<div dir="ltr">Hi Jon,<div><br></div><div>FLASH always evolves all three vector components of velocity, and magnetic field in the case of MHD. After running setup you should see in the auto-generated header file, "Flash.h", the variable definitions (e.g., VELX_VAR, VELY_VAR & VELZ_VAR). </div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr" style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px">*************************************************************************</div><div dir="ltr" style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px">Adam Reyes<div><img src="https://flash.rochester.edu/site/common/images/email_signature/FLASH.jpg"><br></div><div>Code Group Leader, Flash Center for Computational Science <span> </span><br></div><div>Research Scientist, Dept. of Physics and Astronomy</div><div>University of Rochester</div><div>River Campus: Bausch and Lomb Hall, 369 <span> </span><br></div><div>500 Wilson Blvd. PO Box 270171, Rochester, NY 14627</div><div dir="ltr">Email<span> </span><a href="mailto:adam.reyes@rochester.edu" target="_blank">adam.reyes@rochester.edu</a></div><div>Web<span> </span><a href="https://flash.rochester.edu/" target="_blank">https://flash.rochester.edu</a><br></div><div> (he / him / his)</div><div><img src="https://flash.rochester.edu/site/common/images/email_signature/FLASH-pride-sml.png"><br></div>*************************************************************************</div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Dec 28, 2022 at 11:07 AM Slavin, Jonathan <<a href="mailto:jslavin@cfa.harvard.edu">jslavin@cfa.harvard.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Hi,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">I'm interested in carrying out 2.5 D or maybe 1.5 D simulations with Flash, and am wondering what I need to do in order to make that work. There is mention of 2.5 D simulations in the manual, but no description of how to do such simulations. To be clear, by half dimension I mean a direction for which vectors can have components but which no quantities can depend. So for example the magnetic field could consist of components Bx(x,y), By(x,y), Bz(x,y). Or for 1.5 D Bx(x), By(x).</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">There are many places with Flash code with conditionals like</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">if (NDIM == 3)...</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">It seems that for 2.5 D, I'd need to set NDIM to 2, but then it's unclear to me if the z component of vectors will be included in the calculations.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Any help would be appreciated.</div><div><br></div><div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Thanks,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Jon</div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><img src="https://lh6.googleusercontent.com/mJuf9zI6QC5w6HPVCinnLSkpp-RgufOfl7nw1E_aghDflNhusoRbZTuP_0x-RkECQRhIfvPxGMe6zSt6chyXZ7D5DdqtkZPp0q-TE8itKny8VWObWAiZ1aurYWDO0CtZgvJEXfzu" width="350" height="2" style="font-size: 12.6667px; font-family: Arial; white-space: pre-wrap; border: none;"></div><div dir="ltr">Jonathan D. Slavin (he/him)</div><div dir="ltr">Astrophysicist - High Energy Astrophysics Division</div><div dir="ltr">Center for Astrophysics | Harvard & Smithsonian</div><div dir="ltr">Office: (617) 496-7981 | Cell: (781) 363-0035<br>60 Garden Street | MS 04 | Cambridge, MA 02138</div></div><div dir="ltr"><span><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:9.5pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><img src="https://lh6.googleusercontent.com/mJuf9zI6QC5w6HPVCinnLSkpp-RgufOfl7nw1E_aghDflNhusoRbZTuP_0x-RkECQRhIfvPxGMe6zSt6chyXZ7D5DdqtkZPp0q-TE8itKny8VWObWAiZ1aurYWDO0CtZgvJEXfzu" width="350" height="2" style="border: none;"></span><span style="font-size:9.5pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><br></span></p></span></div></div></div></div></div></div></div></div>
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