Add Moon-forming giant impact example (WIP)

examples/MoonFormingImpact/README.md

+Canonical Moon-Forming Giant Impact
+===================================
+
+A version of the canonical moon-forming giant impact of Theia onto the early
+Earth (Barr, 2016). Both bodies made of Tillotson iron and granite.
+
+
+Code Setup
+----------
+
+In `swiftsim/`:
+
+`$ ./configure --with-hydro=minimal-multi-mat --with-equation-of-state=tillotson \ `
+`   --disable-vec --with-kernel=wendland-C2`
+`$ make`
+
+In `swiftsim/examples/MoonFormingImpact/`:
+
+`$ ./run.sh`
+
+
+To do
+-----
+
+* Get it working!
+* Add analysis code
+* Make initial conditions available

examples/MoonFormingImpact/batch_script.sh

+#!/bin/bash -l
+
+# ==============
+# Batch script for GIHR simulations with HOT
+# ==============
+#BSUB -L /bin/bash
+
+# ============== Number of processors (and one MPI rank per node)
+#BSUB -n 1
+#BSUB -R "span[ptile=1]"
+
+# ============== Job name
+#BSUB -J SWIFT
+
+# ============== Output files
+#BSUB -oo /cosma5/data/dp004/dc-kege1/gihr_data5/swift/outs_and_errs/swift_%J.out
+#BSUB -eo /cosma5/data/dp004/dc-kege1/gihr_data5/swift/outs_and_errs/swift_%J.err
+
+# ============== Queue
+# #BSUB -q bench1
+#BSUB -q cosma
+# #BSUB -q cosma5
+# #BSUB -q cosma5-prince
+
+# ============== Project and user
+# #BSUB -P dp004
+#BSUB -P durham
+#BSUB -u jacob.kegerreis@durham.ac.uk
+#BSUB -N
+
+# ============== Wall clock time limit
+# #BSUB -W 504:00
+#BSUB -W 12:00
+# #BSUB -W 0:30
+
+# ============== Ensure that the right MPI module is loaded -- i.e. the same
+#                module with which the program was compiled.
+module purge
+module load swift
+module load swift/c4/gcc/intelmpi/5.1.3
+
+# ============== Run the program
+../swift -G -s -t 12 ./moon_forming_impact.yml
+# mpirun -np $LSB_DJOB_NUMPROC ../swift_mpi -G -s -t 12 ./moon_forming_impact.yml
+
+
+
+

examples/MoonFormingImpact/moon_forming_impact.yml

+# Define the system of units to use internally.
+InternalUnitSystem:
+#    UnitMass_in_cgs:        1           # Grams
+#    UnitLength_in_cgs:      1           # Centimeters
+#    UnitVelocity_in_cgs:    1           # Centimeters per second
+    UnitMass_in_cgs:        5.9724e27   # Grams
+    UnitLength_in_cgs:      6.371e8     # Centimeters
+    UnitVelocity_in_cgs:    6.371e8     # Centimeters per second
+    UnitCurrent_in_cgs:     1           # Amperes
+    UnitTemp_in_cgs:        1           # Kelvin
+
+# Parameters governing the time integration
+TimeIntegration:
+    time_begin: 0                       # The starting time of the simulation (in internal units).
+    time_end:   100000                  # The end time of the simulation (in internal units).
+    dt_min:     0.01                    # The minimal time-step size of the simulation (in internal units).
+    dt_max:     10                      # The maximal time-step size of the simulation (in internal units).
+
+# Parameters governing the snapshots
+Snapshots:
+                                        # Common part of the name of output files
+    basename:   snapshots/iron_planet_impact
+    time_first: 0                       # Time of the first output (in internal units)
+    delta_time: 500                     # Time difference between consecutive outputs (in internal units)
+
+# Parameters governing the conserved quantities statistics
+Statistics:
+    delta_time: 500                     # Time between statistics output
+
+# Parameters for the hydrodynamics scheme
+SPH:
+    resolution_eta:     1.2348          # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
+    delta_neighbours:   0.1             # The tolerance for the targetted number of neighbours.
+    CFL_condition:      0.2             # Courant-Friedrich-Levy condition for time integration.
+
+# Parameters for the self-gravity scheme
+Gravity:
+    eta:                    0.025       # Constant dimensionless multiplier for time integration.
+    theta:                  0.7         # Opening angle (Multipole acceptance criterion)
+    comoving_softening:     0.0025      # Comoving softening length (in internal units).
+    max_physical_softening: 0.0025      # Physical softening length (in internal units).
+
+# Parameters related to the initial conditions
+InitialConditions:
+#    file_name:  init_cond.hdf5          # The initial conditions file to read
+    file_name:  init_cond_1e5.hdf5          # The initial conditions file to read
+#    file_name:  snapshots/iron_planet_impact_0064.hdf5          # The initial conditions file to read

examples/MoonFormingImpact/run.sh

+#!/bin/bash
+
+# Run SWIFT
+../swift -G -s moon_forming_impact.yml