[Other] Mixed mesh nonothogonalcorr and the convergence

sven82 · December 10, 2008, 09:59

Hi everybody,

I create a mesh in ansa with prisms and tetraheda.
my question now, how set and interpret I the nNonorthogonalcorr ? how much is to set ?
how to interpret the residual of p.residual5, is this a convergens criterion,of p ? And how is the convergence of U when I set many nNonorth., the convergence of U is than a lot slower than convergence of p.redidual5?

much HOWs , too much !
Im really thankful for every post,
Thanks a lot

Thats the part of the log, nNonortogonal 4, relTol 0.001 tolernce 10^-6 steadystate:

DICPCG: Solving for p, Initial residual = 1, Final residual = 0.000964752, No Iterations 41
DICPCG: Solving for p, Initial residual = 0.107244, Final residual = 0.000107028, No Iterations 117
DICPCG: Solving for p, Initial residual = 0.0217492, Final residual = 2.09976e-05, No Iterations 276
DICPCG: Solving for p, Initial residual = 0.00645185, Final residual = 6.32917e-06, No Iterations 232
DICPCG: Solving for p, Initial residual = 0.00203466, Final residual = 2.03374e-06, No Iterations 528

p almost convergence with 2.03e-6 , thats the first Iteration step ( deltsT 1 ) ??

checkMesh:

Mesh stats
points: 210406
faces: 1550050
internal faces: 1440066
cells: 697760
boundary patches: 3
point zones: 0
face zones: 0
cell zones: 0

Number of cells of each type:
hexahedra: 0
prisms: 189689
wedges: 0
pyramids: 9387
tet wedges: 0
tetrahedra: 498684
polyhedra: 0

Checking topology...
Boundary definition OK.
Point usage OK.
Upper triangular ordering OK.
Face vertices OK.
Number of regions: 1 (OK).

Checking patch topology for multiply connected surfaces ...
Patch Faces Points Surface topology
_NEU_cfd-modell_20080812.igs108900 54402 ok (non-closed singly connected)
outlet 140 85 ok (non-closed singly connected)
inlet 944 509 ok (non-closed singly connected)

Checking geometry...
Overall domain bounding box (-0.09925 -0.153524 -0.109521) (0.3935 0.0587016 0.08064)
Mesh (non-empty) directions (1 1 1)
Mesh (non-empty, non-wedge) dimensions 3
Boundary openness (-2.23911e-21 -1.07477e-19 -2.03969e-19) OK.
Max cell openness = 2.67825e-16 OK.
Max aspect ratio = 31.9831 OK.
Minumum face area = 6.04772e-10. Maximum face area = 1.28418e-05. Face area magnitudes OK.
Min volume = 8.21905e-15. Max volume = 1.05877e-08. Total volume = 0.00165722. Cell volumes OK.
Mesh non-orthogonality Max: 85.7172 average: 19.8501
*Number of severely non-orthogonal faces: 1800.
Non-orthogonality check OK.
<<Writing 1800 non-orthogonal faces to set nonOrthoFaces
Face pyramids OK.
Max skewness = 2.44847 OK.

Mesh OK.

December 10, 2008, 09:59	Mixed mesh nonothogonalcorr and the convergence	#1
sven82 Member Sven Degner Join Date: Mar 2009 Location: Zürich Posts: 55 Rep Power: 17	Hi everybody, I create a mesh in ansa with prisms and tetraheda. my question now, how set and interpret I the nNonorthogonalcorr ? how much is to set ? how to interpret the residual of p.residual5, is this a convergens criterion,of p ? And how is the convergence of U when I set many nNonorth., the convergence of U is than a lot slower than convergence of p.redidual5? much HOWs , too much ! Im really thankful for every post, Thanks a lot Thats the part of the log, nNonortogonal 4, relTol 0.001 tolernce 10^-6 steadystate: DICPCG: Solving for p, Initial residual = 1, Final residual = 0.000964752, No Iterations 41 DICPCG: Solving for p, Initial residual = 0.107244, Final residual = 0.000107028, No Iterations 117 DICPCG: Solving for p, Initial residual = 0.0217492, Final residual = 2.09976e-05, No Iterations 276 DICPCG: Solving for p, Initial residual = 0.00645185, Final residual = 6.32917e-06, No Iterations 232 DICPCG: Solving for p, Initial residual = 0.00203466, Final residual = 2.03374e-06, No Iterations 528 p almost convergence with 2.03e-6 , thats the first Iteration step ( deltsT 1 ) ?? checkMesh: Mesh stats points: 210406 faces: 1550050 internal faces: 1440066 cells: 697760 boundary patches: 3 point zones: 0 face zones: 0 cell zones: 0 Number of cells of each type: hexahedra: 0 prisms: 189689 wedges: 0 pyramids: 9387 tet wedges: 0 tetrahedra: 498684 polyhedra: 0 Checking topology... Boundary definition OK. Point usage OK. Upper triangular ordering OK. Face vertices OK. Number of regions: 1 (OK). Checking patch topology for multiply connected surfaces ... Patch Faces Points Surface topology _NEU_cfd-modell_20080812.igs108900 54402 ok (non-closed singly connected) outlet 140 85 ok (non-closed singly connected) inlet 944 509 ok (non-closed singly connected) Checking geometry... Overall domain bounding box (-0.09925 -0.153524 -0.109521) (0.3935 0.0587016 0.08064) Mesh (non-empty) directions (1 1 1) Mesh (non-empty, non-wedge) dimensions 3 Boundary openness (-2.23911e-21 -1.07477e-19 -2.03969e-19) OK. Max cell openness = 2.67825e-16 OK. Max aspect ratio = 31.9831 OK. Minumum face area = 6.04772e-10. Maximum face area = 1.28418e-05. Face area magnitudes OK. Min volume = 8.21905e-15. Max volume = 1.05877e-08. Total volume = 0.00165722. Cell volumes OK. Mesh non-orthogonality Max: 85.7172 average: 19.8501 *Number of severely non-orthogonal faces: 1800. Non-orthogonality check OK. <<Writing 1800 non-orthogonal faces to set nonOrthoFaces Face pyramids OK. Max skewness = 2.44847 OK. Mesh OK.