| aunmhd |
August 9, 2020 05:49 |
Fluent Mesh Check Fail
1 Attachment(s)
Hey Fluent Community,
I have a certain mesh-check failure which I believe might be responsible for the erroneous results my simulations are giving. I will not get into the details of the simulation in this thread.
I have prepared the mesh in ICEM CFD. The mesh is hexahedral. It has three fluid domains (blocks have been assigned to respective parts).
Two Domains (greem and orange) are rotary one (gray) is a stationary domain.
Mesh Quality in ICEM is around 0.25 Min Angle is around 18. [Not the best, but I read that most solvers accept these].
The Pre-Mesh was converted to an Unstructured Mesh.
Before output to Fluent, the mesh has been split with 'internal walls' [to create interfaces in Fluent between rotary-stationary and rotary-rotary domains].
I am using Fluent 14.0.
Can anyone suggest what is wrong here and what I can do to correct this?
Mesh Check gives the following message in the TUI window:
Quote:
Mesh Check Verbosity (0 - 2) [0] 2
>
Domain Extents:
x-coordinate: min (m) = -1.000000e+01, max (m) = 5.000000e+00
y-coordinate: min (m) = -8.000000e+00, max (m) = 8.000000e+00
z-coordinate: min (m) = -8.000000e+00, max (m) = 8.000000e+00
Volume statistics:
minimum volume (m3): 1.631945e-08
maximum volume (m3): 1.130851e-02
total volume (m3): 3.838335e+03
Face area statistics:
minimum face area (m2): 8.495120e-07
maximum face area (m2): 1.006442e-01
Checking number of nodes per cell.
Checking number of faces per cell.
Checking thread pointers.
Checking number of cells per face.
Checking face cells.
Checking cell connectivity.
Checking bridge faces.
Checking right-handed cells.
Checking face handedness.
Checking face node order.
Checking closed cells.
Checking contact points.
Checking element type consistency.
Checking boundary types.
Checking face pairs.
Checking wall distance.
Checking node count.
Checking nosolve cell count.
Checking nosolve face count.
Checking face children.
Checking cell children.
Checking parent-child pointers (cell).
Checking parent-child pointers (face).
WARNING: Unassigned interface zone detected for interface 95
WARNING: Unassigned interface zone detected for interface 96
WARNING: Unassigned interface zone detected for interface 101
Checking thread consistency across compute nodes.
Checking thread layer counts.
Checking neighbor counts.
Checking exterior faces.
Checking interface faces.
Checking interface nodes.
Checking face ids.
Checking node ids.
Checking corner nodes.
Checking interior cell pointers.
Checking exterior cell pointers.
Checking storage.
Done.
WARNING: Mesh check failed.
Mesh Quality:
Orthogonal Quality ranges from 0 to 1, where values close to 0 correspond to low quality.
Minimum Orthogonal Quality = 3.07980e-01 (cell 111574 on zone 84)
Cell Squish ranges from 0 to 1, where values close to 1 correspond to low quality.
Maximum Cell Squish Index = 6.92020e-01 (cell 111574 on zone 84)
Maximum Aspect Ratio = 6.98323e+01 (cell 59089 on zone 85)
Minimum Expansion Ratio = 5.05230e-02 (cell 93842 on zone 84)
|
|
