• Journal of the Korean Society of Combustion
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• v.15 no.3
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• pp.67-73
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• 2010

The temperature distribution of diesel particulate filter with five partitioned electric heaters is numerically analyzed to investigate the condition of regenerating ceramic filter. The commercial code STAR-$CCM+^{(R)}$ is utilized to simulate multi-dimensional steady hot air flow in DPF. In order to verify the computational results, thermocouples are used to measure the temperature distribution in DPF. Computational results agree well with experimental ones. The results show that the maximum temperature in DPF is lowered as the mass flow rate of exhaust gas increases, which means that the more power in heater will be necessary as the engine speed increases. Compared with heater placed at center, heater at circumference has the higher maximum temperature in DPF. The maldistribution of flow field in front of heater has the main influence on the temperature distribution in DPF.

• Journal of Advanced Research in Ocean Engineering
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• v.2 no.2
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• pp.61-66
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• 2016

This study presents the wave run-up height and depression depth around offshore cylindrical structures according to the wave period. The present study employs the volume of fluid method with the realizable turbulence model based on a commercial computational fluid dynamics software called the "STAR-CCM+" to simulate a 3D incompressible viscous two-phase turbulent flow. The present results for the wave run-up height and depression depth with regard to the wave period are compared with those of the relevant previous experimental and numerical studies.

• Journal of computational fluids engineering
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• v.21 no.1
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• pp.72-77
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• 2016

In this study, effects of thurster axis tilting angle on the thruster-hull interaction and propulsion performance in a dynamic positioning system of offshore plant are numerically investigated. Straight and 7-degree tilted downward thruster models as a form of ducted propeller are considered. For numerical simulations, Reynolds averaged Navier-Stokes equations with SST turbulence model are solved by using STAR-CCM+. Results show that thruster-hull interaction is reduced in 7-degree tilted thruster model with lower vortex strength between thruster and hull bottom, although the propulsion performance does not have noticeable difference in a bollard condition.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.1361-1366
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• 2009

This study is to see the internal flow for the plasma cutting fume collector. Plasma cutters are widely used in the canning industry and Fume cause the device because it will affect the performance of the design of dust collector. Therefore, to determine the distribution of the internal flow using CFD and Solver was used for calculated with commercial CFD code STAR-CCM+. The results show that design of chamber was incorrect after passed the filter for exhaust to the fan. And the location of the duct to the influx of dust collector and the design was incorrect. In addition, an array of filter was also inappropriate. As a result, present fume collector need to improvement.

• 한국전산유체공학회:학술대회논문집
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• 2011.05a
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• pp.135-140
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• 2011

The battery pack, a main component of NEV(Neighborhood Electric Vehicle), needs cooling system when it is charging or discharging to prevent the degradation of the battery charging efficiency. The purpose of this study is to analyse the effects of cooling methods, changing positions of inlet and outlet and changing area ratios of inlet and outlet. It has been observed that in the point of uniform cooling suction from the exit side is more efficient than blowing from the inlet. And there is a suitable inlet/outlet area ratio in maximizing the mass flow rate. The numerical analyse using a commercial code STAR-CCM+ version 4.02 were used for the study.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2012.06a
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• pp.125-126
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• 2012

The key issues for the reduction technologies of the exhaust gas from diesel engine being developed are to reduce particulate matters and NOx. Performance of NOx removal in SCR process depends on such various factors as catalyst factors(catalyst composition, shape, velocity, etc.), exhaust gas temperature and velocity distribution. In this study checked flow uniformity with the flow characteristics in the SCR reactor by using STAR CCM+. The pressure drop of experiment and simulation had similar result more than 90% at catalytic Cell. Also, flow uniformity calculated about 0.9036 ant 1st catalytic ind SCR reactor.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2012.10a
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• pp.815-817
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• 2012

• International Journal of Naval Architecture and Ocean Engineering
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• v.9 no.5
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• pp.537-551
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• 2017

In this paper, a two-phase flow solver $HiFoam^{(R)}$ has been developed based on the $OpenFOAM^{(R)}$ to predict resistance of a ship in calm water. The VOF method of $OpenFOAM^{(R)}$ was reviewed and a simple flux limiter was introduced to enhance the robustness of the solver. The procedure for predicting ship motion was modified by introducing Quasi-Steady Fluid-Body Interaction (QS-FBI) with least square regression to improve the efficiency. Other minor factors were considered as well in terms of the efficiency and robustness. The HiFoam was applied to KCS and JBC simulations to validate its efficiency and accuracy by comparing the results to experimental data and STAR-CCM+. The $HiFoam^{(R)}$ was also applied to various ships and it showed good agreements to the experimental data.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.216-217
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• 2018

소형 활주선의 경우, 대형 저속선 대비 항주자세의 변화가 크기 때문에 CFD 해석시 저항성능과 운동성능 결과에 오차가 발생할 수 있다. 본 연구에서는 Warped 2 선형을 대상으로 상용 CFD 코드인 STAR-CCM+ v9.04를 사용한 CFD해석을 수행하여, 이를 모형시험 결과와 비교하여 오차를 확인하였고, 또한 오차의 원인을 분석했을 때, 선체 하부의 Numerical ventilation 현상과 Spray 영역에 문제가 있다고 판단하였다. 추후 연구에서는 오차 해결 방법으로 VOF Phase replacement 기법과 Spray 영역에 대한 격자 최적화 방법을 연구하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.218-219
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• 2018

쌍동선형은 단동선형에 비해 안정성 및 저항성능이 우수하며 그 형상은 일반적으로 대칭 및 비대칭으로 구분한다. 이러한 쌍동선은 고속으로 운항하는 경우 선체사이의 파랑 중첩현상을 줄이기 위해 주로 비대칭선형을 사용한다. 또한, 중소형선박은 선미터널을 적용하여 추력효율을 향상시킨다. 본 연구에서는 비대칭 고속 쌍동선의 선미터널 입구영역의 경사각 변화에 따른 유체역학적 특성(저항성능, 항주자세, 압력분포)에 대한 수치해석 연구를 수행하였다. 수치해석은 상용프로그램 STAR CCM+를 이용하였다.