Stokes settling velocity

Code snippets

curl "https://api.oanor.com/settling-api/v1/stokes" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/settling-api/v1/stokes", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/settling-api/v1/stokes");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/settling-api/v1/stokes",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "note": "vt = (ρp − ρf)·g·d²/(18·μ). Valid for creeping flow Re < 1; above that use the drag-based terminal velocity. A negative vt means the particle rises.",
        "inputs": {
            "fluid_density": 1000,
            "particle_density": 2650,
            "dynamic_viscosity": 0.001,
            "particle_diameter": 0.0001
        },
        "stokes_valid": true,
        "terminal_velocity_m_s": 0.0089925,
        "terminal_velocity_mm_s": 8.9925,
        "particle_reynolds_number": 0.89925
    },
    "meta": {
        "timestamp": "2026-06-04T18:38:23.349Z",
        "request_id": "6b222f3b-9798-4c25-981f-13be383be2f3"
    },
    "status": "ok",
    "message": "Stokes settling velocity",
    "success": true
}