List and decide on which processes and features need to be benchmarked for JR/Subduction2D

[yvandinther]

Extend this table and fill it in to make sure all relevant processes and features in Subduction 2D are benchmarked

• Example process | which benchmark | status of benchmark | does it need to be included in CI (if yes, how)

Decide from this list:
1: 2D visco-elastic Rayleigh–Taylor instability (Kaus and Becker, 2007) | ?
2: Falling block benchmark | ?
3: channel flow with a non-Newtonian rheology | no need
4: non-steady-state temperature distribution in a Newtonian channel | no need
5: Couette flow with shear heating | no need
6: advection of sharp temperature fronts | no need
7: channel flow with variable thermal conductivity
8: thermal convection with constant and variable viscosity
9: stress buildup in a visco-elastic Maxwell body | need
10: recovery of the original shape of an elastic slab | need
11: numerical sandbox benchmark | need
12: bouncing ball benchmark | need

• 2D spontaneous subduction with a free surface (Schmeling et al., 2008) | need
• 2D and 3D Stokes flow with variable viscosity (Popov et al., 2014b) | ?
• 3D infinitesimal and finite amplitude folding instability (Kaus and Schmalholz, 2006) | need?
• 2D buoyancy-driven flows for strongly varying viscosity in the horizontal and vertical
  directions (Moresi et al., 1996; Zhong, 1996)

What is done in benchmark and examples already, which eliminates needs for above? Shear bands ...
What is done in GeoParams for 0D Rheology already?

Sequences of sEismic and Aseismic Slip (SEAS) benchmarks from SCEC community for Rate-And-State Friction RSF (https://strike.scec.org/cvws/seas/):

• [] SEAS 2D Slip on a Vertical Fault | In-plane motion does not exist yet at SCEC: follow up Valere, ..., - Chinese dude requesting same (Luca?) |
• [] SEAS 2D Dip Slip | SCEC SEAS BP3  of 2D plane-strain motion with a dipping RSF fault |
• [] SEAS 3D Slip | SCEC SEAS BP7 of fully-dynamic 3D motion on a vertical RSF fault |

If needed: method of manufactured solutions (MMS) (e.g. Roache, 1997; May et al., 2013; Thieulot, 2014)