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188 lines
6.4 KiB
HTML
188 lines
6.4 KiB
HTML
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This month in AvaFrame - January 2021 edition - AvaFrame
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This month in AvaFrame - January 2021 edition - AvaFrame
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<h1 class="title">This month in AvaFrame - January 2021 edition</h1>
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<h2 class="date">January 30, 2021</h2>
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</header>
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<p>Welcome to the first instalment of our monthly update of 2021. This month we
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started getting into the nitty-gritty of our dense flow module’s numerical
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implementation:</p>
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<ul>
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<li>
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<p>To facilitate and improve our development we added new test cases. This time
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they are more geared towards testing specific numerical issues and more <em>targeted</em>
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issues, concentrating for now on the dense flow module com1DFAPy.</p>
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<ul>
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<li>
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<p>flat plane: a <em>pile of sand</em> (i.e. particles with coulomb friction)
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on a flat plane. The pile should or should not move depending on the
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steepness of the sides of the pile</p>
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</li>
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<li>
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<p>inclined slope: similar to the previous, a <em>pile of sand</em> (coulomb
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friction again) flowing down an inclined plane. This test enables comparison
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to a solution described in
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<a href="https://link.springer.com/article/10.1007/BF01176861">Savage-Hutter 1993</a>
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in which the depth and velocity profiles can be determined in an analytical
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form.</p>
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</li>
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<li>
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<p>(rotated) pyramid: generation routines to produce a, potentially rotated
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and/or shifted, pyramid with a release area at the top of the pyramid. This
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allows for checking of rotational symmetry, among others.</p>
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</li>
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</ul>
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</li>
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<li>
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<p>We are currently looking at and analysing how to place the initial particles
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and what effect this has further along the simulation.</p>
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</li>
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<li>
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<p>Getting into the numerical development also means the compute times start to
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play a role. We moved some parts of the code over to Python to improve the
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computation efficiency of the python dense flow kernel. We are starting to
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profile our python code (pudb and cProfile for those interested).</p>
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</li>
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<li>
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<p>For general analysing with ana3AIMEC: after some deliberation we decided to
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move the (arbitrary) starting point of our runout calculation to the top of
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the main avalanche profile (instead of some point further down the profile).
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See our definitions for this in the <a href="https://docs.avaframe.org/en/latest/glossary.html">glossary</a>.
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If this makes you internally scream in agony because we got it all wrong, feel
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free to contact us!</p>
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</li>
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<li>
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<p>We have a ton of minor changes which however improve usability quite a lot. That means
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mundane (some might say boring) things like enabling underscores in input names,
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consistent naming of result variables, extended export capabilities (more
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time steps), and many more.</p>
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</li>
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<li>
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<p>Bringing AvaFrame to the Windows world is also currently high on our
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priority list. We explored options on the best ways to install and maintain an
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AvaFrame installation on as many Windows versions as possible. Expect some
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exciting news on this one in the next few weeks.</p>
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</li>
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</ul>
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<p>As you can see, we are off to a good start this year! As always please contact
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us with any questions or issues you have!</p>
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<p>Felix</p>
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