tadd seaicemuri post - adamsgaard.dk - my academic webpage
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(DIR) commit 87d11309e2cbb1f1442ad5bdc137f78d0e4a816e
(DIR) parent 926cf1de1f3dba28c26745ecf76bbda256567cc6
(HTM) Author: Anders Damsgaard <anders@adamsgaard.dk>
Date: Mon, 24 May 2021 20:51:12 +0200
add seaicemuri post
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A pages/009-seaicemuri.cfg | 7 +++++++
A pages/009-seaicemuri.html | 49 +++++++++++++++++++++++++++++++
A pages/009-seaicemuri.txt | 42 +++++++++++++++++++++++++++++++
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(DIR) diff --git a/pages/009-seaicemuri.cfg b/pages/009-seaicemuri.cfg
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+filename=seaicemuri.html
+title=Sea ice talk: Floe-scale ridging in discrete element models for sea ice
+description=Recorded talk for workshop on granular modeling of sea ice
+id=seaicemuri
+tags=science, sea ice
+created=2021-05-22
+updated=2021-05-22
(DIR) diff --git a/pages/009-seaicemuri.html b/pages/009-seaicemuri.html
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+<p> Below is my recorded talk for an upcoming workshop on <a
+href="https://seaicemuri.org">modeling the granular nature of sea ice</a>.
+The workshop is online, and will take place in the week of June 7th,
+2021. Full abstract:</p>
+
+<blockquote>
+<b>Floe-scale ridging in discrete element models for sea ice</b>
+<br><br>
+Anders Damsgaard(1,2), Olga V. Sergienko(1), Alistair Adcroft(1)
+<br><br>
+1: Program in Atmospheric and Oceanic Sciences, Princeton University,
+New Jersey, USA
+<br>
+2: Department of Geoscience, Aarhus University, Aarhus, Denmark
+<br><br>
+Ridging and rafting through compression and shear increase the
+thickness and therefore also the melt resilience of sea-ice packs.
+Present formulations for these mechanisms assume that ice strength
+is solely governed by ice thickness, and generally treat the ice
+pack as a continuum where each cell in the spatial discretization
+includes many individual ice floes. Particle-based sea ice models
+with granular interactions generally represent the ice on a
+floe-by-floe basis, meaning that new formulations are required for
+including ridging. We show through small-scale, high-resolution
+Discrete Element Method simulations that floe-floe compression
+encompasses different deformational modes, where elasticity transitions
+to frictional sliding and resultant strain weakening at the onset
+of ridging. We present a generalized formulation based on elasticity
+and Coulomb friction which is suitable for simulating the contact
+mechanics of ridging in particle-based sea ice models. On a larger
+scale, this results in ice-pack dynamics prone to stick-slip, strain
+localization, and limited compressional resistance.</blockquote>
+
+<p>Slides and video:</p>
+
+<ul>
+<li><a href="npub/seaicemuri2021-damsgaard.pdf">slides (pdf)</a></li>
+</ul>
+
+<center>
+ <video poster="video/seaicemuri_damsgaard.jpg"
+ controls preload="none" class="mediaframe">
+ <source src="video/seaicemuri_damsgaard.mp4" type="video/mp4">
+ <a href="video/seaicemuri_damsgaard.mp4">Link</a>
+ </video>
+</center>
+
+<p>Several <a href="https://seaicemuri.org/presentations.html">other
+presentations</a> to the workshop are also already available.</p>
(DIR) diff --git a/pages/009-seaicemuri.txt b/pages/009-seaicemuri.txt
t@@ -0,0 +1,42 @@
+Below is my recorded talk for an upcoming workshop on modeling the
+granular nature of sea ice[1] The workshop is online, and will take
+place in the week of June 7th, 2021. Full abstract:
+
+ Title: Floe-scale ridging in discrete element models for sea ice
+
+ Anders Damsgaard(1,2), Olga V. Sergienko(1), Alistair Adcroft(1)
+
+ 1: Program in Atmospheric and Oceanic Sciences, Princeton University,
+ New Jersey, USA
+
+ 2: Department of Geoscience, Aarhus University, Aarhus, Denmark
+
+ Ridging and rafting through compression and shear increase the
+ thickness and therefore also the melt resilience of sea-ice packs.
+ Present formulations for these mechanisms assume that ice strength is
+ solely governed by ice thickness, and generally treat the ice pack as
+ a continuum where each cell in the spatial discretization includes
+ many individual ice floes. Particle-based sea ice models with
+ granular interactions generally represent the ice on a floe-by-floe
+ basis, meaning that new formulations are required for including
+ ridging. We show through small-scale, high-resolution Discrete
+ Element Method simulations that floe-floe compression encompasses
+ different deformational modes, where elasticity transitions to
+ frictional sliding and resultant strain weakening at the onset of
+ ridging. We present a generalized formulation based on elasticity
+ and Coulomb friction which is suitable for simulating the contact
+ mechanics of ridging in particle-based sea ice models. On a larger
+ scale, this results in ice-pack dynamics prone to stick-slip, strain
+ localization, and limited compressional resistance.
+
+Slides and video:
+
+ - slides: gopher://adamsgaard.dk/9/npub/seaicemuri2021-damsgaard.pdf
+ - video: https://adamsgaard.dk/video/seaicemuri_damsgaard.mp4
+
+Several other presentations to the workshop are also already available[2].
+
+
+References:
+[1] https://seaicemuri.org
+[2] https://seaicemuri.org/presentations.html