<div dir="ltr"><div>Hi Madhav,</div><div><br></div>It worked for me, I am using FLASH4.6, try this:<div><br></div><div>1) Setup the "FlatPlate" case with -3d flag, with the following command. Here, instead of using a default name for object directory, I am naming the object directory as "Flat3D", and any other name will also work</div><div>./setup FlatPlate -objdir=Flat3D -3d -auto</div><div><br></div><div>2)Copy the "flash.par.3d_naca_tested" file available in "/source/Simulation/SimulationMain/FlatPlate/"; to the newly created object directory "Flat3D", as "flash.par"</div><div>cp /source/Simulation/SimulationMain/FlatPlate/
flash.par.3d_naca_tested Flat3D/flash.par</div><div><br></div><div>3) Compile the code, </div><div>make </div><div><br></div><div>4)The default case is "sim_number = 3 (naca2412);", and it is all set to run</div><div>mpirun -np 8 ./flash4<br><div>With just 8 processors, and "lrefine_max= 6", (the default value in flash.par), the MAXBLOCKS limit exceeds, by setting "lrefine_max= 5", I was able to run the simulation. If you have more processors, "lrefine_max = 6" should work too.</div><div><br></div><div>Let me know how it goes!</div><div><br></div></div><div><br></div><div><br></div><div>Thank you.<br>Best regards,<br>Prashant Tarey<br>PhD Student, Mechanical Engineering<br>Duke 273<br>UNC Charlotte<br>NC, USA.<br></div><div><br></div><div><br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Sep 26, 2021 at 11:33 PM Madhav Nagori <<a href="mailto:mnagori@uncc.edu">mnagori@uncc.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">Hi Prashant,<div><br></div><div>Thanks for your reply. Yes, I tried that. But the default cases are blowing up too.</div><div><br></div><div>Best,</div><div><br></div><div>Madhav</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Sep 26, 2021 at 2:55 PM Prashant Tarey <<a href="mailto:tarey.prashant@gmail.com" target="_blank">tarey.prashant@gmail.com</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">[<strong><font color="red">Caution</font></strong>: Email from External Sender. Do not click or open links or attachments unless you know this sender.]<br><span> </span><div><div dir="auto" style="border-color:rgb(0,0,0);color:rgb(0,0,0)">Hi Madhav,</div><div dir="auto" style="border-color:rgb(0,0,0);color:rgb(0,0,0)">Setup the case with -3d flag; in the object directory, replace the flash.par file with the flash.par.3d file available in FlatPlate directory and run the case. A default 3D airfoil case will run.</div></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Sep 26, 2021 at 2:12 PM Madhav Nagori <<a href="mailto:mnagori@uncc.edu" target="_blank">mnagori@uncc.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">Hello Everyone,<div><br></div><div>I am using the Flash 3D setup for my project. Before implementing the 3D setup to my specific problem, I am trying to run the default cases in FLASH. Once that is done, I will change the files to tailor it to my requirements.</div><div><br></div><div>One of the 3D default cases in FLASH is of the cylinder. There is a simulation block in which a cylinder is placed and the flow over the cylinder is visualized. Since this is a default case, I didn't change any files which I downloaded from FLASH website and ran as it is.</div><div><br></div><div>The simulation starts properly. But after a few time steps, the value of dt_hydro is going to a large negative value. As a result, the simulation blows up. Has anyone faced a similar problem? Any suggestions would be greatly appreciated.</div><div><br></div><div>Thank you for the time.</div><div><br clear="all"><div>Best,</div><div><br></div><div>Madhav</div></div></div><div dir="ltr"><div>-- <br><div dir="ltr"><div dir="ltr"><div style="color:rgb(34,34,34)">Best Regards,</div><div style="color:rgb(34,34,34)"><br></div><div style="color:rgb(34,34,34)">Madhav Nagori (he/him)</div><div style="color:rgb(34,34,34)"><br></div><div style="color:rgb(34,34,34)">PhD Candidate | Laboratory for Multiscale Computational Fluid Dynamics</div><div style="color:rgb(34,34,34)">Department of Mechanical Engineering and Engineering Sciences</div><div style="color:rgb(34,34,34)">University of North Carolina at Charlotte</div><div style="color:rgb(34,34,34)">Office: Duke <a href="https://www.google.com/maps/search/273,+9330+Robert+D.+Snyder+Rd,+Charlotte,+NC+28262,+USA?entry=gmail&source=g" target="_blank">273, 9330 Robert D. Snyder Rd, Charlotte, NC 28262, USA</a></div><div style="color:rgb(34,34,34)">Email: <a href="mailto:mnagori@uncc.edu" target="_blank">mnagori@uncc.edu</a><br></div><div style="color:rgb(34,34,34)">LinkedIn: <a href="http://www.linkedin.com/in/madhav-nagori" target="_blank">www.linkedin.com/in/madhav-nagori</a></div></div></div></div></div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div style="color:rgb(34,34,34)">Best Regards,</div><div style="color:rgb(34,34,34)"><br></div><div style="color:rgb(34,34,34)">Madhav Nagori</div><div style="color:rgb(34,34,34)"><br></div><div style="color:rgb(34,34,34)">PhD Candidate | Laboratory for Multiscale Computational Fluid Dynamics</div><div style="color:rgb(34,34,34)">Department of Mechanical Engineering and Engineering Sciences</div><div style="color:rgb(34,34,34)">University of North Carolina at Charlotte</div><div style="color:rgb(34,34,34)">Office: Duke 273, 9330 Robert D. Snyder Rd, Charlotte, NC 28262, USA</div><div style="color:rgb(34,34,34)">Email: <a href="mailto:mnagori@uncc.edu" target="_blank">mnagori@uncc.edu</a><br></div><div style="color:rgb(34,34,34)">LinkedIn: <a href="http://www.linkedin.com/in/madhav-nagori" target="_blank">www.linkedin.com/in/madhav-nagori</a></div></div></div>
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