10/30/2014

ICEM CFD Introductory Course-Mesh Preparation and Output to Solver


Usage of Edit Mesh tools
•To diagnose and fix any problems and improve mesh quality
•To convert element types
•Refine and/or coarsen mesh
•Manual and automatic tools

•For imported as well as internally created mesh
•To diagnose mesh associativity problems
–Errors – most likely to cause problems in:
•Solver translation
•Solver input
•Solution convergence/run
–Possible Problems – “Unclean surface mesh”
•Unwanted elements
•Unwanted holes/gaps
•May result in incorrect solution 
–Can check any combination of errors/possible problems at any one time
•Individually select
•Click on Error or Possible Problems tabs will select all options in column – selecting again will de-select all
•Set Defaults will select most commonly seen/detrimental diagnostics
–Check Mode
•Create Subsets – creates a subset of elements that fit each criteria
Check/Fix Each – offers automatic fixing of indicated problem
•Duplicate Elements
–Elements that share all nodes with other elements of the same type
•Uncovered Faces
–Volumetric element faces that are neither attached to the face of another volumetric element nor to a surface element (boundary face)
•Missing Internal Faces
–Volumetric elements that are adjacent to another of a different part with no surface element between them
•Periodic Problems
–Inconsistency in the number of nodes/faces between periodic sides
–Special check for rotating (sector) or translational periodic grids

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