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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 8, Issue 4 - Dec 2010
Volume 8, Issue 3 - Sep 2010
Volume 8, Issue 2 - Jun 2010
Volume 8, Issue 1 - Mar 2010
Volume 7, Issue 2 - Jan 2010
Selecting the target year
Report on the 14
International Symposium on Flow Visualization
Doh, Deog-Hee ; Kim, Kyung-Chun ; Lee, Sang-Joo ; Kim, Sung-Kyun ; Kim, Heuy-Dong ; Ko, Han-Seo ;
Journal of the Korean Society of Visualization, volume 8, issue 3, 2010, Pages 1~5
The 14th International Symposium on Flow Visualization (ISFV14) was held at Daegu (Korea), June 21-24, 2010. The number of participants was 304 from 17 countries. The number of papers presentated was 243 from 19 countries. Two special lectures and four invited lectures, 48 paper sessions, and one poster session were opened in five and in a lobby for four days. Special events such as awarding "the Asanuma Award" and "the Leonardo Da Vinci Award" to the prominent contributors were also held. Photo and Movie Awards were given to three scientists for the excellences in their photos and movies. Among 48 sessions 5 sessions were on Biological Flows and on Micro/Nano Fluidics, which were the largest session number. 4 sessions were held on Compressible and Sonic Flows, and on PIV/PTV. 3 sessions were held on Swirl Flows, Image Processing, and on Industrial Applications. Other sessions on LIF, Wake and Vortex Flows, Physiological Flows, Environment Flows, Measurements Techniques, and on Reacting Flows.
Nano/Micro Systems Laboratory
Byeon, Do-Yeong ;
Journal of the Korean Society of Visualization, volume 8, issue 3, 2010, Pages 6~11
A Review on Swirling Flow by Using Flow Visualization Techniques in the Circular Tubes
Chang, Tae-Hyun ; Doh, Deog-Hee ; Lee, Kwoon-Soo ;
Journal of the Korean Society of Visualization, volume 8, issue 3, 2010, Pages 12~21
DOI : 10.5407/JKSV.2010.8.3.012
Swirling flows are found in very wide range of applications, for examples, cyclone separators, spraying machines, heat exchangers and jet pumps, ect. Relatively, little work has been done on the swirl flow using flow visualization techniques. This study deals with many visualization techniques to study on swirling flow. These techniques are related to oil films methods, smoke, dye liquids, liquid crystal, stroboscope light, smoke wire, white light, naphthalene sublimation, LDV(lase doppler Velocimetry) and PIV(particle image velocimetry). The present work has handled single, annular, carved tube, swirl expansion and swirl wake using several visualization methods in the vertical and horizontal circular tube.
Experimental Study on Micro PIV Measurement using a Micro Liquid Lens
Jeong, S.R. ; Dang, T.D. ; Choi, J.H. ; Kim, G.M. ; Park, C.W. ;
Journal of the Korean Society of Visualization, volume 8, issue 3, 2010, Pages 22~28
DOI : 10.5407/JKSV.2010.8.3.022
In the present study, we performed the velocity field measurement in a microchannel using a focal length variable micro liquid lens. The liquid lens is used as a beam expander in a micro-PIV system to acquire the scatter image of the seeded particle. A thin film-type micro liquid lens was made of PDMS material and it was attached on top of the 700-micron-wide working fluid supply channel trench. As a result, the focal length and contact angle of the liquid lens changed with variations in applied pressure.
Design and Evaluation of a Uniform Flow Microreactor
Park, Ji-Min ; Yi, Seung-Jae ; Kim, Kyung-Chun ;
Journal of the Korean Society of Visualization, volume 8, issue 3, 2010, Pages 29~34
DOI : 10.5407/JKSV.2010.8.3.029
This paper proposes a design method to provide uniform flow in a microreactor. Uniform momentum approach is adopted with 10 pillars before and after the chamber having a different slope inlet channel. The slope and number of pillars are two factors to make a uniform flow in the microreactor, covering the hexagonal gold layer. The CFD analysis about the designed microreactor is carried out and the velocity vector field measurements are made in the fabricated microreactor by micro PIV technique. The uniformity of microreactor flow was confirmed by both numerical simulation and experimental results.
Study of Different Radial Temperature Gradient Effect on Taylor-Couette Flow Instability
Cha, Jae-Eun ; Liu, Dong ; Tu, Xin Cheng ; Kim, Hyoung-Bum ;
Journal of the Korean Society of Visualization, volume 8, issue 3, 2010, Pages 35~40
DOI : 10.5407/JKSV.2010.8.3.035
We have investigated different radial temperature gradient effect on the stability of Taylor-Couette flow. The radius ratio and aspect ratio of the model was 0.825 and 48, respectively. Two heating exchangers were used for generating different temperature gradient along the radial direction. The change of flow regime in the Taylor-Couette flow was studied by increasing the Reynolds number. The results showed that: as Gr is increased in helical vortex flow regime, the vortices with the same direction of convection flow increased in size, and the vortex moving velocity also increased. It is also shown that the presence of temperature gradient obviously increased the flow instability when the Richardson number is larger than 0.0045.
Visualization Study on Kinematics of Bubble Motion in a Water Filled Cylindrical Tank
Kim, Sang-Moon ; Jeong, Won-Taek ; Kim, Kyung-Chun ;
Journal of the Korean Society of Visualization, volume 8, issue 3, 2010, Pages 41~48
DOI : 10.5407/JKSV.2010.8.3.041
A visualization study to evaluate bubble motion in a tab water filled cylindrical tank with a varying flow rate of compressed air is conducted. The flow rate of compressed air varies from 1 to 5 L/min. Time resolved images are acquired by a high speed camera in 10 bit gray level at 100 fps and the measurement volume is irradiated by a 230 W halogen lamp. It is observed that there are three different regions; the bubble formation region, the rising bubble region and the free surface region. During the rise of bubble, the shape is changed as if an elastic body. Based on the binarized bubble image, the mean diameters of rising bubbles are estimated at beneath of the free surface. As the gas flow rate increases, the mean diameter is increased and the rising velocity also increases with buoyancy force.
Analysis of Flow Distribution for Laser Printer Using PIV Technique
Kim, Seung-Bae ; Lee, Soo-Hong ; Kim, Tae-Kyu ; Lee, Ho-Ryul ; Ko, Han-Seo ;
Journal of the Korean Society of Visualization, volume 8, issue 3, 2010, Pages 49~55
DOI : 10.5407/JKSV.2010.8.3.049
Thermal flows inside a laser printer are affected by generated heat from a fuser and boards. Thus, the effect of fans has been investigated to control the thermal flows and behaviors of toners. In order to analyze the phenomena experimentally, a PIV (Particle Image Velocimetry) has been used, and then the flow inside the printer has been predicted by the CFD (Computational Fluid Dynamics) in this study to determine the efficient flow distribution by an optimum design of the printer. The determined optimum design has been confirmed by the developed PIV technique so that the efficiency of the laser printer can be improved by the proposed design.
Experimental and Computational Studies of FSS-RSS Phenomena in an Over-Expanded Nozzle
Lee, Jong-Sung ; Kim, Heuy-Dong ;
Journal of the Korean Society of Visualization, volume 8, issue 3, 2010, Pages 56~62
DOI : 10.5407/JKSV.2010.8.3.056
The interaction patterns between shock wave and boundary layer in a rocket nozzle are mainly classified into two categories, FSS(Free Shock Separation) and RSS(Restricted Shock Separation), both of which are associated with the thrust characteristics as well as side loads of the engine. According to the previous investigations, strong side loads of the engine are produced during the period of transition from FSS to RSS or vice versa. The present work aims at investigating the unsteady behavior of the separation shock waves in a two-dimensional supersonic nozzle, using experimental method and CFD. Schlieren optical method was employed to visualize the time-mean and time-dependent shock motions in the nozzle. The unsteady, compressible N-S equations with SST K-
turbulence closure were solved using a fully implicit finite volume scheme. The results obtained show the separation shock motions during the transition of the interaction pattern.