3D natural convection

[zongzilin]

Hi neks,

I am currently porting a 3D natural convection case from nek5000 into nekRS. The case is running fine in nek5000 and also compiling fine in nekRS using nrspre. Upon launching the case using nrsmpi, nekRS aborted and shows the err message

loading mesh from nek ... NboundaryIDs: 1, NboundaryFaces: 450 done (0.000234434s)
generating mesh ... Nq: 8 cubNq: 11
computing geometric factors ... J [3.7037e-05,3.7037e-05] done (0.129843s)
loading gs kernels ... done (0.099077s)
timing oogs modes: 0.00069271s 0.000609654s 0.000870059s 0.000870654s used mode: 1.1
min NinternalElements: 272 (ratio: 0.48)
loading udf kernels ... done
timing oogs modes: 0.00823705s 0.0080566s 0.00787852s 0.00787747s used mode: 2.1
multiplicity test err=752727!

For .udf file, I have left contents of userf, and uservp blank since my problem does not apply a variable properties and user defined function. I have tried commenting out other function on .udf files too but it doesn't seem to help. And what does the file .oudf do? I am currently leaving it blank and it does not look like the source of this error. Is there any potential area that I can debug for error?

And I also notice that nekRS is not able to run 2D cases. When will 2D case be supported?

P.S when will the docs for nekRS be available?

Thanks