九州大学 · 工学
Akio Miyara教授の研究室は、流体の熱伝達・流れ挙動に注目し、特に垂直壁を流下する凝縮膜の波動発展や、微細構造を有するチューブ内での相変化流れの挙動を数値シミュレーションと実験によって解明しています。低GWPフロン系冷媒の物性データの測定と相関式の構築にも取り組んでおり、高効率な熱ポンプやオーガニックランキンサイクルの開発に貢献しています。主に熱交換器の性能向上と環境に配慮した冷媒の応用を目的とした基礎的・応用的研究が進められています。
Figures are computed from collected data and may differ slightly.
Wave evolution and heat transfer behavior of a wavy condensate film down a vertical wall have been investigated by a finite difference method, in which the algorithm is based on the HSMAC method, and a staggered grid fixed on a physical space is employed. For the moving interface, newly proposed methods are used. A random perturbation of the film thickness is generated near the leading edge. The perturbation quickly diminishes once and small-amplitude long waves are propagated downstream. Then t
The principal goals of the present work are to measure the viscosity of vapor and liquid cis-1,1,1,4,4,4-hexafluoro-2-butene (R-1336mzz(Z)) and propose simplified correlations of the extracted data under saturation conditions for industrial design and simulation. R-1336mzz(Z), a hydro-fluoro-olefin with a low global warming potential and attractive environmental properties, can be considered as a potential working fluid for high-temperature heat pumps and organic Rankine cycles. Nevertheless, re
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