Seoul National University · Engineering
Professor Eung Soo Kim's research lab specializes in advanced materials and nuclear thermal-hydraulics, focusing on the development of high-performance composite materials for extreme environments and the numerical analysis of complex flow dynamics in nuclear reactor systems. The lab investigates the enhancement of thermal stability and ablation resistance in silicone-based composites through nanofillers like clay, carbon fiber, and silicon carbide, while also advancing computational methods for reactor safety analysis. A key focus is on improving material interfaces via surface functionalization and optimizing reactor fuel bundle designs for enhanced heat transfer and flow mixing.
Figures are computed from collected data and may differ slightly.
The goal of this study was to retrospectively evaluate the clinical outcomes of arthroscopic repair for chronic ankle instability using a bioabsorbable anchor with 2 sutures. We evaluated the results of 28 ankles treated with arthroscopic anterior talofibular ligament repair using bioabsorbable anchors with a FiberWire and TigerWire suture (Arthrex, Inc, Naples, Florida) placed on the fibula from March 2008 to January 2009. Average follow-up was 15.9 months (range, 13-25 months). Patients were e
Abstract Effects of incorporation of clay and carbon fiber (CF) into a high temperature vulcanized (HTV) silicone rubber, i.e., poly(dimethylsiloxane) (PDMS) containing vinyl groups, on its thermal stability and ablation properties were explored through thermogravimetric analyses (TGA) and oxy‐acetylene torch tests. Natural clay, sodium montmorillonite (MMT), was modified with a silane compound bearing tetra sulfide (TS) groups to prepare MMTS 4 : the TS groups may react with the vinyl groups of
Abstract This study examined the effects of the incorporation of carbon fiber (CF) and silicon carbide powder (SCP) into a high temperature vulcanized (HTV) silicone rubber, poly(dimethylsiloxane) (PDMS) containing vinyl groups on the ablation properties using an oxy‐acetylene torch test. The ablation test results showed that CF enhanced the hardness of the char formed on the composite surface during the oxy‐acetylene torch test and was an important factor determining the ablation properties. SC
Abstract Effects of the incorporation of the PAN‐based carbon fiber (CF) into a room temperature vulcanized silicone rubber (RTV), poly(dimethylsiloxane) (PDMS) containing terminal silanol groups, on the thermal stability and mechanical properties were explored. CF was modified with nitric acid to introduce hydroxyl and carboxyl groups on the CF surface. These functional groups were then treated with an isocyanato silane compound, 3‐isocyanatopropyltriethoxysiane (IPTS) to incorporate trialkoxy
The wire-wrapped fuel bundle is an assembly design in a sodium-cooled fast reactor. A wire spacer is used to maintain a constant gap between rods and to enhance the mixing of coolants. The wire makes the flow complicated by creating a sweeping flow and vortex flow. The vortex affects the flow field and heat transfer inside the subchannels. However, studies on vortices in this geometry are limited. The purpose of this research is to investigate the vortex flow created in the wire-wrapped fuel bun
Advanced modeling and analysis are always essential for the development of safe and reliable nuclear systems. Traditionally, the numerical analysis codes used for nuclear thermal hydraulics and safety are mostly based on mesh-based (or grid-based) methods, which are very mature for well-defined and fixed domains, both mathematically and numerically. In support of their robustness and efficiency, they have been well-fit into many nuclear applications for the last several decades. However, the rec
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