There are numerous topics to explain to make your presentation interesting to the audience and impressive enough to get high marks. It would be great to present the science of heat transfer to them because this phenomenon is used both in many spheres and everywhere around us.
Understanding Heat Transfer Phenomenon
The science of heat transfer is the science that explains the processes related to heat transfer and how to apply them in various situations. When it comes to the basic terms in this sphere, the definition of heat transfer will come first because you have to understand what processes happen during this activity. So, heat transfer is the process that happens when there is some temperature difference between two bodies or systems. In other words, the thermal energy is transferred from one object to another and leads to a temperature shift. Moreover, there are three basic types of heat transfer that occur depending on different circumstances.
First of all, there is a conduction which is a process of transferring heat due to direct contact between objects. When it comes to conduction process, you should remember that it is usually associated with solids because they allow better heat transfer. A good example of the heat transfer of this kind will be the situation when you hold a cup with hot coffee but not with gloves on your hands. Thus, the heat goes to your hands through the handle.
Secondly, there is a convection mode of heat transfer which implies a process where heat moves with the help of fluids. This mode is typical for liquids and gases since their molecules are free enough to exchange thermal energy. The example of such process will be the process of boiling water in a pan. As soon as heat is applied to the pan, then the water starts warming from the bottom, becomes light, and moves to the upper parts of a pan.
Finally, the last mode of heat transfer is radiation which means that the heat moves due to electromagnetic waves. As for the example of this process, it may be noted that solar radiations are transferred via space to Earth making the planet warmer.
The Science Behind Heat Transfer Process
Having understood the modes of heat transfer, now you have to know about science behind this process. To be honest, to understand the science of heat transfer phenomena, it is necessary to consider the basic laws of thermodynamics. First of all, it is needed to mention the first law of thermodynamics or the law of energy conservation which says that energy cannot be created or destroyed; only converted from one form to another.
The second law of thermodynamics is also called the law of entropy which says that entropy of a closed system constantly increases over time. It means that as far as the processes go on, more and more entropy appears in this system.
As for the example of this law, it is possible to speak about a process that takes place when you cool the hot liquid. Gradually, entropy will appear in the environment of the hot object due to thermal energy transfer.
Application of the Knowledge about Heat Transfer
Speaking about the applications of this knowledge, it should be mentioned that there are numerous applications of this knowledge for different spheres like engineering and physics or even daily life. First of all, you should realize the importance of these phenomena in engineering because heat transfer can be applied to developing heat exchangers, refrigeration systems, and even power plants. As for physics, this phenomenon allows studying different materials depending on temperature, pressure, etc. Moreover, it is possible to find applications of this knowledge even in household appliances. For instance, the most useful appliance using this phenomenon is a heat pump that transfers heat from one location to another.
Conclusion
To sum it all up, it is essential to mention that the heat transfer phenomena are important both in different sciences and engineering. Three modes of heat transfer described above are quite significant in order to develop heat pumps or to conduct scientific studies.
If you want to learn more about heat transfer, try to obtain the appropriate degree in engineering or physics and study this problem.
