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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Visualization
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Journal DOI :
The Korean Society of Visualization
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Volume & Issues
Volume 4, Issue 2 - Dec 2006
Volume 4, Issue 1 - Jun 2006
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A Study on the Scientific Visualization in Ocean-Atmospheric Sciences
Kim Dong-Hoon ;
Journal of the Korean Society of Visualization, volume 4, issue 1, 2006, Pages 3~7
This study reviews on the classification of the scientific visualization and the tools in ocean-atmospheric sciences. We have classified scientific visualization according to the purpose and data size; the visualization tools used commonly in the field are also enlisted. The examples of visualization using scalar and vector data are presented, and their distinctions are noted. Lastly, it is contemplated on the near future trend in the field and provided future directions.
Kim Sang-Moon ; Yoon Sang-Youl ; Kim Kyung-Chun ;
Journal of the Korean Society of Visualization, volume 4, issue 1, 2006, Pages 8~13
Fire simulation has been developed for decades to analyze fire cases and provide a tool to study fundamental fire dynamics and combustion. There are three way of fire simulation which are a full scale simulation, an experimental simulation and a computational simulation. In case of a full scale simulation, because a higher cost, a higher risk, more efforts are needed, a demand for it has been decreased. But recently a demand for an experimental simulation and a computational simulation has been increased. A computational simulation has several advantages; lower cost, short period, many case studies, more visual results, a quantitative result and etc. FDS(Fire Dynamics Simulator) which has been developed in BFRL(Building and Fire Research Laboratory), NIST(National Institute of Standards and Technology) is a popular world wide code for fire simulation. Lack of accurate predictions by the model could lead to erroneous conclusions with regard to fire safety. All results should be evaluated by the informed judgment of the qualified user.
Lee Sang-Yeol ;
Journal of the Korean Society of Visualization, volume 4, issue 1, 2006, Pages 14~19
Kim Kyung-Chun ; Lee Sang-Joon ; Sung Jae-Young ; Doh Deog-Hee ;
Journal of the Korean Society of Visualization, volume 4, issue 1, 2006, Pages 24~30
A Numerical Study on Electro-osmotic Flow and Stirring Characteristics in a Microchannel with Local Adjustment of Electric Potential
Suh Yong-Kweon ; Heo Hyeng-Seok ;
Journal of the Korean Society of Visualization, volume 4, issue 1, 2006, Pages 31~40
In this study a newly designed electro-osmotic micro-mixer is proposed. This study is composed of a channel and metal electrodes attached locally on the side wall surface ultimately to control the mixing effect. To obtain the flow patterns, numerical computation was performed by using a commercial code, CFD-ACE. The fluid-flow solutions are the cast into studying the characteristics of stirring in terms of the mixing index. It was shown that the local control of the electric potential can indeed contribute to the enhancement of mixing effect.
Analysis of Fluid Structure Interaction on 100kW-HAWT-blade
Kim Yun-Gi ; Kim Kyung-Chun ;
Journal of the Korean Society of Visualization, volume 4, issue 1, 2006, Pages 41~46
In this study, one-way fluid structure interaction analysis(FSI) on wind turbine blade was performed. Both a quantitative fluid analysis on 3-bladed wind turbine and a structural analysis using the surface pressure data resulting from fluid analysis were carried out. Streamlines and angle of attack was easily acquired from analysis results, we showed the inlet velocity that the stall begins to occur. In the structural analysis, structural displacement and maximum stress of the two comparative models was calculated. The location that has maximum stress was found. The pressure difference between back and front part of the blade increases as the inlet velocity increase. The torque and maximum with regard to inlet velocity was also presented.
In vitro study of downstream flow passing through heart valve prostheses
Kim Hyoung-Bum ; Lanning Craig ;
Journal of the Korean Society of Visualization, volume 4, issue 1, 2006, Pages 47~55
The left ventricular filling flow is now considered as an indicator which can be used for early diagnosing of cardiovascular diseases. Because the understanding of left ventricular flow physics is critical for this purpose, the downstream flow characteristics of the artificial heart valve are investigated using particle image velocimetry (PIV) method. In this study, we investigated the wake characteristics of flows passing through three different artificial valves (St.Jude medical bileaflet mechanical valve. Bjork-Shiley monostrut mechanical valve and St.Jude medical Biocor bio valve). The downstream flow field has remarkably altered according to the different valves. SJM MHV has the flow field similar to the pulsating circular jet and BS MHV has oblique pulsating jet. SJM BHV shows the similar flow field of clinical data of normal heart.
A Change of Three-Dimensional Vortical Structures by an Air Spoiler in the Wake of a Road Vehicle
Kim Jin-Seok ; Sung Jae-Yong ; Kim Sung-Cho ; Kim Jeong-Soo ;
Journal of the Korean Society of Visualization, volume 4, issue 1, 2006, Pages 56~61
A change of three-dimensional vortical structures on the wake behind a road vehicle has been investigated according to the existence of an air spoiler. To reconstruct the three-dimensional velocity fields, two-dimensional PIV(particle image velocimetry) measurements were performed for lots of the x-y, y-z and z-x planes. Since the isovorticity surface does not represent exactly the vortical structures within the recirculation region due to strong shear flows, the velocity component normal to the x-y plane is obtained by interpolating those velocities in the z-x plane. Then, the
is applied to visualize the vortices in the recirculation region. As a result, it is found that the air spoiler weakens C-pillar vortices and produces strong wing-tip vortices. Inside the recirculation region, the height and volume of coherent vortices are increased relatively when an air spoiler is equipped. On the other hand, two small coherent vortices are observed in case that an air spoiler is absent.