Sự dao động mật độ cục bộ trong mô phỏng sắt lỏng

• Ngôn ngữ: vie
• Ký hiệu phân loại: 532.2 Hydrostatics
• Thông tin xuất bản: Tạp chí khoa học (Đại học Sư phạm Hà Nội), 2014
• Mô tả vật lý: 112-118
• Bộ sưu tập: Metadata
• ID: 548875

Tóm tắt

The authors present a result of a molecular dynamics (MD) simulation of liquid iron. A series of MD models containing 104 particles under periodic boundary conditions at temperatures from 290 to 2300 K have been constructed. The authors focus on local density fluctuations (LDFs) which enable the diffusion of iron particles. The authors found that LDFs operate as a diffusion vehicle for Fe particles. The diffusion coefficient is found to be a product of the rate of LDF and mean square displacement of Fe particles per LDF. The diffusion is realized by two types of activated LDFs. First type is accompanied by frequent back-and-forth movements of Fe particles. The second type causes the random movement of Fe particles.