About

Our laboratory is addressing technical challenges in nuclear systems & safety using advanced modeling, high-fidelity experiment, and innovative design empowered by high performance computing.

Prof. Eung Soo Kim, Head of High Performance Computing Group for Nuclear Systems & Safety at Seoul National University

ESLAB at SNU advances technology in modeling & simulation by which scientists and engineers find new ways to tackle nuclear systems & safety challenges—challenges that cannot be addressed through traditional method alone. High Performance Computing (HPC) enables unprecedented large-scale numerical models for studying and simulating complex multi-physics problems in nuclear systems & safety that would otherwise be too expensive, too dangerous, or even impossible to study by direct experimentation.

With state-of-the-art computational modeling and predictive simulation capabilities, HPC reduces the risks and uncertainty that are often barriers to industry adopting new and innovative technologies. Our research efforts enable to save time and money and to significantly improve the breakthroughs and useful advances. Incorporating these capabilities, therefore, innovate nuclear systems & safety in efficiency, effectiveness, and reliability across all the activities including design, manufacturing, regulation, and policy making.

Advanced Modeling & Simulation

 

High Performance Computing

 

High Fidelity Experimentation

 

Members

 

Professor

Prof. Eung Soo Kim

· 2016  ~                        Associate Professor, Seoul National University, South Korea
· 2012  ~ 2015           Assistant Professor, Seoul National University, South Korea
· 2009 ~ 2011            Staff Scientist/Engineer, Idaho National Laboratory, USA
· 2006 ~ 2009            Postdoc, Idaho National Laboratory, USA
· 2006                             Postdoc, KAIST, South Korea
· 2006                             Ph.D., KAIST, South Korea



Postoctoral Researchers

Young Beom Jo, Ph.D

paul406@snu.ac.kr
#SPH, #DEM. #Multi-phase,
#Severe Accident, #Granular Micro Reactor



Ph.D Students

Hae Yoon Choi

chy7452@snu.ac.kr
#SPH, #High Accuracy, #Correction,
#Jet Fragmentation, #Rigid Body

Tae Soo Choi

bbada3290@snu.ac.kr
#SPH, #Gas, #Turbulence

So Hyun Park

bibirom10@snu.ac.kr
#SPH, #Natural Convection, #IVR, 
#MARS, #Coupling

Soo San Park

michle11@snu.ac.kr
#SPH, #MHD, #Pinch Plasma, #Granular Micro Reactor

Jin Hyun Kim

uhaha118@snu.ac.kr
#SPH, #ASPH, 
#Shockwave, #Explosion, #Granular Micro Reactor

Yelyn Ahn

zks1124@snu.ac.kr
#SPH, #Bubble Dynamics, 
#Phase-Field-Model, #HPC, #GPU

Hee Sang Yoo

yhs0365@snu.ac.kr
#SPH, #Surface Tension, #Microfluidics, #ALE, #Axisymmetric

Tae Hoon Lee

zrkanl0521@snu.ac.kr
#SPH, #Structure, #FSI, #GIS, #Evacuation, #ABM

Hoon Chae

georgechae@snu.ac.kr
#SPH, #DEM, #Boiling, 
#Non-spherical, #Granular Micro Reactor

Jin Woo Kim

wlsdn1362@snu.ac.kr
#SPH, #Gas, #Reaction,
#Boundary Condition, #Granular Micro Reactor



MS Students

Jun Sung Choi

cjs8088@snu.ac.kr
#Flow Visualization, #Machine Learning,
#PIV, #AI-SPH

Ju Ryong Park

itts9904@snu.ac.kr
#SPH, #Implicit, #GUI, #GIS, #ABM, #Evacuation

Do Hyun Kim

hyen0929@snu.ac.kr
#SPH, #Particle Split/Merge,
#Multi-resolution, #Evacuation, #GIS

Taehwan Kim

hwan0713@snu.ac.kr
#Machine Learning, #SPH



Alumni

Min Young Park (Ph.D)

Korea Atomic Energy Research Institute (KAERI)
Senior Researcher

Min Seop Song (Ph.D)

Idaho National Laboratory,  USA
(INL)
Postdoctoral Researcher

Min Young Park (Ph.D)

Seoul National University
(SNU)
Postdoctoral Researcher

Jae Soon Kim (Ph.D)

Seoul National University, Korea
(SNU)
Postdoctoral Researcher

Serin Shin (M.S)

Korea Atomic Energy Research Institute (KAERI)
Researcher

Ji Hyun Seong (M.S)

Massachusetts Institute of Technology, USA
(MIT)
Ph.D Candidate

Dokyun Lim (M.S)

Korea Institute of Nuclear Safety, Korea
(KINS)
Staff Engineer






Researches

 

ADVANCED MODELING & HIGH PERFORMANCE COMPUTING

High Performance Computing (HPC) enables unprecedented large-scale numerical models for studying and simulating complex multi-physics problems in nuclear systems & safety that would otherwise be too expensive, too dangerous, or even impossible to study by direct experimentation. Incorporating these capabilities can innovate nuclear systems & safety in efficiency, effectiveness, and reliability across all the activities from design & manufacturing to regulation & policy making.

Multiple Rigid-Body Simulation with SPH Fluid Flow in GPU Framework 

Hae-Yoon Choi (2020)

#SPH #Rigid Body #Coupling #GPU #Fluid Flow 

ABS-GIS Platform for Evacuation in Nuclear Disaster

Joo-Ryong Park (2020)

#GIS #MATSIM #HYSIS #Evacuation #MESH #Nuclear #Disaster

GIS Visualization

Do-Hyun Kim (2020)

#GIS #Blender #Evacuation #3 Dim #Dispersion #Geographic

Jamming Probability 

Su-San Park (2020)

#DEM #Jamming #Probability #Boron-free #Secondary Shutdown System

LMR Centralized Sloshing

Young Beom Jo (2019)

#SPH #LMR #Safety #Nuclear #Sloshing #GPU #Severe Accident

IVR-ERVC Simulation

So Hyun Park (2020)

#SPH #LWR #Severe Accident #IVR #ERVC #Natural Convection #MARS

Thermal Ablation Simulation

Eung Soo Kim (2017)

#SPH #LWR # Severe Accident #Thermal Ablation #MCCI #Multi-Fluid

Jet Break-up Simulation in FCI

So-Hyun Park (2019)

#SPH #Jet Breakup #FCI #LWR #Severe Accident #Fragmentation #Multi-GPU

Gas Combustion

Jin Woo Kim (2020)

#SPH #Gas #Multi-Component #Combustion #Split #Open Boundary

Melt Jet Ejection Simulation

Hoon Chae (2020)

#SPH #FCI #LWR #Severe Accident #Melt Jet Relocation

Resitive MHD Plasma Simulation

Su-San Park (2020)

#SPH #Magnetohydrodynamics #Plasma #Pinch #ASPH

Self Leveling Simulation

Young Beom Jo (2020)

#SPH #DEM #Coupling #Self-Leveling #Multi-phase #LWR #Severe Accident

Water Entry Projectile Simulation

Hee Sang Yoo (2020)

#SPH #PFSPH #Surface Tension #Water Entry #Contact Angle #Cavity

Fluid Structure Interaction (FSI)

Tae Hoon Lee (2020)

#SPH #Fluid Structure Interaction #FSI #Elastic #Coupling

Bubble Lift Force in Shear Flow

Yerlyn Ann (2019)

#SPH #Two Phase #Lift Force #Open Boundary #Linear Shear Flow

Self Propelled Droplet Jumping

Hee Sang Yoo (2020)

#SPH #Droplet #Surface Tension #Wettability #Self-Propelled Jumping

Under-Water Explosion

Jin Hyun Kim (2020)

#SPH #ASPH #Shockwave #Underwater Explosion #Safety

Eulerian-Lagrangian SPH

Hee Sang Yoo (2020)

#SPH #Eulerian #Lagrangian #ALE #WCSPH #Shifting

High Performance Computing

So-Hyun Park et al. (2019)

#SPH #High Performance Computing #HPC #Multi-GPU #Parallelization

Machine Learning (ML) for SPH

Joon Sung Choi et al. (2020)

#SPH #AI #Machine Learning #Interpolation

CFD Simulation for SFR Core

Min-Seop Song (2019)

#CFD #ANSYS-CFX #SFR #Turbulence #Wire-wrap

Simulation Gallery

MESH (MATSIM Evacuation Simulation Coupled with HYSPLIT) Platform - Developed by Joo Ryong Park (2020)

MATSIM Evacuation Simulation in Seoul National University Area - Simulated by Do Hyun Kim (2020)

Multi-Rigid Body coupled with SPH in GPU framework - Simulated by Hae Yoon Choi (2020)

CH4 combustion simulation using SPH - Simulated by Jin Woo Park (2020)

Eulerian-Lagrangian mixed simulation using SPH - Simulated by Hee Sang Yoo (2020)

Natural convection simulation with multiple layers: SPH-MARS coupling - Simulated by So Hyun Park (2020)

3-phase SPH-DEM coupling with open boundary - Simulated by Young Beom Jo (2020)

Water entry projectile simulation for different wettability using SPH  - Simulated by Hee Sang Yoo (2020)

Natural convection with mass diffusion - Simulated by Eung Soo Kim (2018)

Liquid-gas-particle interactions (fluid: SPH, debris:DEM) - Simulated by Young Beom Jo (2020)

Fluid & solid particle interactions (fluid: SPH, particle: DEM) - Simulated by Young Beom Jo (2020)

Fluid & solid interactions (fluid: SPH, particle: DEM) - Simulated by Young Beom Jo (2020)

Fuel coolant interactions (FCI) with air entrapment - Simulated by So Hyun Park (2019)

LMR molten core sloshing behavior in structures - Simulated by Young Beom Jo (2019)

Bubble trajectories in linear shear flow - Simulated by Yelyn Ahn (2019)

Melt jet ejection in solid structures - Simulated by Hoon Chae (2020)

Underwater Explosion - Simulated by Jin Hyun Kim (2020)

Particle split/merge - Simulated by Do Hyun Kim (2020)

Double diffusive convection - Simulated by So Hyun Park (2019)

Solid particle piling behavior in square hopper (DEM) - Simulated by Young Beom Jo (2019)

SLAB detonation & shock propagation - Simulated by Su-San Park (2019)

Water entry of a solid sphere with hydrophobic surface - Simulated by Hee Sang Yoo (2019)

Structural analysis using SPH - Simulated by Tae Hoon Lee (2019)

Vorticity field of von Karman vortex street behind a circular cylinder at Re=200 - Simulated by Jin Woo Kim (2019)

Thermal ablation & melting by heating source - Simulated by Eung Soo Kim (2017)

Water entry of a solid sphere with non-uniform wettability - Simulated by Hee Sang Yoo (2020)

Pinch plasma with resistive magnetohydrodynamics (MHD) - Simulated by Su San Park (2019)

Self-propelled jumping droplets - Simulated by Hee Sang Yoo (2020)

Capillary force & dynamic contact angle by IPF-based model - Simulated by Hee Sang Yoo (2019)

Fluid behaviors in various viscosities - Simulated by Juryong Park (2020)

Billiard shots - Simulated by Young Beom Jo (2020)

Corium melt spreading with heat transfer & solidification - Simulated by Hae Yoon Choi (2019)

Wave propagation & free surface (ISPH) - Simulated by So Hyun Park (2017)

Fluid structure interaction (SPH) - Simulated by Tae Hoon Lee (2020)

Flow in density gradient with diffusion (SPH) - Simulated by Eung Soo Kim (2018)

Rising bubble in different Re numbers (SPH) - Simulated by So Hyun Park (2020)

HIGH FIDELITY EXPERIMENTATION

In recent years, the high-fidelity experimentation became a critical tool for verification & validation of advanced computational methods in nuclear systems and safety. Flow visualization is an experimental technique that visualizes flow fields & structures, which enables to analyzes their characteristics. We use laser-based flow visualization techniques such as PIV, PLIF, etc with advancing the state-of-the-art measurement techniques. 

Comparisons between CFD Simulation and Experimental Data

Min Seop Song (2019)

#PIV #MIR #PLIF #SFR #Core #Wire-wrap #CFD #Validation #Local Velocity

Flow Visualization in SFR Core Geometry 

Min Seop Song (2019)

#PIV #MIR #PLIF #SFR #Core #Wire-wrap #CFD #Validation

Refractive Index Matching (RIM)-PIV-PLIF Combination 

Min Seop Song (2019)

#PIV #MIR #PLIF #SFR #Core #Wire-wrap #CFD #Validation

Flow Visualization Experimental Facility based on PIV/PLIF 

Min Seop Song (2019)

#PIV #MIR #PIV #PLIF #SFR #Core #Wire-wrap #CFD #Validation

High Resolution PIV using Optical Flow Analysis

Ji Hyun Seong (2020)

#PIV #High Resolution #Optical Flow #Benchmark #Jet #Real Images

High Resolution PIV using Optical Flow Analysis

Ji Hyun Seong (2020)

#PIV #High Resolution #Optical Flow #DNS #Synthetic Images

Deep Learning for PIV

Joon Sung Choi (2020)

#PIV #Visualization #Robust #Machine Learning

Refractive Index Matching for 3-D Printing 

Min Seop Song (2016)

#PIV #MIR #Rapid Prototyping #3-D Printing #Anise Oil

Vortex Visualization for SFR Core Geometry

Min Seop Song (2019)

#CFD #SFR #Core #Geometry #Wire-wrap #Vortex #Identification

Publications





Choi, H. Y., Chae, H., and Kim, E.S.*, Numerical Simulation on Jet Breakup in the Fuel-Coolant Interaction Using Smoothed Particle Hydrodynamics, Nuclear Engineering and Technology, 2020 (under review).

Yoo, H. S., and Kim, E.S.*, Numerical Analysis on Water Entry of Spherical Projectiles with Various Wettability using Smoothed Particle Hydrodynamics, Ocean Engineering, 2020 (under review).

Park, S.S., Kim, J.H., Park, S.H., and Kim, E.S., SPH Simulation for Pinch Plasma using Non-ideal Resistive MHD Model, TBD, 2020 (in preparation).

An, Y.R., Jo, Y.B., Park, S.H., Kim, J.W., Kim, E.S.*, Modeling Bubble Lifting Behavior in Linear Shear Flow using Smoothed Particle Hydrodynamics, International Journal of Multi-phase Flow, 2020 (in preparation).

Jo, Y.B., Park, S.H., Kim, E.S., Simulation of Vapor Induced 3-Phase Sloshing Behavior using Multi-phase SPH-DEM Coupling, TBD, 2020 (in preparation).

Park, S.H., Chae, H., Jo, Y.B., Kim, E.S.*, Weakly Compressible Smoothed Particle Hydrodynamics for General Gradient Driven Flow, TBD, 2020 (in preparation).

Song, M.S., Jeong, J.H., Kim, E.S.*, CFD Analysis on 19-pin and 32-pin KAERI SFR Wire-wrapped Fuel Bundle Hydraulic Experiments, Nuclear Engineering and Design, 2020 (Accepted).

Jo, Y.B, Park, J.R., Kim, E.S.*, Numerical simulation on LMR molten-core centralized sloshing benchmark experiment using multi-phase smoothed particle hydrodynamics, Nuclear Engineering and Technology, 2020. (https://doi.org/10.1016/j.net.2020.07.039)

Park, S.S., Kim, E.S.*, Jamming probability of granular flow in 3D hopper for non-Janssen saturation regime: DEM analysis, Granular Matter, Vol. 77, 2020. (10.1007/s10035-020-01050-w)

Park, S.H., Jo, Y.B., Kim, E.S.*, Development of Multi-GPU-Based Smoothed Particle Hydrodynamics Code for Nuclear Thermal-hydraulics and Safety: Potential and Challenges, Frontiers in Energy Research, Vol. 8,  2020. (https://doi.org/10.3389/fenrg.2020.00086)

Song, M.S., J.H., Jeong, Kim, E.S.*, Flow visualization on SFR wire-wrapped 19-pin bundle geometry using MIR-PIV-PLIF and comparisons with RANS-based CFD Analysis, Annals of Nuclear Energy, Vol. 147, 2020.(https://doi.org/10.1016/j.anucene.2020.107653)

Seong, J.H., Song, M.S., Nunez, D, Manera, A., Kim, E.S.*, Velocity Refinement of PIV using Global Optical Flow, Experiments in Fluids, Vo. 60, 2019. (https://link.springer.com/article/10.1007/s00348-019-2820-4)

Yoo, H.S., Kim, E.S.*, Heat transfer enhancement in dry cask storage for nuclear spent fuel using additive high density inert gas, Annals of Nuclear Energy, Vol. 132, pp. 108-118, 2019. (https://doi.org/10.1016/j.anucene.2019.04.018)

Lim, D.K., Kim, E.S.*, Song, M.S., Chae, H., Topology Optimization on Vortex-type Passive Fludic Diode for Advanced Nuclear Reactors, Nuclear Engineering and Technology, Vol. 51, 2019. (https://doi.org/10.1016/j.net.2019.03.018)

Song, M.S., Jeong, J.H., Kim, E.S.*, Numerical Investigation on Vortex Behavior in Wire-wrapped Fuel Assembly for Sodium Fast Reactor, Nuclear Engineering and Technology, Vol. 51, pp 665-675, 2019. (https://doi.org/10.1016/j.net.2018.12.012)

Jo, Y.B., Park, S.H., Choi, H.Y., Jung, H.W., Kim, Y.J., Kim, E.S.*, SOPHIA: Development of Lagrangian-based CFD Code for Nuclear Thermal-Hydraulics and Safety Applications, Annals of Nuclear  Energy, Vol. 124, pp. 132-149, 2019. (https://doi.org/10.1016/j.anucene.2018.09.005)

Park, S.H., Choi, T.S., Choi, H.Y., Jo, Y.B., Kim, E.S.*, Simulation of a Laboratory-scale Experiment for Wave Propagation and Interaction with a Structure of Undersea Topography near a Nuclear Power Plant using a Divergence-Free SPH, Annals of Nuclear Energy, Vol. 122, pp. 340-351, 2018. (https://doi.org/10.1016/j.anucene.2018.08.045)

Park, M.Y., Kim, E.S.*, Analysis of tritium behaviors on VHTR and forward osmosis integration system, Nuclear Engineering and Design, Vol. 338, pp. 34-51, 2018. (https://doi.org/10.1016/j.nucengdes.2018.07.030)

Shin, S.R., Jeong, J.H., Lim, D.K., Kim, E.S.*, Design of SFR fluidic diode axial port using topology optimization, Nuclear Engineering and Design, Vol. 338, pp. 63-73, 2018. (https://doi.org/10.1016/j.nucengdes.2018.07.028)

Lim, D.K., Park, Y.J., Kim, H.D., Kim, E.S.*,CFD-based shape optimization on cross-section of monoblock fusion divertor cooling channel for minimizing local heat flux, Fusion Engineering and Design, Vol. 136, pp. 1100-1105, 2018. (https://doi.org/10.1016/j.fusengdes.2018.04.077)

Ham, T.K., D.J., Arcilesi, I.H., Kim, Sun, Xiaodong, Christensen, R.N., Oh, C.H., Kim, E.S., Computational fluid dynamics analysis of the initial stages of a VHTR air-ingress accident using a scaled-down model, Nuclear Engineering and Design, Vol. 300, pp. 517-529, 2016. (https://doi.org/10.1016/j.nucengdes.2016.02.011)

Song, M.S., Park, S.H., Kim, E.S.*, Particle image velocimetry measurement of 2-dimensional velocity field around twisted tape, Fusion Engineering and Design, Vol. 109, pp. 596-601, 2016. (https://doi.org/10.1016/j.fusengdes.2016.02.039)

Park, M.Y., Song, M.S., Kim, E.S.*, Development of tritium permeation model for printed circuit heat exchanger, Annals of Nuclear Energy, Vol. 98, pp. 166-177, 2016. (https://doi.org/10.1016/j.anucene.2016.08.001)

Kim, J.S., Kim, B.J., Kim, E.S.*, Oh, C.H., Experimental Study on Fundamental Phenomena in HTGR Small Break Air-Ingress Accident, Annals of Nuclear Energy,Vol. 87, pp. 145-156, 2016. (https://doi.org/10.1016/j.anucene.2015.08.012)

Lee, Y.G., Park, I.W., Park, G.C., Kim, E.S*, and Lee, D.W, Reduction of Circulation Power for Helium-Cooled Fusion Reactor Blanket using Additive CO2 gas, Fusion Engineering and Design, Vol. 100, pp. 436-442, 2015.

Park, M.Y., Shin, S.R., Kim, E.S.*, Effective Energy Management by Combining Gas Turbine Cycles and Forward Osmosis Desalization Process, Applied Energy, Vol. 154, pp. 51-61, 2015.

Park, M.Y., Kim, E.S.*, Development of semi-empirical model for tritium permeation under non-uniform temperature distribution at heat exchanger tube wall, Annals of Nuclear Energy, Vol. 75, pp. 413-420, 2015.

Song, M.S. Choi, H.Y., Sung, J.H., Kim, E.S*., Matching index of refraction of transparent 3D printing models for flow visualization, Nuclear Engineering and Design, Vol. 284, pp. 185-191, 2015.

Park, M.Y., and Kim, E.S.*, Thermodynamic Evaluation on the Integrated System of VHTR and Forward Osmosis Desalination Process, Desalination, vo. 337, pp. 117-126, 2014.

Yoon, S.J., Kim, E.S., and Sabharwall, P., Numerical Study on Crossflow Printed Circuit Heat Exchanger for Advanced Small Modular Reactor, International Journal of Heat and Mass Transfer, vol. 70, pp. 250-263, 2013.

Chang H. Oh, Eung Soo Kim, Isothermal Air-Ingress Validation Experiments, Nuclear Technology, Vol. 181, pp. 68-80 (Recommended for Publication in Nuclear Technology from NURETH-14), 2013.

Su-Jong Yoon, Min-Seup Song, Il-Woong Park, Goon-Cherl Park, and Eung Soo Kim*, Assessment of COMSOL Capability to Analyze Thermal-Hydraulic Characteristic of Korean Helium Cooled Test Blanket, SOFA, Fusion Engineering and Design, Vol. 88, pp. 2240-2243, 2013.

Jeong-Hun Lee, Su-Jong Yoon, Eung Soo Kim, and Goon-Cherl Park, CFD Analysis and Assessment for Cross Flow Phenomena in VHTR Prismatic Core, Heat Transfer Enginnering, vol. 35, pp. 11-12, 2014.

Piyush Sabharwall, Eung Soo Kim, Mike Patterson, Evaluation Methodology for Advance Heat Exchanger Concepts Using Analytical Hierachy Process, Nuclear Engineering and Design, Vol. 248, pp. 108-116, 2012.

Chang H. Oh, Eung S. Kim, Conceptual Study on Air Ingress Mitigation for VHTRs,  Nuclear Engineering & Deisgn, Vol. 250, pp. 448-464, 2012.

Chang H. OH, Eung S. Kim, Natural Circulation Patterns in the VHTR Air-ingress Accident and Related Issues, Nuclear Engineering Design, Vol. 249, pp. 228-236, 2012.

Contact

You may reach us via web form, or contact us by direct e-mail at
snueslab@gmail.com

ADDRESS

Room 209, Building 31, Seoul National University
1, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea

TELEPHONE

+82-2-880-7216

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