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Physical setup and data for meshing
- The directory constant contains a physical setup of flow and a definition of mesh geometry.
- Table shows the constant hierarchy.
- trisurface – directory containing input geometry for snappyHexMesh utility.
- g – file containing definition of gravity acceleration .
- kinematicCloudProperties – this file defines:
- solution – particle solution settings
- active – true for particle adding
- coupled – true for the influence of parcels to the continuous phase
- transient – true for transient simulation
- cellValueSourceCorrection – correction of cell values within the Lagrangian time step
- maxCo – maximum particle Courant number
- interpolationSchemes – interpolation schemes for continuous fields
- averagingMethod – dual for dual-mesh Lagrangian averaging procedure – averaging over the cells and dual (tetrahedral) volumes
- integrationSchemes – definition of integration schemes of velocity field U
- sourceTerms – scheme for source therm in momentum equation of continuous phase, relevant if coupled is activated
- constantProperties – density and max fraction of particles
- subModels – particular particle properties definition
- particleForces – particle drag modelling
- ErgunWenYuDrag – drag model which is suitable for all particulate volume fractions up to the closed packed condition
- gravity – acceleration due to the gravity
- injectionModels – method of particle injection (model1 – user name of model defined below)
- type – patchInjection for injection at the patch
- massTotal – total mass to inject
- SOI – start time of injection
- parcelBasisType – parcel basis enumeration
- patchName – name of the patch for particle injection
- duration – overall time of injection
- parcelsPerSecond – number of particle per second
- U0 – entering velocity of particles
- flowRateProfile – distribution of injected particle with respect to the duration, constant 1 means uniform
- sizeDistribution – size of particles constant (fixedValue), or e.g. normal distribution (normal)
- type – type of size distribution
- normalDistribution – definition of normal distribution function by setting expectation, variance, minValue and maxValue
- dispersionModel – no dispersion model is implemented yet
- patchInteractionModel – localInteraction for patch-by-patch interaction specification
- localInteractionCoeffs – patch interaction definition
- type – rebound for simple rebound, e – elasticity coefficient ( “percentage” dissipation in normal direction) , mu – restitution coefficient (dissipation in tangential direction)
- type – escape for outlet patches
- heatTransferModel – none for no heat transfer modelling
- surfaceFilmModel – none for no surfaceFilmModel
- packingModel – implicit model for applying an inter-particle stress to the particles
- implicitCoeffs – implicit model setting
- alphaMin – minimum stable volume fraction
- rhoMin – minimum stable density
- applyGravity – a gravity force can optionally be applied to the particles as part of this model
- type HarrisCrighton – inter-particle stress model of Harris and Crighton as a particleStressModel
- alphaPacked – close pack volume fraction
- pSolid – solid pressure coefficient
- beta – exponent of the volume fraction
- eps – smallest allowable difference from the packed volume fraction
- dampingModel – no model for collision damping time of particle velocity fluctuation
- isotropyModel – stochastic return-to-isotropy model – adding collision term that causes velocity distributions to relax to isotropic Gaussian distributions
- stochasticCoeffs
- type – isotropic model for the time scale over which the velocity field of a dispersed phase tends towards an isotropic distribution
- alphaPacked – close pack volume fraction
- e – coefficient of restitution
- stochasticCollisionModel – no stochastic collision model implemented
- radiation – no radiation model
- particleForces – particle drag modelling
- solution – particle solution settings
- transportProperties – defines kinematic viscosity of Newtonian fluid.
- turbulenceProperties.water – defines type of turbulence modelling.
Table: Physical properties and geometry data
constant | |
trisurface | |
Cyclone-inlet.stl | <#37346#> |
Cyclone-outlet.stl | |
Cyclone-wall.stl | |
g | - gravity acceleration |
kinematicCloudProperties | - particle settings |
transportProperties | - transport properties |
turbulenceProperties.water | - turbulence setup |