非常稳定的钻石/热油纳米悬浮的实验热容量
Anas Ahmed1, Suhaib Umer Ilyas2, Nawal Noshad3
1Industrial and Systems Engineering Department, University of Jeddah Jeddah 23890 Kingdom of Saudi Arabia.
RSC advances
|February 25, 2025
概括
这项研究研究了基于钻石的热油纳米流体的特定热容量 (SHC). 结果显示,SHC随着温度的增加而增加,但随着纳米粒子度的增加而减少.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 热力学是一种热力学.
背景情况:
- 纳米粒子改变了流体的热物理特性,包括特定热容量 (SHC).
- 现有的纳米流体SHC研究是有限的,并显示了相互矛盾的结果.
- 了解SHC对于纳米流体的热应用至关重要.
研究的目的:
- 实验测量基于钻石的热油纳米流体的SHC.
- 分析纳米粒子度和温度对SHC的影响.
- 开发纳米流体SHC的预测模型.
主要方法:
- 差分扫描热量计 (DSC) 用于SHC测量.
- 钻石纳米颗粒被分散在热油中,度为0.25-1%重量.
- 实验是在35-80°C的温度范围内进行的.
主要成果:
- 纳米流体的SHC随着温度的增加而增加.
- 随着纳米颗粒度的增加,SHC下降,8.25%的减量为1重%.
- 经典模型低估了实验中的SHC值.
结论:
- 基于钻石的热油纳米流体表现出独特的SHC行为.
- 一个新的多变量相关性准确地预测纳米流体SHC (R2=96.35%).
- 拟议的模型解释了经典模型错过的纳米尺度现象.
相关概念视频
Heat Capacities of an Ideal Gas III
2.1K
The number of independent ways a gas molecule can move along straight line, rotate, and vibrate is called its degrees of freedom. Supposing d represents the number of degrees of freedom of an ideal gas, the molar heat capacity at constant volume of an ideal gas in terms of d is
2.1K
Quantifying Heat
53.8K
Thermal Energy
53.8K
Temperature and Thermal Equilibrium
6.5K
Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
6.5K
Heat Capacity: Problem-Solving
477
The heat capacity of a gas is the amount of heat energy required to raise the temperature of a unit mass of gas by one degree Celsius. It is an important thermodynamic property of gases, and its determination is essential in many industrial and scientific applications. Here are the steps to solve problems related to the heat capacities of gases:
Determine the type of gas: The heat capacity of a gas depends on its molecular structure and the degree of freedom of its molecules. Different types of...
Determine the type of gas: The heat capacity of a gas depends on its molecular structure and the degree of freedom of its molecules. Different types of...
477
Heat Capacities of an Ideal Gas II
2.3K
For a system that undergoes a thermodynamic process at a constant volume condition, the heat absorbed is used only to increase the system's internal energy and not for doing any kind of work. While for a system undergoing a thermodynamic process under a constant pressure condition, the amount of heat absorbed is used not only for increasing the internal energy (as a function of temperature) but also for doing some work. The molar heat capacity is the amount of heat required to increase the...
2.3K
Heat Capacities of an Ideal Gas I
2.6K
Heat capacity is the ratio of heat absorbed by the substance corresponding to its temperature change. It is also called thermal capacity and the SI unit of heat capacity is J/K. Whereas, specific heat capacity is defined as the amount of heat necessary to change the temperature of 1 kg of a substance by 1 K and is also called massic heat capacity. Its SI unit is J/kg⋅K.
Molar heat capacity quantifies the ratio of the amount of heat added (or removed) to increase (or decrease) the...
Molar heat capacity quantifies the ratio of the amount of heat added (or removed) to increase (or decrease) the...
2.6K


