---
license: cc-by-4.0
pretty_name: test-fixtures
---

# SubstrateCommons/test-fixtures

Replay packs (`.rpk`) built with `dmipy_sim`: one converged Monte-Carlo walk each, stored so any acquisition can be replayed on it. Load one with `ReplayPack.load("hf://SubstrateCommons/test-fixtures/<path>")`; the manifest (`manifest.json`) holds the sha256 every load is checked against. This file is rendered from the manifest by `dmipy_sim.replay.publish`.

## Substrate

`analytic/cylinder`

* box: 24 × 24 × 24 µm
* boundary: open, open, open

| pool | D (m²/s) | water fraction |
|---|---|---|
| extra | 2e-09 | 0 |
| intra | 2e-09 | 1 |

## Packs

| id | duration | walkers | bands | channels | floor | size | commit | path |
|---|---|---|---|---|---|---|---|---|
| `cylinder-r3um-T60ms` | 60 ms | 80000 | 16 | positions, boundary_local_time, compartment | 0.018 | 19.6 MB | — | `packs/cylinder-r3um-T60ms.rpk` |
| `cylinder-r4um-T50ms` | 50 ms | 60000 | 16 | positions, boundary_local_time, compartment | 0.0158 | 14.7 MB | — | `packs/cylinder-r4um-T50ms.rpk` |
| `cylinder-r4p5um-T50ms` | 50 ms | 380000 | 16 | positions, boundary_local_time, compartment | 0.0199 | 93.1 MB | — | `packs/cylinder-r4p5um-T50ms.rpk` |
| `cylinder-r5p5um-T50ms` | 50 ms | 100000 | 16 | positions, boundary_local_time, compartment | 0.0157 | 24.5 MB | — | `packs/cylinder-r5p5um-T50ms.rpk` |

## Citation

* Fick R., dmrai-lab. tessera test fixture: impermeable 3 um cylinder, D 2e-9 m^2/s, 60 ms walk (dmipy-sim de8590b).
* Fick R., dmrai-lab. tessera test fixture: impermeable 4 um cylinder, D 2e-9 m^2/s, 50 ms walk (dmipy-sim de8590b).
* Fick R., dmrai-lab. tessera test fixture: impermeable 4.5 um cylinder, D 2e-9 m^2/s, 50 ms walk (dmipy-sim de8590b).
* Fick R., dmrai-lab. tessera test fixture: impermeable 5.5 um cylinder, D 2e-9 m^2/s, 50 ms walk (dmipy-sim 32df653, CUDA backend).