Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Visualization
Journal Basic Information
Journal DOI :
The Korean Society of Visualization
Editor in Chief :
Volume & Issues
Volume 5, Issue 2 - Dec 2007
Volume 5, Issue 1 - Jun 2007
Selecting the target year
Countermeasures on Yellow Dust Problem
Kim, Jung-Soo ; Doh, Deog-Hee ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 3~8
DOI : 10.5407/JKSV.2007.5.2.003
Yellow dust problem is one of serious environmental problems in East Asia. The earth's abnormal climate changes and rapid industrializations over the mainland China seem to make the matter worse than ever before. In order to solve the yellow dust problem, collaborative works are necessary not only in the fields of meteorology and engineering, and but also through national consistent policies beyond the nations. In this regards, reporting on current policies of our meteorological administrative on the yellow dust problem can be regarded as valuable services for the engineers working in the fields of energy and environments.
Typhoon Simulation with GME Model
Oh, Jai-Ho ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 9~13
DOI : 10.5407/JKSV.2007.5.2.009
Typhoon simulation based on dynamical forecasting results is demonstrated by utilizing geodesic model GME (operational global numerical weather prediction model of German Weather Service). It is based on uniform icosahedral-hexagonal grid. The GME gridpoint approach avoids the disadvantages of spectral technique as well as the pole problem in latitude-longitude grids and provides a data structure extremely well suited to high efficiency on distributed memory parallel computers. In this study we made an attempt to simulate typhoon 'NARI' that passed over the Korean Peninsula in 2007. GME has attributes of numerical weather prediction model and its high resolution can provide details on fine scale. High resolution of GME can play key role in the study of severe weather phenomenon such as typhoons. Simulation of future typhoon that is assumed to occur under the global warming situation shows that the life time of that typhoon will last for a longer time and the intensity will be extremely stronger.
The 60th Annual Meeting of The APS Division of Fluid Dynamics 참가기
Choi, Young-Ho ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 14~15
DOI : 10.5407/JKSV.2007.5.2.014
응용 열유체 실험실
Sohn, Chang-Hyun ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 16~19
DOI : 10.5407/JKSV.2007.5.2.016
Geometry Realization of an Airplane and Numerical Flow Visualization
Kim, Yang-Kyun ; Kim, Sung-Cho ; Kim, Jeong-Soo ; Choi, Jong-Wook ; Park, Jeong ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 20~25
DOI : 10.5407/JKSV.2007.5.2.020
The geometry of a commercial passenger airplane is realized based on a Boeing 747-400 model through the photographic scanning and reverse engineering. The each element consisting of the plane such as fuselage, wing, vertical fin, stabilizer and engines, is individually generated and then the whole body is assembled by the photomodeler. The maximum error in the realized airplane is about 1.4% comparing with the real one. The three-dimensional inviscid steady compressible governing equations are solved in the unstructured tetrahedron grid system, and in a finite volume method using STAR-CD when the airplane flies at the cruise condition. The pressure distribution on the surface and the wing-tip vortices are visualized, and in addition to the aerodynamics coefficients, lift and drag are estimated.
Measurements of a Ship's Propeller Wake with Stereoscopic-PIV and Stereoscopic-PTV
Doh, Deog-Hee ; Hwang, Tae-Gyu ; Lee, Sang-Joon ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 26~32
DOI : 10.5407/JKSV.2007.5.2.026
Stereoscopic PTV and Stereoscopic-PIV measurements have been carried out for the studies of the wake of a ship's propeller. Stereoscopic photogrammetry based on a 3D-PTV principle was introduced using two high-definition cameras(1k x 1k, 30Hz). The arrangement of the two cameras was based on angular position. The pair-matching of the three-dimensional velocity vectors were based on Genetic Algorithm based 3D-PTV technique. The results obtained by both measurement systems have been compared at the advance ratio J=0.88(290 rpm, d=54 mm). Turbulent properties have also been compared each other at the same condition.
Visualization of Water Distribution in a Polymer Electrolyte Fuel Cell Using an X-ray Imaging Technique
Lim, Nam-Yun ; Park, Gu-Gon ; Kim, Chang-Soo ; Lee, Sang-Joon ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 33~38
DOI : 10.5407/JKSV.2007.5.2.033
Water management in polymer electrolyte fuel cell (PEFC) has been receiving large attention as an important issue in practical applications. Proper water management is vital to achieve high performance and durability of PEFC. In this study, an X-ray imaging technique was employed to visualize the water distribution in a PEFC quantitatively. X-ray images of the PEFC components with and without water were distinguished clearly. From the visualized X-ray images, we could evaluate the water distribution in the region between separator and gas diffusion layer (GDL) quantitatively. In addition, the contact angle of water in the micro-channels was also clearly visualized.
Experimental Study on the Droplet Formation in a Microchannel with a Cross Junction
Park, Jae-Hyoun ; Bae, Ki-Hwa ; Heo, Young-Gun ; Suh, Yong-Kweon ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 39~47
DOI : 10.5407/JKSV.2007.5.2.039
This paper describes an experimental study on the droplet formation and the subsequent motion in a microchannel having a cross junction. While one kind of liquid (pure water or water-surfactant mixture) is drawn into a horizontal inlet channel, the other kind (oil) is introduced through two vertical inlet channels. Due to the effect of surface tension on the interface between the two fluids, the droplets of the first fluid are formed near the cross junction. In this study, we have found that the droplet formation is affected even by slight difference in the surface tension. When the surface tension between two fluids is decreased, the droplet size is decreased in order to keep the equilibration between the pressure and the surface tension. In addition, the time interval between each of the droplet formations is decreased and the distance between droplets is also decreased when the surface tension is decreased.
An Experimental Study on Flow Structure inside a Display Cooler Using PIV Techniques
Park, Cheol-Woo ; Baek, In-Je ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 48~55
DOI : 10.5407/JKSV.2007.5.2.048
Flow structure inside a refrigerating compartment of a scale-down display cooler model was investigated experimentally by using PIV (particle image velocimetry) method, a reliable velocity field measurement technique, in the present study. In addition, we also carried out flow visualization regarding flow structure and particle movement inside a display cooler by using a tracer method. As a result, the mean velocity field measurement shows a large scale vortical flow structure inside a refrigerating compartment due to strong entrainment flow, going through a base plate open gaps.
Aerodynamic Characteristics of Delta Wing According to Leading Edge Geometries
Jin, Hak-Su ; Kim, Sung-Cho ; Kim, Jeong-Soo ; Choi, Jong-Wook ;
Journal of the Korean Society of Visualization, volume 5, issue 2, 2007, Pages 56~63
DOI : 10.5407/JKSV.2007.5.2.056
Flow visualization and aerodynamic characteristics of delta wings with two different leading edge geometries are investigated by PIV system and wind tunnel balance when the Reynolds number is about based on the freestream velocity and the root chord length. Delta wing models have 65-deg swept angle, and the leading edge shapes are divided into round- and sharp- type. The experimental results indicated that the leading-edge vortex strength and aerodynamic coefficient in the round leading edge are stronger and more, respectively than those in the sharp one. Therefore the flow interactions between vortices and the boundary layer are more desirable or more rapidly swirled in the round-type leading edge.