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相关概念视频

Mechanisms of Heat Transfer II01:20

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In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
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Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

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Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
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Mechanisms of Heat Transfer I01:14

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Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
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Temperature and Thermal Equilibrium01:11

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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...
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Mechanism of heat transfer01:19

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Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
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Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
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在堵塞乳液中间歇性热对流.

Francesca Pelusi1, Andrea Scagliarini2,3, Mauro Sbragaglia4

  • 1<a href="https://ror.org/00ygy3d85">Istituto per le Applicazioni del Calcolo</a>, CNR-Via Pietro Castellino 111, 80131 Naples, Italy.

Physical review letters
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概括

堵塞乳液中的热传递发生在间歇性"热爆发"中,由产量压力类风湿学驱动. 这导致流化-刚性过渡和最终持续的对流.

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科学领域:

  • 类风病学 类风病学 类风病学
  • 流体动力学 流体动力学
  • 材料科学 材料科学 材料科学

背景情况:

  • 堵塞的乳液在压力下表现出复杂的行为.
  • 了解这种系统中的热传递对于各种应用至关重要.

研究的目的:

  • 为了研究在塞乳液中的热对流与产量压力力学.
  • 阐明热传递的机制及其与乳液动态的关系.

主要方法:

  • 在产应应力塞乳液中分析热对流.
  • 对滴滴尺度动态的统计分析.
  • 流化-刚性过渡的表征.

主要成果:

  • 热传递是间歇性的,以短暂的热爆发和长时间的导电周期为特征.
  • 乳液动力学涉及产量-压力力学和塑性活性之间的相互作用.
  • 在热爆发期间滴滴凝聚会诱导相位逆转,支持持续的对流.

结论:

  • 这项研究揭示了堵塞乳液中间歇性传热机制.
  • 产力压力力学和塑性活动驱动流化-刚性过渡.
  • 通过凝聚的相逆可以导致持续的对流状态.