Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Multi-scale simulation of drying process fey porous materials using molecular dynamics (part 3: multi-scale simulation)

분자동역학을 이용한 다공성 물질 건조공정 멀티스케일 시뮬레이션(3부: 멀티스케일 시뮬레이션)

  • Baik S.M. (Department of Percision Mechanical Engineering, Graduate School, Hanyang University) ;
  • Keum Y.T. (Division of Mechanical Engineering, Hanyang University)
  • 백성민 (한양대학교 일반대학원 정밀기계공학과) ;
  • 금영탁 (한양대학교 기계공학부)
  • Published : 2005.08.01
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Abstract

In this study, the numerical simulation of drying processes for porous materials is performed by employing the hierarchical multi-scale modeling and the nano-scale material properties obtained from the molecular dynamics simulation. The multi-scale simulation system is set up using pre- and post-processors and the drying process of electric porous ceramic insulator is simulated. The temperature, moisture, residual stress, and displacement distributions are compared with those based on homogenized properties.

건조공정 중인 다공성 물질의 물성은 재료의 비균질성 즉 전위, 입자, 입계, 균열, 기공과 같은 미시적인 결함 인자들의 영향을 받는다. 따라서 다공성 물질의 건조공정을 전산 시뮬레이션하기 위해서는 연속체 스케일과 원자 스케일해석 그리고 스케일별 해석 한계 극복이 요구된다. 본 연구에서는 분자동역학 시뮬레이션으로 계산한 나노스케일 물성를 연속체 스케일 해석에 연계하는 계층적 멀티스케일 시스템을 구축하고, 다공성 세라믹 애자의 건조공정을 전산 시뮬레이션 하였다. 해석 결과, 온도, 습도, 변형률 그리고 응력 분포를 기존의 결과들과 비교하여 검증하였다.

Keywords

References

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