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To effectively design high voltage (HV) circuit breakers, the upwind meshfree (UM) scheme which was proposed by Choe et al.  and Park et al.  is tested. The UM scheme is implemented to a simplified model for the HV circuit breaker and showed a robust behavior even in a severe boundary condition. A good shock capturing is shown in the computations and a delicate gas diffusion through a slit is also computed, which is usually difficult to catch. Vector splitting method is employed todoi:10.1143/jjap.45.9247 fatcat:o4kzhu3dc5hxviko67aepiiyq4