Voronoi

This test problem illustrates the use of the phase field method when initialized with a Voronoi tesselation. This example tests the following capabilities

The following is the result in 2D; the problem can be run in 3D as well.

Notice that there are 100 initial grains in the tesselation, but only 10 actual grains in the simulation. Therefore, some grains will eventually merge together when the boundary between them disappears.

2D-100grain-parallel

	Two-dimensional
	Parallel (4 procs)
	Validated using check script
	16.04s (beaker) 11.58s (statler) 9.32s (waldorf)
	mpiexec -np 4 ./bin/alamo-2d-g++ tests/Voronoi/input

2D-100grain-serial

	Two-dimensional
	Serial
	Validated using check script
	50.84s (beaker) 37.94s (statler) 60.03s (github) 26.9s (waldorf)
	./bin/alamo-2d-g++ tests/Voronoi/input

2D-20grain-serial-coverage

	Two-dimensional
	Serial
	Not validated
	./bin/alamo-2d-g++ tests/Voronoi/input stop_time="0.01" ic.voronoi.number_of_grains="20"

Input file (../../tests/Voronoi/input)

#@ 
#@ [2D-100grain-parallel]
#@ nprocs = 4
#@ dim = 2
#@ benchmark-beaker = 16.04
#@ benchmark-statler = 11.58
#@ benchmark-waldorf = 9.32
#@ 
#@ [2D-100grain-serial]
#@ nprocs = 1
#@ dim = 2
#@ benchmark-beaker = 50.84
#@ benchmark-statler = 37.94
#@ benchmark-github = 60.03
#@ benchmark-waldorf = 26.9
#@
#@ [2D-20grain-serial-coverage]
#@ nprocs   = 1
#@ dim      = 2
#@ coverage = true
#@ check    = false
#@ args     = stop_time=0.01
#@ args     = ic.voronoi.number_of_grains=20
#@

alamo.program               = microstructure
plot_file		    = tests/Voronoi/output

timestep		    = 0.005
stop_time		    = 1

amr.plot_dt		    = 0.1

amr.max_level		    = 3
amr.n_cell		    = 32 32 32
amr.blocking_factor	    = 4
amr.regrid_int		    = 10
amr.grid_eff		    = 1.0

ic.type			    = voronoi
ic.voronoi.number_of_grains = 100
#ic.voronoi.number_of_grains = 100
#ic.type			    = constant
#ic.value = 1 0 0 0 0 0 0 0 0 0
geometry.prob_lo	    = 0 0 0
geometry.prob_hi	    = 5 5 5
geometry.is_periodic	    = 1 1 1

bc.eta.type = constant
bc.eta.constant.type.xhi			= periodic
bc.eta.constant.type.xlo			= periodic
bc.eta.constant.type.yhi			= periodic
bc.eta.constant.type.ylo			= periodic
bc.eta.constant.type.zhi			= periodic
bc.eta.constant.type.zlo			= periodic

pf.number_of_grains	    = 10
pf.M			    = 1.0 
pf.mu			    = 10.0
pf.gamma		    = 1.0
pf.l_gb			    = 0.05
pf.sigma0		    = 0.075