Error when create mesh on a ellipsoid

Hello all,
I am new to cubit and I am trying to create mesh on ellipsoid:

sphere radius 1
volume 1 scale x 0.5 y 0.5 z 0.05
mesh vol 1

but I got the error:

Volume 1 must have its meshing scheme explicitly specified;
it is not automatically mappable, submappable or sweepable.
Nothing to match.
ERROR: 1 volume did not mesh : Volume 1
Although some entities failed to mesh, Cubit will log the command in the journal file anyway, for future use.
Finished Command: mesh volume 1

Can you tell me how to solve it?
Thanks a lot!
Best,
Bowen

Besides, I want to create mesh inside the ellipsoid.

Hello,
normally a sphere can be meshed with choosing the sphere scheme.

reset
sphere radius 1
volume 1 scheme sphere
mesh vol 1

image

as you’ve scaled the sphere to a ellipsiod, cubit will tell you that it can not set the scheme to sphere, as it is not a sphere anymore. so now the volume is not automatically meshed with hexes.

basically we want volumes where we could use the map and sweep scheme. to achieve this we can use webcuts to break down the volume into smaller volumes that we can mesh.

reset
sphere radius 1
volume 1 scale x 0.5 y 0.5 z 0.05
webcut volume 1 with cylinder radius 0.45 axis z 
webcut volume all with plane xplane offset 0
webcut volume all with plane yplane offset 0

image

we can now imprint/merge the volumes and mesh them.

imprint vol all
merge vol all
mesh vol all

image

When you are totally new to Cubit you can do some of the
tutorial and training content that’s available. This will help you a lot to get a feeling for meshing with cubit.

Dear Norbert Hofbauer,

It works! Thank you very much!