1d_fd_simple_shear_transient

transient-state continuum model for granular flows with pore-pressure dynamics
git clone git://src.adamsgaard.dk/1d_fd_simple_shear_transient
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commit 2bf98ea43e81f5e8f16b011ca93caf89accb9720
parent 03c9864eb8e1eb7f7fba6090654205d4d343271d
Author: Anders Damsgaard <anders@adamsgaard.dk>
Date:   Fri, 12 Apr 2019 09:34:35 +0200

Put comparisons in README into table, add descriptive text

Diffstat:
MREADME.md | 59++++++++++++++++-------------------------------------------
1 file changed, 16 insertions(+), 43 deletions(-)

diff --git a/README.md b/README.md @@ -20,49 +20,22 @@ See below for a comparison with the discrete-element method results from model is not tuned rigorously against the DEM, and the correspondence could probably be improved further. -#### Discrete-element model (Damsgaard et al. 2013, fig. 8) - -![damsgaard2013-fig8.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/damsgaard2013-fig8.png) - -#### Continuum model - -![1d_fd_simple_shear.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/1d_fd_simple_shear.png) - +| Discrete-element model | Continuum Model | +| ----------------------- | --------------- | +| Damsgaard et al. 2013 | | +| ![damsgaard2013-fig8.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/damsgaard2013-fig8.png) | ![1d_fd_simple_shear.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/1d_fd_simple_shear.png) | ### Stress and strain rate -#### Continuum model - -Glass beads have *b* = 0.94. - -![1d_fd_simple_shear_rheology.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/1d_fd_simple_shear_rheology.png) - ---- - -#### Kamb 1991, subglacial till from Upstream-B site - -![kamb1991-fig1.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/kamb1991-fig1.png) - -#### Continuum model - -![1d_fd_simple_shear_rheology_kamb.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/1d_fd_simple_shear_rheology_kamb.png) - ---- - -#### Iverson 2010, various subglacial tills - -![iverson2010-fig2a.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/iverson2010-fig2a.png) - -#### Continuum model - -![1d_fd_simple_shear_rheology_iverson.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/1d_fd_simple_shear_rheology_iverson.png) - ---- - -#### Tulaczyk 2006, Whillans Ice Plain - -![tulaczyk2006-fig1.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/tulaczyk2006-fig1.png) - -#### Continuum model - -![1d_fd_simple_shear_rheology_tulaczyk.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/1d_fd_simple_shear_rheology_tulaczyk.png) +The rheology is of Bingham type, where no deformation occurs beneath the Mohr-Coulomb yield limit. Above it, deformation is highly non-linearly viscous. The model has a parameter *b* for rate dependence beyond yield. Glass beads have *b* = 0.94. + +| Subglacial till | Continuum Model | +| --------------------------------------- | --------------- | +| Upstream-B (Kamb 1991) | | +| ![kamb1991-fig1.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/kamb1991-fig1.png) | ![1d_fd_simple_shear_rheology_kamb.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/1d_fd_simple_shear_rheology_kamb.png) | +| --------------------------------------- | --------------- | +| Various subglacial tills (Iverson 2010) | | +| ![iverson2010-fig2a.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/iverson2010-fig2a.png) | ![1d_fd_simple_shear_rheology_iverson.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/1d_fd_simple_shear_rheology_iverson.png) | +| --------------------------------------- | --------------- | +| Whillans Ice Plain (Tulaczyk 2006) | | +| ![tulaczyk2006-fig1.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/tulaczyk2006-fig1.png) | ![1d_fd_simple_shear_rheology_tulaczyk.png](https://gitlab.com/admesg/1d_fd_simple_shear/raw/master/1d_fd_simple_shear_rheology_tulaczyk.png) |