add jan 2021 post
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title: "This month in AvaFrame - January 2021 edition"
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date: 2021-01-30T19:08:58+01:00
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draft: false
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slug: "monthlyjan2021"
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---
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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:
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+ 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 *targeted*
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issues, concentrating for now on the dense flow module com1DFAPy.
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* flat plane: a *pile of sand* (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
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* inclined slope: similar to the previous, a *pile of sand* (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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[Savage-Hutter 1993](https://link.springer.com/article/10.1007/BF01176861)
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in which the depth and velocity profiles can be determined in an analytical
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form.
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* (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.
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+ 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.
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+ 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).
|
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+ 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 [glossary](https://docs.avaframe.org/en/latest/glossary.html).
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If this makes you internally scream in agony because we got it all wrong, feel
|
||||
free to contact us!
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||||
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+ 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
|
||||
time steps), and many more.
|
||||
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+ Bringing AvaFrame to the Windows world is also currently high on our
|
||||
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
|
||||
exciting news on this one in the next few weeks.
|
||||
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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!
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Felix
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<section class="container post">
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<article>
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<header>
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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
|
||||
started getting into the nitty-gritty of our dense flow module’s numerical
|
||||
implementation:</p>
|
||||
<ul>
|
||||
<li>
|
||||
<p>To facilitate and improve our development we added new test cases. This time
|
||||
they are more geared towards testing specific numerical issues and more <em>targeted</em>
|
||||
issues, concentrating for now on the dense flow module com1DFAPy.</p>
|
||||
<ul>
|
||||
<li>
|
||||
<p>flat plane: a <em>pile of sand</em> (i.e. particles with coulomb friction)
|
||||
on a flat plane. The pile should or should not move depending on the
|
||||
steepness of the sides of the pile</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>inclined slope: similar to the previous, a <em>pile of sand</em> (coulomb
|
||||
friction again) flowing down an inclined plane. This test enables comparison
|
||||
to a solution described in
|
||||
<a href="https://link.springer.com/article/10.1007/BF01176861">Savage-Hutter 1993</a>
|
||||
in which the depth and velocity profiles can be determined in an analytical
|
||||
form.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(rotated) pyramid: generation routines to produce a, potentially rotated
|
||||
and/or shifted, pyramid with a release area at the top of the pyramid. This
|
||||
allows for checking of rotational symmetry, among others.</p>
|
||||
</li>
|
||||
</ul>
|
||||
</li>
|
||||
<li>
|
||||
<p>We are currently looking at and analysing how to place the initial particles
|
||||
and what effect this has further along the simulation.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>Getting into the numerical development also means the compute times start to
|
||||
play a role. We moved some parts of the code over to Python to improve the
|
||||
computation efficiency of the python dense flow kernel. We are starting to
|
||||
profile our python code (pudb and cProfile for those interested).</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>For general analysing with ana3AIMEC: after some deliberation we decided to
|
||||
move the (arbitrary) starting point of our runout calculation to the top of
|
||||
the main avalanche profile (instead of some point further down the profile).
|
||||
See our definitions for this in the <a href="https://docs.avaframe.org/en/latest/glossary.html">glossary</a>.
|
||||
If this makes you internally scream in agony because we got it all wrong, feel
|
||||
free to contact us!</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>We have a ton of minor changes which however improve usability quite a lot. That means
|
||||
mundane (some might say boring) things like enabling underscores in input names,
|
||||
consistent naming of result variables, extended export capabilities (more
|
||||
time steps), and many more.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>Bringing AvaFrame to the Windows world is also currently high on our
|
||||
priority list. We explored options on the best ways to install and maintain an
|
||||
AvaFrame installation on as many Windows versions as possible. Expect some
|
||||
exciting news on this one in the next few weeks.</p>
|
||||
</li>
|
||||
</ul>
|
||||
<p>As you can see, we are off to a good start this year! As always please contact
|
||||
us with any questions or issues you have!</p>
|
||||
<p>Felix</p>
|
||||
|
||||
</article>
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<br/>
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