Darcy-Weisbach head loss

Code snippets

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

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

$ch = curl_init("https://api.oanor.com/darcy-api/v1/headloss");
curl_setopt($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/darcy-api/v1/headloss",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "formula": "hf = f·(L/D)·v²/(2g); Δp = ρ·g·hf.",
        "length_m": 100,
        "diameter_m": 0.1,
        "head_loss_m": 3.874922,
        "velocity_ms": 2,
        "density_kg_m3": 998,
        "friction_factor": 0.019,
        "pressure_drop_pa": 37924,
        "pressure_drop_bar": 0.37924,
        "pressure_drop_kpa": 37.924
    },
    "meta": {
        "timestamp": "2026-06-04T10:18:50.079Z",
        "request_id": "7cb0f1e1-aaf2-4803-b41a-d654f89f4e53"
    },
    "status": "ok",
    "message": "Darcy-Weisbach head loss",
    "success": true
}