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Gyroid BioFilter

Hardware
  • 2 Devlogs
  • 2 Total hours

Surface Area Maximized Biofilter Using Triply Periodic Minimized Surfaces (TPMS)

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1h 46m 1s logged

Final model parameters done - but will it survive in print?

After a week of speedrunning how to use Autodesk Fusion (this was before I joined Stardance) and understanding TPMS shapes, I got down the final parameters that reached over double the target surface area.

A gyroid is described by the following equation:

cos(x)sin(y) + cos(y)sin(z) + cos(z)sin(x) = c,

where at c=0 the gyroid is at the minimum possible surface area. This also describes the relative density of the 3d shape.

After failing to reach the desired surface area using only autodesk fusion, I switched to MSLattice, which is specifically built for modeling TPMS structures, and finally got measurements I was content with: around 14082.717mm^2 for a 20x25mm cylinder filter.

This means 14082.717mm^2 worth of biofilm that can trap contaminants and produce clean air and water.

Will this print with a 0.4mm nozzle? The wall thickness I manually measured to be about 0.8mm so theoretically it’s fine but we’ll see.

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19m 1s logged

Maximum Surface Area Biofilter

Biofilters filter contaminants by using fungi, bacteria, and other micro-organisms that form a biofilm to trap contaminants as the fluid flows through.

This is used in air pollution control, water purification, and more.

So, intuitively, to maximize the contaminants trapped, the water must contact as much of the biofilm as possible——in other words, the filter must maximize surface area.

So my goal is to:

  • create a 3D CAD model of a Biofilter that maximizes surface area for most efficient filtering of fluid
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