使用格子博尔兹曼法与明确的热方程的各种材料的三维固化建模
Zheng Dai1, Zhongyi Wang1, Junhao Zhu1
1College of Power and Energy Engineering, <a href="https://ror.org/03x80pn82">Harbin Engineering University</a>, Harbin 150000, China.
Physical review. E
|September 19, 2024
概括
本研究引入了一种新的基于度的模型,用于模拟混合材料中的相变,使用格子博尔兹曼法 (LBM). 该模型准确地捕捉了不同物质之间的热传递,提高了储能应用的模拟精度.
科学领域:
- 计算物理学的计算物理.
- 材料科学是一种材料科学.
- 热力学是一种热力学.
背景情况:
- 基于度的模型的格子博尔兹曼方法 (LBM) 是用于模拟储能材料中的相变的常见方法.
- 现有的模型在混合材料中扎,这是因为在模拟过程中,散分布函数会转移材料属性.
研究的目的:
- 开发一个改进的基于度的LBM模型,用于准确模拟多材料系统中的相变.
- 在模拟不同材料混合物时,解决当前模型中的偏差.
主要方法:
- 构建了一个基于度的新型模型,使用不同材料的各种度分布函数.
- 实现了一个源项,以基于温度依赖的能量变化来建模材料间的热传递,避免直接的热函数传递.
- 通过模拟空气中水滴的固化来验证模型.
主要成果:
- 拟议的模型准确地模拟了混合材料的固化过程.
- 模拟结果与水滴凝固的实验结果非常一致.
- 新方法有效地处理不同材料之间的热传递.
结论:
- 开发的基于度的LBM模型为模拟多材料系统中的相位过渡提供了更准确的方法.
- 这一进步对于精确建模储能材料和其他涉及材料混合的应用至关重要.
相关概念视频
The Born-Haber Cycle
21.7K
Lattice Energy
21.7K
Trends in Lattice Energy: Ion Size and Charge
23.8K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.8K
Aqueous Solutions and Heats of Hydration
14.6K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.6K
Structures of Solids
14.0K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
14.0K
Metallic Solids
18.3K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.3K
Lattice Centering and Coordination Number
9.5K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Types of Unit Cells
Imagine taking a large number of identical...
9.5K


