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화학사고 발생시 화학사고물질의 실내유입에 따른 피해 최소화 방안 연구
전현우(Jeon, Hyunwoo),김지수(Kim, Jisoo),최정숙(Choi, Joungsook),서지훈(Seo, Jihoon),최윤희(Choi, Yun-Hee),손종렬(Sohn, Jongryeul),김민영(Kim, Minyeong),정나나(Jeong, Na-na) 한국퍼실리티매니지먼트학회 2020 한국퍼실리티매니지먼트학회지 Vol.15 No.2
This study was conducted to find ways to minimize damage caused by the infiltration of hazardous chemicals into the residential area in the event of a chemical accident. The investigation was conducted on major hazardous chemicals by investigating cases of indoor infiltration among chemical accidents at home and abroad. In addition, the management plan for chemical accidents at facilities classified as vulnerable facilities(housing and public facilities, research institutes, subways) was investigated. Based on these findings, the current policies were reviewed and suggestions were made to minimize damage caused by indoor infiltration in the event of chemical accidents.
표면탄성파 유도 미세 와류를 활용한 액적 내 화학적 농도 제어
김우혁(Woohyuk Kim),전현우(Hyunwoo Jeon),박진수(Jinsoo Park) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Droplet based microfluidics with micro droplets generated from immiscible fluids could be utilized for various of fields like drug screening, production of microparticles, biochemical analysis based on droplets. As importance of drug screening for patient-specific precision medicine and development for new drug increases, necessity of technique for controlling chemical concentration in nanoliter scale droplets are required. In this research, by adopting micro vortices inside of microchannel generated from acoustic streaming flow, control of chemical concentration was available which promises a control of in-droplet chemical concentration.
초음파 유도 가열 기반 가속된 용질성 마랑고니 유동을 이용한 미세 액적 혼합
차범석(Beomseok Cha),김우혁(Woohyuk Kim),윤기성(Giseong Yoon),전현우(Hyunwoo Jeon),박진수(Jinsoo Park) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
In digital microfluidics, droplet-based technology has inherent limitation of the quiescent flow condition at low Reynolds number, which causes mixing samples confined within the droplets to be challenging. Recently, solutal Marangoni-driven vortical flows have emerged as a promising approach for digital microfluidic mixing. Despite its simplicity, the solutal Marangoni effect still demands a long time for sample mixing, which makes it difficult to be utilized for practical engineering applications. Here, we propose a new digital microfluidic mixing method by accelerated solutal Marangoni flows in liquid sessile drops based on improved ultrasound-induced heating device. We theoretically and experimentally investigated the accelerated Marangoni flow and confirmed that droplet mixing can be achieved within a few seconds even for high viscosity liquids. The proposed heater-embedded droplet mixing platform can be fabricated in small size, allowing it to be integrated with other microfluidic platforms. We believe that the proposed droplet mixing platform can be utilized for a variety of practical applications in bioassays, clinical diagnostics, and drug screening.