Yonsei University · Engineering
Hyung Hee Cho 교수의 연구실은 열·유체역학 및 메타물질을 기반으로 한 다중 스펙트럼 신호 제어 기술을 핵심으로 연구를 진행하고 있습니다. 특히, 마이크로파를 흡수하면서 적외선 복사를 선택적으로 방출하는 계층적 메타물질(HMM)을 활용한 다중 스펙트럼 카모플라주 기술과, 투과성 판을 통한 열전달 및 냉각 성능 향상 기술에 초점을 맞추고 있습니다. 연구는 주로 유동장 내 국소 열/질량 전달 특성, 영화 냉각 구조의 최적화, 그리고 나프탈렌 기반 질량 전달 측정 기법을 활용한 실험적 분석을 포함합니다.
Figures are computed from collected data and may differ slightly.
Abstract Camouflage is an emerging application of metamaterials owing to their exotic electromagnetic radiative properties. Based on the use of a selective emitter and an absorber as the metamaterials, most reported articles have suggested the use of single‐band camouflage, however, multispectral camouflage is a challenging issue owing to a difference of several orders of magnitude in the unit cell structure. Herein, hierarchical metamaterials (HMMs) for multispectral signal control when dissipa
The present study is conducted to investigate the local heat/mass transfer characteristics for flow through perforated plates. A naphthalene sublimation method is employed to determine the local heat/mass transfer coefficients on the effusion plate. Two parallel perforated plates are arranged in two different configurations: staggered and shifted in one direction. The experiments are conducted for hole pitch-to-diameter ratios of 6.0, for gap distance between the perforated plates of 0.33 to 10
The present study investigates the local heat (mass) transfer characteristics of flow through perforated plates. Two parallel perforated plates were placed, relative to each other, in either staggered, in line, or shifted in one direction. Hole length to diameter ratio of 1.5, hole pitch to diameter ratio of 3.0, and distance between the perforated plates of 1–3 hole diameters are used at hole Reynolds numbers of 3000 to 14,000. For flows through the staggered layers and the layers shifted in on
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