# Relevant Section of Enzo Paramter File (NOT COMPLETE!) 
ProblemType                              = 30      // cosmology simulation
TopGridRank                              = 3
TopGridDimensions                        = 512 512 512
SelfGravity                              = 1       // gravity on
TopGridGravityBoundary                   = 0       // Periodic BC for gravity
LeftFaceBoundaryCondition                = 3 3 3   // same for fluid
RightFaceBoundaryCondition               = 3 3 3
RefineBy                                 = 2

#
CosmologySimulationOmegaBaryonNow        = 0.0449
CosmologySimulationOmegaCDMNow           = 0.2211
CosmologySimulationDensityName           = GridDensity
CosmologySimulationVelocity1Name         = GridVelocities_x
CosmologySimulationVelocity2Name         = GridVelocities_y
CosmologySimulationVelocity3Name         = GridVelocities_z
CosmologySimulationCalculatePositions    = 1
CosmologySimulationParticleVelocity1Name = ParticleVelocities_x
CosmologySimulationParticleVelocity2Name = ParticleVelocities_y
CosmologySimulationParticleVelocity3Name = ParticleVelocities_z
CosmologySimulationParticleDisplacement1Name = ParticleDisplacements_x
CosmologySimulationParticleDisplacement2Name = ParticleDisplacements_y
CosmologySimulationParticleDisplacement3Name = ParticleDisplacements_z

#
#  define cosmology parameters
#
ComovingCoordinates                      = 1       // Expansion ON
CosmologyOmegaMatterNow                  = 0.266
CosmologyOmegaLambdaNow                  = 0.734
CosmologyHubbleConstantNow               = 0.71     // in 100 km/s/Mpc
CosmologyComovingBoxSize                 = 28.4    // in Mpc/h
CosmologyMaxExpansionRate                = 0.015   // maximum allowed delta(a)/a
CosmologyInitialRedshift                 = 99      //
CosmologyFinalRedshift                   = 0       //
GravitationalConstant                    = 1       // this must be true for cosmology
#
#
ParallelRootGridIO                       = 1
ParallelParticleIO                       = 1
PartitionNestedGrids                     = 1
CosmologySimulationNumberOfInitialGrids  = 4
CosmologySimulationGridDimension[1]      =              244              244              248
CosmologySimulationGridLeftEdge[1]       =        0.3828125        0.3828125       0.37890625
CosmologySimulationGridRightEdge[1]      =       0.62109375       0.62109375       0.62109375
CosmologySimulationGridLevel[1]          = 1
CosmologySimulationGridDimension[2]      =              420              420              428
CosmologySimulationGridLeftEdge[2]       =        0.3984375        0.3984375       0.39453125
CosmologySimulationGridRightEdge[2]      =      0.603515625      0.603515625      0.603515625
CosmologySimulationGridLevel[2]          = 2
CosmologySimulationGridDimension[3]      =              768              768              784
CosmologySimulationGridLeftEdge[3]       =          0.40625          0.40625       0.40234375
CosmologySimulationGridRightEdge[3]      =          0.59375          0.59375          0.59375
CosmologySimulationGridLevel[3]          = 3
#
# region allowed for further refinement
#
RefineRegionLeftEdge                     =            0.425            0.425      0.421484375
RefineRegionRightEdge                     =            0.575            0.575      0.574609375