OpenFOAM-12

Files

Henry Weller 19b3a5c385 Sub-models, fvOptions: Removed 'active' switch

It is better to not select and instantiate a model, fvOption etc. than to create
it and set it inactive as the creation process requires reading of settings,
parameters, fields etc. with all the associated specification and storage
without being used.  Also the incomplete implementation added a lot of
complexity in the low-level operation of models introducing a significant
maintenance overhead and development overhead for new models.

2020-12-01 18:50:20 +00:00

Rationalized dictionary and configuration file headers

2018-07-09 15:40:05 +01:00

constant

Sub-models, fvOptions: Removed 'active' switch

2020-12-01 18:50:20 +00:00

system

etc/templates: Added Phi to fvSolution for potentialFoam

2020-11-27 11:53:40 +00:00

README

template cases: Updated to use surfaceFeatures rather than

2018-05-30 12:36:21 +01:00

README

Overview
========
+ Template case for rotating geometry flow for a closed geometry
+ Can be used for MRF or AMI simulations
+ Setup to run the simpleFoam solver for MRF, pimpleDyMFoam for AMI
+ The case is designed to be meshed with snappyHexMesh
+ snappyHexMesh is setup to use 3 trisurface files
  + fixed.obj: CAD of the stationary geometry
  + rotating.obj: CAD of the rotating geometry
  + rotatingZone.obj: CAD of surface bounding the rotating region
+ Copy the *.obj files to the constant/triSurface directory
+ The fixed.obj should contain an inlet and outlet region to create the relevant
  patches in the mesh

Background Mesh
===============
+ The blockMeshDict file contains a configuration for a cylindrical background
  mesh aligned along the z-axis
+ The mesh includes a core box-shaped block and inner and outer cylinders
+ The backgroundMesh subdictionary includes key geometric parameters of the mesh
+ The inner cylinder relates to the rotatingZone.obj
+ The outer cyliner relates to the external boundary, e.g. fixed.obj
+ Set the radii of inner and outer cylinders to ~2% larger than respective OBJ
  files
+ Set background mesh density with boxCells, inCells, outCells and zCells
+ Run blockMesh
+ NOTE: An alternative blockMeshDict-box file exists if the user wants a regular
  box-shaped background mesh, similar to set up in the inflowOutflow template

Features
========
+ Run surfaceFeatures to extract features for explicit feature capturing

Castellated Mesh
================
+ run snappyHexMesh to obtain a castellatedMesh
+ Review the mesh; modify refinement levels and regenerate the mesh as required
  (levels are set in refinementSurfaces and refinementRegions)

Snapped Mesh
============
+ In snappyHexMeshDict, set castellatedMesh off; snap on;
+ Run the snapping phase of snappyHexMesh
+ Review the mesh

Layers
======
+ To add layers to the mesh along wall boundary patches...
+ Switch on addLayers; switch snap off;
+ Run snappyHexMesh
+ The number of layers can be changed by modifying nSurfaceLayers

Initialisation
==============
+ Initialise the field files in the 0 directory
+ Set the viscosity in constant/transportProperties
+ Rotating properties are set in constant/rotatingZoneProperties
  + For MRF, this file is included from system/fvOptions
  + For AMI, this file is included from constant/dynamicMeshDict
+ Ensure settings are appropriate in controlDict, fvSchemes, fvSolution, for
  relevant simulation; for AMI, in particular, ensure that deltaT, ddtSchemes
  and relaxationFactors are set for transient simulation