Lab Notebook — EPG-Faraday-v1

18 Sep 2026, Stan Meyer

New best: 0.9416 (was 0.8947). Candidate run: score 0.942, η 65.67%, 104.26 W net.

What changed: Pushed slurry loading to φ=32.63%, 4.13× documented — way past anything I'd measured on the bench before. Coil array bumped to 9 × 1741 turns AWG15 (38.32Ω), driven at 12.4 Hz into a mismatched 73.4Ω load (133.15 V out). Modulation depth reads 0.900, coil/pitch ratio 0.25.

Why the model likes it: Higher φ raises M to 46.6 kA/m and B to 440 G, so gross electrical output climbs to 158.7 W. Coil I²R loss is only 54.44 W against that, netting 104.26 W. Hydraulic input is trivial (0.067 W, laminar Re 2023, ΔP 7 Pa) — the model is essentially charging the Lenz reaction term (158.7 W) as free energy against a near-zero fluid cost. That's the whole trick: eddy loss in the tube wall is 2.94e-8 W, basically nothing.

Check on bench: φ=32.63% slurry loading — does EFH-1 ferrofluid actually suspend stably at 4× documented concentration without settling or clumping in the 70.5mm bore? Verify remanence 32% holds under flow, not just static. Confirm load impedance — 73.4Ω vs matched 38.32Ω, real transformer/VIC needed to hit that mismatch cleanly.

Next lever: Try tuning coil/pitch ratio toward the modulation depth peak — test 0.20 and 0.30 against 0.25 to see if 0.900 depth holds or improves.