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김일수,김학형,조선영,강봉용,강문진,유관종 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
Over the last few years, there has been a growing interest in quantitative representation of the weld pools in order to relate the processing conditions to the driving forces of the weldment produced and to use this information for the optimization of the welding process. A theoretical model offers a powerful alternative to check the physical concepts of the welding process and the effects of driving forces. To solve this problem, a 2-D thermo-fluid model were developed for determining temperature and velocity distribution for the GMA welding process.
Separation of Particles by DC-Dielectrophoresis in Microchannels
Kwan Hyoung Kang(강관형),Dongqing Li 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
In electrokinetic transport of liquid and particles, the dielectrophoretic (DEP) force is also generated inside microchannels by the non-uniform DC electric field formed near an obstacle. The DEP force is proportional to the volume of particles; hence, it can be utilized to separate particles having different sizes. It is shown, for a simple straight channel having a rectangular obstacle, that a particle path is greatly affected near the edge of the block due to the DEP force. The trajectory of particles are predicted numerically, which shows a fairly good agreement to experimental results. The method is applied to separate two different sizes of particles in a channel network.
Recent Progress in Electrofluidics
Kwan Hyoung Kang(강관형) 한국가시화정보학회 2010 한국가시화정보학회 학술발표대회 논문집 Vol.2010 No.4
Addition of polar additives to a dielectric liquid greatly increases the electrical conductivity. The conductivity is field dependent due to Onsager effect. Non-uniform field induces a non-uniform conductivity distribution. Non-uniform conductivity distribution generates free charge in an electric field (Maxwell-Wagner polarization). Our theoretical model predicts the flow fields and scaling behaviors fairly well.
Separation of Particles by DC-Dielectrophoresis in Microchannels
Kwan Hyoung Kang(강관형),Dongqing Li 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
In electrokinetic transport of liquid and particles, the dielectrophoretic (DEP) force is also generated inside microchannels by the non-uniform DC electric field formed near an obstacle. The DEP force is proportional to the volume of particles; hence, it can be utilized to separate particles having different sizes. It is shown, for a simple straight channel having a rectangular obstacle, that a particle path is greatly affected near the edge of the block due to the DEP force. The trajectory of particles are predicted numerically, which shows a fairly good agreement to experimental results The method is applied to separate two different sizes of particles in a channel network.
Interface Deformation and the Lippmann-Young Equation in Electrowetting
Kwan Hyoung Kang(강관형) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
In electrokinetic transport of liquid and particles, the dielectrophoretic (DEP) force is also generated inside microchannels by the non-uniform DC electric field formed near an obstacle. The DEP force is proportional to the volume of particles; hence, it can be utilized to separate particles having different sizes. It is shown, for a simple straight channel having a rectangular obstacle, that a particle path is greatly affected near the edge of the block due to the DEP force. The trajectory of particles is predicted numerically, which shows a fairly good agreement to experimental results. The method is applied to separate two different sizes of particles in a channel network.