font><font style="font-size:10pt;" size="2" color="#17365D">e-mail marco.mazzuoli@unige.it</font><font style="font-size:10pt;" size="2" color="#17365D"><br></font><font style="font-size:10pt;" size="2" color="#17365D"> marco.mazzuoli84@gmail.com<br></font><font style="font-size:10pt;" size="2" color="#17365D"><img alt=""></font><br><br><br><br></pre> </div></body>
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