5 research outputs found
μ΄μ²λ¦¬ λΆμκΈ°κ° Cu reflowμ λ―ΈμΉλ μν₯
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Όλ¬Έ(μμ¬)--μμΈλνκ΅ λνμ :κΈμ곡νκ³Ό μ¬λ£μ 곡,1998.Maste
Numerical Investigation on Pressure and Temperature based Metal Combustion using Multi Material Analysis Method
νμλ
Όλ¬Έ(μμ¬) -- μμΈλνκ΅λνμ : 곡과λν ν곡μ°μ£Όκ³΅νκ³Ό, 2022.2. μ¬μ¬μ΅.λ³Έ μ°κ΅¬μμλ κΈμμ λ€λ ν¨μ ν κ³ μλμ§ λ¬Όμ§μ μλ ₯ κΈ°λ° μ°μ λ° μ¨λ κΈ°λ° μ°μλ₯Ό μμΉμ μΌλ‘ ν΄μνμλ€. κΈμμ΄ κ°μ§λ λμ μλμ§ λ°λ λ° κ³ μλμ§ λ¬Όμ§ λ΄μμ κ°μ§λ νμ°μ ν¨κ³Ό, λ±μΌλ‘ μΈν΄ μ¬λ¬ λΆμΌμμ κΈμμ΄ νλ°ν μ΄μ©λκ³ μλ€. λ³Έ λ
Όλ¬Έμμλ κΈμμ μ°μ λ°μμμ μλ ₯ κΈ°λ°κ³Ό μ¨λ κΈ°λ°μ λ κ°μ§λ‘ λλμ΄ κ°κ° Ignition & Growth λͺ¨λΈ, μλ λμ°μ€ λͺ¨λΈμ μ μ©νμλ€. κ°κ°μ λν΄μ κΈμμ 첨κ°ν κ³ μλ ₯ νμ½μ νμ μμΈ‘, κ³ μ²΄ μΆμ§μ μ μ©μ΅μΈ΅(Melt layer)μμμ ꡬ쑰μ , μ΄μ κ±°λ λͺ¨μ¬λ₯Ό μ£Όμ λ‘ μμΉν΄μμ μ§ννλ€. κΈμ, κ³ μ νλ°λ¬Ό, 곡기, λ°μΈλ λ±μ λ€λ¬Όμ§ ν΄μμ μν΄ λ¬Όμ§ κ°μ κ²½κ³λ₯Ό ꡬλΆνλ Level-set method μ Ghost fluid methodκ° μ½λμ μ μ©λμλ€. μλ ₯ κΈ°λ°μ λ°μμμΌλ‘ ν΄μμ μ§νν κ²½μ°, μ°μ λ°©μ μμ μ¬μ©λλ κ³μμ λ°λΌ μ¬λ¬κ°μ§ ννμ κ²°κ³Όλ₯Ό μ»μ μ μμλ€. κΈμ λ° κ³ μλμ§λ¬Όμ§μ ν¨λμ΄λ μ’
λ₯μ λ°λΌ λ°μ λ©μ»€λμ¦μ΄ λ¬λΌμ Έ anaerobic λ°μμ΄ μ°μΈν΄μ§ κ²½μ° μλ ₯ κΈ°λ°μ λ°μμμ μ¬μ©νλλ° νκ³κ° μ‘΄μ¬νμ§λ§ μ μ ν μν©μ μ μ©λλ€λ©΄, λΉκ΅μ κ°λ¨ν λ°©μμΌλ‘ κΈμ μ°μλ₯Ό λͺ¨μ¬ν μ μμ κ²μΌλ‘ κΈ°λλλ€. μ¨λ κΈ°λ°μ λ°μμμΌλ‘ ν΄μμ μ§νν κ²½μ°, κΈμ μ
μ λ°μ μμ±λ¬Ό κ°μ€λ‘ μΈν μ 체μνμ μλ ₯μ μμ±κ³Ό μ
μμ λ³ν μ¬μ΄μ μνΈμμ©μ νμΈν μ μμλ€.In this study, pressure-based combustion and temperature-based combustion of high-energy materials containing large amounts of metals were numerically analyzed. Metal is used in various fields due to their high energy density and after burning effect in high-energy materials. In this paper, Ignition & Growth model and Arrhenius model were applied by dividing the combustion of metal into two types, pressure-based and temperature-based. For multi-material analysis such as metals, classical explosives, air, and binders, the Level-set method and the Ghost fluid method that track the interface between materials were applied to the code. For pressure-based combustion, various types of results were obtained depending on the coefficients used. It is expected that the pressure-based reaction equation coefficient of metals can be found through comparison with experimental results. For temperature-based combustion, the interaction between the hydrodynamic pressure caused by the product gas of the metal particles and the deformation of the particles was confirmed.μ 1 μ₯ μ λ‘ 1
μ 1 μ μ°κ΅¬μ λ°°κ²½ 1
μ 2 μ μ°κ΅¬μ λ΄μ© 2
μ 2 μ₯ μλ ₯ κΈ°λ° μ°μ 4
μ 1 μ μμΉν΄μ κΈ°λ² 4
μ 2 μ νμ΄λλ‘μ½λ κ²μ¦ 7
μ 3 μ μμΉν΄μ κ²°κ³Ό 11
μ 4 μ κ²°λ‘ 16
μ 3 μ₯ μ¨λ κΈ°λ° μ°μ 17
μ 1 μ μμΉν΄μ κΈ°λ² 4
μ 2 μ μμΉν΄μ κ²°κ³Ό 19
μ 3 μ κ²°λ‘ 23μ