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- Relevant Section of Enzo Paramter File (NOT COMPLETE!)
- ProblemType = 30 // cosmology simulation
- TopGridRank = 3
- TopGridDimensions = 128 128 128
- SelfGravity = 1 // gravity on
- TopGridGravityBoundary = 0 // Periodic BC for gravity
- LeftFaceBoundaryCondition = 3 3 3 // same for fluid
- RightFaceBoundaryCondition = 3 3 3
- RefineBy = 2
- #
- CosmologySimulationOmegaBaryonNow = 0.0486
- CosmologySimulationOmegaCDMNow = 0.2603
- 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 = 0.3089
- CosmologyOmegaLambdaNow = 0.6911
- CosmologyHubbleConstantNow = 0.6774 // in 100 km/s/Mpc
- CosmologyComovingBoxSize = 0.2 // in Mpc/h
- CosmologyMaxExpansionRate = 0.015 // maximum allowed delta(a)/a
- CosmologyInitialRedshift = 200 //
- CosmologyFinalRedshift = 15 //
- GravitationalConstant = 1 // this must be true for cosmology
- #
- #
- ParallelRootGridIO = 1
- ParallelParticleIO = 1
- PartitionNestedGrids = 1
- CosmologySimulationNumberOfInitialGrids = 3
- CosmologySimulationGridDimension[1] = 74 74 74
- CosmologySimulationGridLeftEdge[1] = 0.359375 0.359375 0.359375
- CosmologySimulationGridRightEdge[1] = 0.6484375 0.6484375 0.6484375
- CosmologySimulationGridLevel[1] = 1
- CosmologySimulationGridDimension[2] = 112 112 112
- CosmologySimulationGridLeftEdge[2] = 0.390625 0.390625 0.390625
- CosmologySimulationGridRightEdge[2] = 0.609375 0.609375 0.609375
- CosmologySimulationGridLevel[2] = 2
- #
- # region allowed for further refinement
- #
- RefineRegionLeftEdge = 0.4125 0.4125 0.4125
- RefineRegionRightEdge = 0.5875 0.5875 0.5875
- dtDataDump = 0.4 // dump at beginning and end
- DataDumpName = output_
- CosmologyOutputRedshift[0] = 20.0
- CosmologyOutputRedshift[1] = 19.0
- CosmologyOutputRedshift[2] = 18.0
- #
- # set hydro parameters
- #
- Gamma = 1.6667
- PPMDiffusionParameter = 0 // diffusion off
- DualEnergyFormalism = 1 // use total & internal energy
- InterpolationMethod = 1 // SecondOrderA
- CourantSafetyNumber = 0.4
- ParticleCourantSafetyNumber = 0.4
- RadiativeCooling = 1
- MultiSpecies = 2
- #use_grackle = 1
- #MetalCooling = 1
- #
- # set grid refinement parameters
- #
- StaticHierarchy = 0 // AMR turned on!
- # ** These two set the level of refinement **
- MaximumRefinementLevel = 8
- MaximumGravityRefinementLevel = 8
- RefineBy = 2
- CellFlaggingMethod = 2 4 6
- MinimumEfficiency = 0.4
- NumberOfBufferZones = 1
- #MinimumOverDensityForRefinement = 5.0 5.0
- #MinimumPressureJumpForRefinement = 10000.
- RefineByJeansLengthSafetyFactor = 16
- #
- # set some global parameters
- #
- GreensFunctionMaxNumber = 100 // # of greens function at any one time
- UseMinimumPressureSupport = 1
- StarParticleCreation = 8
- StarParticleFeedback = 8
- PopIIIStarMass = 40
- #PopIIIBlackHoles = 1
- #PopIIIInitialMassFunction = 1
- #PopIIIInitialMassFunctionSeed = 288762
- RadiativeTransfer = 1
- RadiativeTransferRadiationPressure = 1
- RadiativeTransferOpticallyThinH2 = 1
- RadiativeTransferHIIRestrictedTimestep = 1
- RadiativeTransferAdaptiveTimestep = 1
- RadiativeTransferLoadBalance = 1
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