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Hi Akash,
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<div>The Flash code is tuned for compressible flow: it solves the transport equations with a Godunov shock capturing method. However, it is a low-order method (second or third order as chosen), which will not give particularly good accuracy.</div>
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<div>Incompressible turbulent flow problems are therefore usually solved with either high-order or spectral methods that do not work well in the presence of shocks, but are much more accurate for smooth flows. </div>
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<div>Best,</div>
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<div>Mordecai<br>
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<div>On Feb 4, 2024, at 7:08 AM, flash-users-request@flash.rochester.edu wrote:</div>
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On Jan 30, 2024, at 5:13?PM, Akash Rodhiya <ar8303@nyu.edu> wrote:<br>
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Hello everyone,<br>
<br>
I am planning to use Flash for the Homogenoues Isotropic Turbulence. In<br>
the Hydrodynamic test problems under *The Supplied Test Problems, *I saw<br>
section 34.1.9: Driven Turbulence "StirTurb" in the Flash user guide.<br>
<br>
I thought of using it, but I doubt whether it solves Navier-Stokes with<br>
diffusion term. Because in chapter 14: Hydrodynamics units, the<br>
guide mentions that "The Hydro unit solves Euler's equations for<br>
compressible gas dynamics...".<br>
<br>
Has anyone used Flash for incompressible pure hydrodynamic problems? Can<br>
flash be used for the Homogenous Isotropic turbulence problem? Please let<br>
me know if I can provide additional information for the issue mentioned.<br>
<br>
Thanks and regards,<br>
Akash Rodhiya<br>
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<div>--<br>
Mordecai-Mark Mac Low (he/him) <span class="Apple-tab-span" style="white-space: pre;">
</span>Curator-in-Charge & Professor<br>
+1-212-496-3443 <span class="Apple-tab-span" style="white-space: pre;"> </span>
Department of Astrophysics<br>
+1-212-769-5007 (fax) <span class="Apple-tab-span" style="white-space: pre;"> </span>
American Museum of Natural History<br>
<span class="Apple-tab-span" style="white-space: pre;"></span> <span class="Apple-tab-span" style="white-space: pre;">
</span> 200 Central Park W, NY, NY, 10024-5102, USA</div>
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