I thought that it was very interesting, so I chose a thermal transfer theme. I would like to further study how the heat of two substances interacts via another substance placed between them. I will study how to calculate heat transfer coefficient in one dimensional space. In other words, I only focus on the two temperatures. One is heat, the other is cold, and the other is medium temperature through which heat passes. External factors such as other temperature and time are not used in three-dimensional space.
Radiation: If the temperature of two objects is different and there are distances, the heat transfer between them is called radiative heat transfer. In the case of conduction and convection heat transfer, there is a medium that transmits heat, but in the case of radiation heat transfer there is no medium. Radiant heat transfer is generated by electromagnetic waves present in the atmosphere. One of the most important examples of radiation heat transfer is the heat of the sun coming to the earth.
What is heat transfer What is conduction heat transfer What is convective heat transfer? What is radiative heat transfer
Radiation is a heat transfer method that does not require particles to carry thermal energy. Instead, heat is transmitted in the infrared (part of the electromagnetic spectrum). Heat waves are emitted from high temperature objects in all directions and advance at the speed of light until they hit another object. When this occurs, the thermal energy carried by the waves can be absorbed or reflected. As gases, liquids and solids are heated, they swell. As they cool down, they will shrink or become smaller. The expansion of gases and liquids is due to the fact that they move very quickly when the particles are heated and can be further separated so that they occupy more space. When a gas or liquid is heated in a sealed container, particles may strike the sides of the container, which can cause stress. The more collisions, the greater the pressure
Convection heat transfer, often referred to simply as convection, is the transfer of heat from one location to another due to fluid movement. Convection is usually the main form of liquid and gas heat transfer. Although generally discussed as a unique heat transfer method, convective heat transfer involves a combined process of unknown conduction (thermal diffusion) and flat flow (heat transfer by massive fluid heat transfer). Convection can be "forced" by movement of the fluid by means other than buoyancy (eg, a water pump in a car engine). The thermal expansion of the fluid may also force convection. In other cases, when the fluid is heated, the individual natural buoyancy is completely responsible for the movement of the fluid and the process is called "natural convection". An example is a chimney or a draft around the fire.