Meshing issue- Sweepable and unspeepable bodies

violethill · February 1, 2018, 22:54

Hi everyone,

I was hoping that someone could help me with mymesh issue.

I have a somewhat complicated geometry. I am modelling a series of fibers within a cartridge (in other words, a bunch of cylinders in one big cylinder).

I am having issues with meshing since the fibers themselves are sweepable but the area outside of it is not. This is causing the mesh quality to be poor, a mix of tetra (outside of the fibers) and quad (inside of the fibers), leading to high skewness.

Does anyone have an idea of what is the best approach to mesh these different parts so that the formation is smooth and quality is maintained? Thank you in advance!

piu58 · February 2, 2018, 00:44

It may be that you don't need to simulate the flow within the fibres. Consider to handle them as Hagen–Poiseuille tubes.

violethill · February 2, 2018, 01:18

Hi piu58, thank you for the suggestion. The fibers are with a porous medium, so I am simulating flow not only axially through the fibers but also radially through the membrane portion to elucidate the behavior of flow in the collection tube.

February 1, 2018, 22:54	Meshing issue- Sweepable and unspeepable bodies	#1
violethill New Member Violet Join Date: Jun 2016 Posts: 8 Rep Power: 9	Hi everyone, I was hoping that someone could help me with mymesh issue. I have a somewhat complicated geometry. I am modelling a series of fibers within a cartridge (in other words, a bunch of cylinders in one big cylinder). I am having issues with meshing since the fibers themselves are sweepable but the area outside of it is not. This is causing the mesh quality to be poor, a mix of tetra (outside of the fibers) and quad (inside of the fibers), leading to high skewness. Does anyone have an idea of what is the best approach to mesh these different parts so that the formation is smooth and quality is maintained? Thank you in advance!

February 2, 2018, 00:44		#2
piu58 Senior Member Uwe Pilz Join Date: Feb 2017 Location: Leipzig, Germany Posts: 744 Rep Power: 15	It may be that you don't need to simulate the flow within the fibres. Consider to handle them as Hagen–Poiseuille tubes. __________________ Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950)

February 2, 2018, 01:18		#3
violethill New Member Violet Join Date: Jun 2016 Posts: 8 Rep Power: 9	Hi piu58, thank you for the suggestion. The fibers are with a porous medium, so I am simulating flow not only axially through the fibers but also radially through the membrane portion to elucidate the behavior of flow in the collection tube.