Bugs in the Blender

I have continued to have luck exploring the Fluid simulations in Blender, but this process has not been without its quirks. I recently encountered a strange issue related to Particle Radius settings

Particle Radius

The radius of one liquid particle in grid cells units. This value describes how much area is covered by a particle and thus determines how much area around it can be considered as liquid. A greater radius will let particles cover more area. This will result in more grids cell being tagged as liquid instead of just being empty.

Whenever the simulation appears to leak or gain volume in an undesired, non physically accurate way it is a good idea to adjust this value. That is, when liquid seems to disappear this value needs to be increased. The inverse applies when too much liquid is being produced.

What does this look like in practice? My most recent simulation actually seems to produce fluid as the scene progresses.

Nevertheless, I was able to gain critical insights into this form and will continue to iterate new designs. This is being done in conjunction with paper prototyping. These forms are less sophisticated, but still provide valuable information about how users will experience and interact with this flatware.

Prototyping Cutlery

For one of my final projects this semester, I’m interested in creating a set of eating tools that help account for involuntary muscle movements (e.g., Parkinson's disease or tremors) and other mobility difficulties that limit the enjoyment and consumption of foods; I'm interested in exploring simple solid shapes, living hinges, and assembly forms derived from explicit advantages of additive manufacturing techniques.

[I want to make a really nifty spoon.]

Fabricating physical prototypes will be a challenge (…)

Seriously: fuck you, COVID-19.

This is not the only challenge, however. Finding access to food-safe materials, conducting a series of user tests, iterating forms, and self-directed research will also require creative workarounds to overcome the limitations of working while under “shelter-in-place” orders due to global pandemic.

I have decided to go 100% digital. instead of building various forms and testing their ability to hold fluids under rapid motion, I will instead conduct a series of simulated physics tests to evaluate forms. For the first part of this project, I am required to conduct an A/B test or evaluation. I have decided to conduct dual testing using different 3D programs.

Method 1:

Maxon Cinema 4D includes a variety of physical simulation abilities—including particles and fluid dynamics. I intend to leverage this software’s capacity to test various designs and forms. Tests will be designed to evaluate fluid retention under repeated multi-axial movements. Cutlery designs will be tested against traditional forms (e.g., standard soup spoons).

Method 2:

Blender is a free, open source platform for creating 3D models, rendering, animation, and more. Among the built-in features is a fluid simulator. Combined with rigid body and gravity physics, it should be possible to evaluate a variety of spoon shapes and (potentially) even different forms of cutlery.

Considerations:

By using two different simulations, it should be possible to more thoroughly evaluate a design’s fluid retention abilities.

Timeline:

Week 1 — Cinema 4D Workflow: Since I am already familiar with Cinema 4D, I have decided to begin this project by constructing my first simulation with this software. I will use Fusion 360 to generate original spoon designs, as well as a “traditional” spoon shape to compare performance.

Week 2 — Blender Workflow: Using the assets from week 1, I will spend week 2 developing and executing a comparable test running under Blender’s fluid simulation engine.

Resources:

Blender Tutorial - Realistic Fluid Simulation: https://www.youtube.com/watch?v=zmw-BTCbWMw

Cinema 4D Tutorial - Water simulation Animation: https://www.youtube.com/watch?v=JehbYBAZw7c

What does Day 1 look like?

Let’s just say I have a lot to learn.