tadd seaicemuri post - adamsgaard.dk - my academic webpage | |
git clone git://src.adamsgaard.dk/adamsgaard.dk | |
Log | |
Files | |
Refs | |
README | |
LICENSE | |
--- | |
commit 87d11309e2cbb1f1442ad5bdc137f78d0e4a816e | |
parent 926cf1de1f3dba28c26745ecf76bbda256567cc6 | |
Author: Anders Damsgaard <[email protected]> | |
Date: Mon, 24 May 2021 20:51:12 +0200 | |
add seaicemuri post | |
Diffstat: | |
A pages/009-seaicemuri.cfg | 7 +++++++ | |
A pages/009-seaicemuri.html | 49 +++++++++++++++++++++++++++++… | |
A pages/009-seaicemuri.txt | 42 +++++++++++++++++++++++++++++… | |
3 files changed, 98 insertions(+), 0 deletions(-) | |
--- | |
diff --git a/pages/009-seaicemuri.cfg b/pages/009-seaicemuri.cfg | |
t@@ -0,0 +1,7 @@ | |
+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 | |
diff --git a/pages/009-seaicemuri.html b/pages/009-seaicemuri.html | |
t@@ -0,0 +1,49 @@ | |
+<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> | |
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 |