i've got an error checking the grid in an axysymetric problem in 2d. the x axis is my revolution axis and i don't understand why i have a zero face area.(using fluent 6.2.16 )

can anybody help me--thanx a lot in advance.JORDI ARMENGOL

Grid Check

Domain Extents:

x-coordinate: min (m) = 0.000000e+000, max (m) = 5.000000e+001

y-coordinate: min (m) = 0.000000e+000, max (m) = 2.000000e+002 ...

WARNING: non-positive face area exist.

minimum face area (m2): 0.000000e+000

maximum face area (m2): 7.691770e+002

that if i check the grid with 2d solver (not axisymetric) i won't give the error -- the grid check is ok

sorry

check BC, skeweness, and also check the box Import 2d mesh while exporting it from Gambit. KP

it's a very simple problem with only two bc. and i have done similar models and i think it is not the problem. i always have the box "import 2d mesh" but i dont know how to check the skewness (i don't know whats skewness) can you give me some notes thanx. JORDI

length to breadth ratio of a single cell should be less than 5:1. This is mantained in order to avoid numerical diffusion. Higher order numerical schemes can also be tried but defaults are best suited for most of the cases.

Check your case. I presume something wrong with BC ... KP

i don't know what to do with BC. i have checked the mesh without the axysymetric solver (with 2d) and the result is ok? what can happenb to my model? thanx again.

axi symmetric models must have the axis of rotation on the cartesian x-axis. I think this may be the problem. hope this helps

Open the Grid/Translate, check if the the Ymin is less than zero. If it is, translte the grid making the Ymin equal to zero.

thanks but the x axis is my rotation axis indeed. i don't know... thanx again

[mohsen zendehbad]

Dear friend, were you finally able to solve this problem? we're facing the same problem now!