Layout B (2 x 2 mm) has the lowest straight-passage pumping power among candidates passing the stated screening gates.
| Layout | Guard wall C | Guard pressure Pa | Passes |
|---|---|---|---|
| A | 62.58975686097335 | 6486.788603608646 | False |
| B | 70.85176439208578 | 810.8485754510807 | True |
| C | 87.37577945431063 | 101.35607193138509 | False |
Analytical, constant-property, single-phase water screening. Equal flow and heat split in straight circular passages; uniform heat flux around the whole wetted perimeter. Temperature means wetted inner wall, not an external component. No CAD import, solid conduction, contact resistance, manifold/entry/bend losses, experimental validation or thermal CFD. Pressure is straight-passage friction only. Safety factors are explicit scenarios, not confidence intervals.
Download the LaTeX PDF in Results for charts, derivation and verification.