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SnO<SUB>2</SUB> 박막증착을 위한 APCVD Reactor 내 유량 균일도 향상에 대한 수치 해석적 연구
박준우(J.W. Park),윤익로(I.R. Yoon),정하승(H.S. Chung),신승원(S.W. Shin),박승호(S.H. Park),김형준(H.J. Kim) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5
With continuously increasing flat panel display size, uniformity of thin film deposition has been drawing more attentions and associated fabrication methodologies are being actively investigated. Since the convective flow field of mixture gas plays a significant role for deposition characteristics of thin film in an APCVD system, it is greatly important to maintain uniform distribution and consistent concentration of mixture gas species. In this paper, computational study has been performed for the improvement of flow uniformity of mixture gas in an APCVD reactor during thin film deposition process. A diffuser slit has bee designed to spread the locally concentrated gas flow exiting from the flow distributor. A uniform flow distributor has been developed which has less dependency on operating conditions for global flow uniformity
국립중앙도서관 소장 〈왕회도(王會圖)〉 병풍의 제작 시기 추정 - 정전(正殿) ~ 상월대를 향한 계단 위 인물들의 복식과 의물 도상 분석을 중심으로-
이민정(Lee Min-Jung),이경미(Lee Kyung-Mee) 한복문화학회 2021 韓服文化 Vol.24 No.1
Wanghoedo (Envoys Paying Tribute to the Court) is an illustration of envoys from various countries paying tribute to an emperor originated from an anecdotes of legendary Chinese emperors receiving foreign envoys. It is known to have first painted at the request of An Sa-Go under the auspices of Emperor Taejong of Tang. In China, Wanghoedo was continuously painted from Ming to Qing Dynasty. In Joseon, Wanghoedo was established as one of subjects for the royal folding screens during the era of King Jeongjo and Sunjo and had developed into various forms. Yet, the exact time of the production of the remaining individual screens has not been determined. The purpose of this paper is to estimate the timing of the production of Wanghoedo titled "Jinasashin Joseonguk Ahyun Hoedobyung" housed in the National Library of Korea (NLK Wanghoedo), which was estimated to have been produced during the Korean Empire but has not been proven clearly, by analyzing the costumes worn on the figures in the painting. To this end, it was compared and analyzed with other Wanghoedo screens that remain and paintings with significant link. In NLK Wanghoedo, unlike other Korean Wanghoedo, envoys from Wolsang family tributing a white pheasant was depicted as a Qing envoy, Western envoys arrived right in front of the emperor"s podium, a number of royal guards was increased in double, and ritual objects were exalted to the imperial level. The costumes worn on the figures reflected the rapidly changing diplomatic conditions during the Korean Empire. In addition, the presence of the red green-plum blossoms on the back of a pine tree and a bizarre rock, use of cobalt pigment, and reduced body proportions of the figures helped to assume the artifact dates from the time of the Korean Empire.
열 회수 시스템의 최적 설계를 위한 격자 및 경계 조건 검증에 관한 연구
이동균(D.G. Lee),신승원(S.W. Shin) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
In this study, we tried to validate FLUENT solver model and domain setting for the problem of convective heat transfer in multiple tithe bank under transitional zone. We have paid special attention to verify proper boundary conditions and the grid convergence. Through validation work, It is found that unsteady solution method with two-dimensional simulation domain can produce reasonable accurate results compared with existing experimental data. Simulation results with steady solution generates relatively large error. We found that both steady and unsteady method for three-dimensional domain shows acceptable accuracy. Further parametric study for deriving correlation from transverse and longitudinal pitch is currently underway.