http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
나선형 마이크로/나노 로봇의 규모와 표면특성이 유영에 미치는 영향에 관한 수치적 연구
신규식(Gyu Sik Shin),조기영(Ki Yeong Jo),김영웅(Young Woong Kim),양시영(Si Young Yang),김형민(Hyung Min Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
This study analyzed the swimming characteristics of helical micro/nano robots in the no-slip condition and the slip condition. For the micro/nano scales with Knudsen number greater than 0.01, the Maxwell slip model was applied to analyze the effect of slip on the wall. Micro/nano swimming robot with a large Knudsen number had a large slip effect, which caused the swimming speed to be relatively slow. Meanwhile, the flow characteristics were analyzed considering the effects of hydrophilicity and hydrophobicity on slip. We found that even if the Knudsen number is constant, when the surface effect of the swimming robot is hydrophilic, the propulsion force increases compared to the case of hydrophobicity. The propulsion efficiency also demonstrated the same trend as the swimming speed, and the maximum efficiency was 0.097%, which is the efficiency of the no-slip condition on the wall.
나선형 마이크로/나노 로봇의 규모와 표면특성이 유영에 미치는 영향에 관한 수치적 연구
신규식(Gyu Sik Shin),조기영(Ki Yeong Jo),김영웅(Young Woong Kim),양시영(Si Young Yang),김형민(Hyung Min Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
This study analyzed the swimming characteristics of helical micro/nano robots in the no-slip condition and the slip condition. For the micro/nano scales with Knudsen number greater than 0.01, the Maxwell slip model was applied to analyze the effect of slip on the wall. Micro/nano swimming robot with a large Knudsen number had a large slip effect, which caused the swimming speed to be relatively slow. Meanwhile, the flow characteristics were analyzed considering the effects of hydrophilicity and hydrophobicity on slip. We found that even if the Knudsen number is constant, when the surface effect of the swimming robot is hydrophilic, the propulsion force increases compared to the case of hydrophobicity. The propulsion efficiency also demonstrated the same trend as the swimming speed, and the maximum efficiency was 0.097%, which is the efficiency of the no-slip condition on the wall.
이류체 세정공정에서 이물질 포집 장치 개발에 관한 수치적 연구
김영웅(Young Woong Kim),신규식(Gyu Sik Shin),조기영(Ki Yeong Jo),양시영(Si Young Yang),김형민(Hyung Min Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
The purpose of the research is to develop a device to prevent secondary contamination by particles removed in the cleaning process of small precision plastic lens injection molds. The particle capturing device consists of two-fluid jet injection inlet for cleaning and another inlet of atmospheric air to maintaining the cleaning effect and an outlet for inhale the particles by applying vacuum pressure. The optimal air intake size was 0.12L and the outer shape of the device was proposed to have an inclination of 45°. In addition, a baffle was installed between the injection and the suction port inside the device to maximize the cleaning and capturing effect. The optimal length of the baffle was evaluated by analyzing the flow and particle behavior. The length of the cylindrical shape of the baffle with a constant cross section is suitable for 1.8L, 2.4L, and 3L, and the optimal length for the conical shape of the baffle was evaluated to be 3L.
이류체 세정공정에서 이물질 포집 장치 개발에 관한 수치적 연구
김영웅(Young Woong Kim),신규식(Gyu Sik Shin),조기영(Ki Yeong Jo),양시영(Si Young Yang),김형민(Hyung Min Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
The purpose of the research is to develop a device to prevent secondary contamination by particles removed in the cleaning process of small precision plastic lens injection molds. The particle capturing device consists of two-fluid jet injection inlet for cleaning and another inlet of atmospheric air to maintaining the cleaning effect and an outlet for inhale the particles by applying vacuum pressure. The optimal air intake size was 0.12L and the outer shape of the device was proposed to have an inclination of 45°. In addition, a baffle was installed between the injection and the suction port inside the device to maximize the cleaning and capturing effect. The optimal length of the baffle was evaluated by analyzing the flow and particle behavior. The length of the cylindrical shape of the baffle with a constant cross section is suitable for 1.8L, 2.4L, and 3L, and the optimal length for the conical shape of the baffle was evaluated to be 3L.