raw · papers · ingested 2026-07-19
On the Impact of Aspect Ratio and Other Geometric Effects on the Stability of Rectangular Thermosiphons
Source: https://arxiv.org/abs/2304.03404
Authors: Tri Nguyen, Elia Merzari. arXiv:2304.03404, submitted April 6, 2023.
Key findings
Studies loop-length-to-pipe-diameter ratio (Lt/D) from 10 to 200. Below a certain Lt/D, one-dimensional flow assumptions break down and 3D effects, swirl modes, and flow-reversal oscillations appear. Confirms that shrinking a thermosiphon loop’s overall proportions — exactly what happens going from building-scale to doghouse-scale — fundamentally destabilizes the flow physics, not just weakens it.
Why it matters for this archive
Gives a mechanistic, peer-reviewed-adjacent explanation for why miniaturizing a Double Play-style thermosiphon loop is risky: it isn’t simply “slower circulation,” it’s a qualitative shift into unpredictable, oscillatory flow. See Miniature thermosiphon scaling limits.