http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Sungwon Shin 한국산업응용수학회 2007 한국산업응용수학회 학술대회 논문집 Vol.3 No.2
When we solve Navier Stokes and Energy equations with finite element method, finally we have to solve the linear system Ax = b which A is a large sparse matrix and not a band matrix. So it would need large memory and take long time to compute it if we use a general matrix data structure for a linear system. In this paper I solve the time-dependent incompressible Navier-Stokes and Energy equation with finite element method and the linear system obtained from them using a sparse data structure which is the compressed column format so that I get a solution for each time step within a few seconds.
Lamellar keratoplasty using position-guided surgical needle and M-mode optical coherence tomography
Shin, Sungwon,Bae, Jung Kweon,Ahn, Yujin,Kim, Hyeongeun,Choi, Geonho,Yoo, Young-Sik,Joo, Choun-Ki,Moon, Sucbei,Jung, Woonggyu SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS 2017 JOURNAL OF BIOMEDICAL OPTICS Vol.22 No.12
A study on the optimal shape of wave energy conversion system using an oscillating water column
Shin, Sungwon,Lee, Kwang-Ho,Kim, Do-Sam,Kim, Kyu-Han,Hong, Keyyong BioOne (Coastal Education and Research Foundation) 2013 JOURNAL OF COASTAL RESEARCH Vol.65 No.-
<P> With the intention of diversifying energy sources, the use of natural and renewable energy sources such as sunlight, wind, tides, geothermal heats and waves is attracting favorable attention. Furthermore, current environmental issues, including global warming, ozone depletion and nuclear problems, promote development of renewable energy technologies. Many renewable energy technologies are however still under progress. Among these, the wave energy conversion system using an oscillating water column (OWC) is nearing commercial stage. OWC use the air flow induced by the vertical motion of water column in the air chamber as a driving force of turbine. Although it is well known that OWC is one of the most efficient devices to harness wave power, there is still much uncertainty about the relationship between the optimal shape and its hydrodynamic performance under the confined wave conditions. In this study, we propose a new computational fluid dynamics solver using on the immiscible two-phase (gas and water) flow model to simulate an OWC system in a two and three dimensional numerical wave tank. The numerical experiments focus on air flow velocity directly related to the working of turbine to survey the optimal shape. In order to validate the developed numerical model, laboratory experiments for the simplified OWC are carried out in a wave tank under regular wave conditions. The comparisons between the results of the developed numerical model and experimental data reveal a favorable agreement between the air flow velocity as well as the water surface profiles. Based on the validated numerical model, the effects of the inlet and chamber shapes including length, height, width and slope on the maximum air flow velocity are numerically investigated. As a result, in case the non-dimensional chamber width normalized by the incident wave length is in the range of 0.12 to 0.43, the maximum air flow velocity occurs with the increase of the inlet height and shortness of the inlet length. </P>