# Closed system
## MicroSim spec
- **Recommended sim type:** vector field
- **Microsimmability score:** 67/100
- **Layout:** arrow grid (vector field) on the canvas with drifting tracers; sliders below.
### Parameters (tunable controls)
- `Field strength`
- `Source position`
- `Grid resolution`
### What animates
Arrows show the field at each grid point and test particles drift along the flow as the field parameters change.
### Learning objective
Relate field sources and strength to the resulting flow pattern.
## Links (Wikipedia order)
<!-- injected from _registry/childlinks/Closed_system.json (2026-07-30T02:09:12Z) -->
`Chemical_equilibrium` · [[Chemistry]] · `Classical_mechanics` · `Dirk_ter_Haar` · [[Dynamical_system]] · `Edward_A._Guggenheim` · [[Engineering]] · [[Force]] · [[Glossary_of_systems_theory]] · `Hamiltonian_(quantum_mechanics)` · `Harald_Wergeland` · `Heat` · `Herbert_Callen` · [[Ilya_Prigogine]] · `Imaginary_unit` · [[Isolated_system]] · `Lev_Landau` · `László_Tisza` · `Matter` · [[Open_system_(systems_theory)]] · `Operator_(physics)` · `Partial_derivative` · [[Physical_system]] · [[Physics]] · `Planck_constant` · `Quantum_field_theory` · `Robert_A._Alberty` · [[Schrödinger_equation]] · `Susana_F._Huelga` · `Theory_of_relativity` · `Thermal_equilibrium` · [[Thermodynamic_equilibrium]] · [[Thermodynamic_system]] · [[Thermodynamics]] · `Thermodynamics_and_an_Introduction_to_Thermostatistics` · `Time` · `Wave_function`
## From the Real GENERATIVE library
*Closed system — placed from the Real G.E.N.E.R.A.T.I.V.E. course library (Energy room). Source: Wikimedia Commons (via Wikipedia article media). [Details & license](https://commons.wikimedia.org/wiki/File:Diagram_Systems.svg).*
> A closed system is a natural physical system that does not allow transfer of matter in or out of the system, although – in the contexts of physics, chemistry, engineering, etc. – the transfer of energy (e.g. ([Wikipedia](https://en.wikipedia.org/wiki/Closed_system))
<!-- REAL-GENERATIVE-MEDIA:END -->
> p5.js MicroSim stub · part of [[System]] · [Wikipedia source](https://en.wikipedia.org/wiki/Closed_system)
> Relation: subfield of System.
## Concept summary
A closed system is a natural [[Physical_system|physical system]] that does not allow transfer of matter in or out of the system, although the transfer of [[Energy|energy]] is allowed in the contexts of certain fields (e.g. [[Physics|physics]], [[Chemistry|chemistry]], [[Engineering|engineering]], etc).
## Build checklist
- [ ] Claim it: set `status: in-progress` + `lease` + `leased_at`
- [ ] Write the child page explaining the concept (tie it back to system)
- [ ] Finalize parameter ranges and defaults
- [ ] Implement the p5.js sketch (drawing + control regions)
- [ ] Add caption + the learning objective on the page
- [ ] Set `status: done`
## p5.js sketch
```javascript
// MicroSim: Closed system
let controls = {};
function setup() {
// createCanvas(...); create sliders for the parameters above.
}
function draw() {
// background(...); read controls; render vector field; respond live.
}
```
---
Back to [[System]] · Wikipedia: [Closed system](https://en.wikipedia.org/wiki/Closed_system)
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<!-- SEMIOTIC-PROFILE:START -->
## Semiotic profile
> *The semiotic universals this article invokes, machine-derived from the crossref — **unverified** (born so). Populated 2026-07-06 for the Systems room.*
**Universals (4):** 🟡 system (11) · 🟢 field (5) · 🟢 energy (2) · 🟢 flow (2)
**Enter by sign:** Systems Semiotic Gateway · Alphabetum · Icon Registry · ← Systems Portal
<!-- SEMIOTIC-PROFILE:END -->
<!-- REAL-GENERATIVE-MEDIA:START -->
<!-- MATTERSIM:BEGIN g33 — Matter & Energy Cluster microsim (framework build, specs/sims/Closed_system.json); do not hand-edit inside -->
**Microsim — three.js (Wikitube framework):** *Closed system*
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Closed_system.html" data-title="Closed system"></div>
*Built from `MICROSIM_GUIDE/specs/sims/Closed_system.json`; part of the [[PORTAL_Matter|Matter portal]] spine (section sims and See-also variants).*
<!-- MATTERSIM:END -->
## Wikipedia : Wikitube
**Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Closed_system) : [Wikitube](https://en.wikitube.io/wiki/Closed_system)
## Previous hub tags
Tree parent: [[Systems_theory]].
Legacy hubs: none.
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*Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*