Convection, Conduction and Radiation - Essay Example

Comments (0) Cite this document
Summary
HEAT TRANSFERS: CONVECTION, CONDUCTION, AND RADIATION 1 Heat Transfers: Convection, Conduction and Radiation A Pertinent Study Heat Transfer in the Context of Three Different Ways Your Name Your School’s Name HEAT TRANSFERS: CONVECTION, CONDUCTION, AND RADIATION 2 Abstract Heat is defined as the transmission of heat or thermal energy over a clear-cut border all over a thermodynamic system…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER96.6% of users find it useful
Convection, Conduction and Radiation
Read TextPreview

Extract of sample "Convection, Conduction and Radiation"

Download file to see previous pages The energy transferred from one system to another is called the internal energy. Internal energy is, although not in all cases, is proportional to temperature. Essentially, the transfer of energy or heat starts from the system with the higher temperature to the system with the lower temperature. The higher the internal energy of the system, the higher is the temperature of the system. However, there are cases when there are no changes on the temperature of the system even though there was an increment on the internal energy of that system. Such case will be explained later as part of the examples of conduction. There are several ways on how to transfer energy or heat: thermal convection, thermal conduction and thermal radiation or simply called convection, conduction and radiation. These three modes of transfer of energy have different operations going on. This particular study aims to explain heat transfer via the three methods aforementioned. Keywords: conduction, convection, radiation, internal energy, heat, system HEAT TRANSFERS: CONVECTION, CONDUCTION, AND RADIATION 3 Thermal Convection Thermal convection, also known as convection, is a transfer of heat from one object to another wherein the heat travels in motion through liquids. In Physics, fluids include liquid substances, gases, and some plastic solids. When the temperature of a liquid rises, the liquid becomes lighter or less dense; nevertheless, if the temperature of the liquid decreases, it becomes denser and it relatively falls down. In thermal convection, what happens is that when there is a massive motion by the liquids like gases or liquid substances, it tends to create a circular motion since a solid body, when heated, transfers the energy to the liquid. Convection takes place when the liquid that was heated becomes lighter and therefore rises. When it reaches the top of the circulation, the temperature of the liquid decreases, hence, making it denser which causes it to fall down. The cycle creates convection current. Further, free convection takes place when the movements of the fluids are caused to move by the buoyant forces as a result of varying densities brought about by the rapid changed in the temperature. Forced convection, on the other hand, takes place when the fluid gets in contact with the surface of the solid system using outside or external means. There are several examples that will help us clearly understand the principles behind thermal convection. If you happen to observe when you boil pasta or beans, the moment the water (liquid) reaches its boiling point, the beans or the pasta moves up and down and from side to side or it triggers the pasta or the beans to move in random directions. The explanation of this HEAT TRANSFERS: CONVECTION, CONDUCTION, AND RADIATION 4 particular scenario as what have been explained earlier is that, the moment the temperature of the liquid increases, it becomes less dense or lighter causing it to rise above the surface and when it reaches the top and it cools down, which means there is a relative decrease on the temperature, it becomes denser and therefore falls down which creates a cycle. The changes on the temperature and the density of the liquid are principal factors causing the rising and falling movement of the pasta and the beans. The portion where ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Convection, Conduction and Radiation Essay Example | Topics and Well Written Essays - 1500 words”, n.d.)
Retrieved from https://studentshare.org/physics/1440115-conduction-convection-and-radiation
(Convection, Conduction and Radiation Essay Example | Topics and Well Written Essays - 1500 Words)
https://studentshare.org/physics/1440115-conduction-convection-and-radiation.
“Convection, Conduction and Radiation Essay Example | Topics and Well Written Essays - 1500 Words”, n.d. https://studentshare.org/physics/1440115-conduction-convection-and-radiation.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Convection, Conduction and Radiation

Radiation safety

...Radiation Safety It is widely agreed that laws play an instrumental role in checking the behavior of the public in order to ensure that it is in line with the societal expectations. Relative rules and regulations play an imperative role in preventing incidences of confusion and contradictions that can have far reaching implications on the holistic wellbeing of the society. Just like in other facets of the society, medical imaging has established distinctive rules and regulations that guide the behavior of the practitioners at various stages. In this respect, it is worth appreciating that radioactivity is very dangerous and medical implications are unbelievably adverse. For this reason, the Australian government has...
4 Pages(1000 words)Essay

Radiation Treatment of Foods

...Radiation Treatment for Food Preservation: Good or Bad? Radiation treatment used in food preservation has positive and negative effects but based on the results of researches it has more advantages compared to hazards. The positive effects of radiation treatment include effective disinfection, cost-efficient and time-efficient method of food processing, and good retention on quality of food and related commodities (Alothman et al. 201; Dionisio et al. 1267). Effective disinfection is related to the sterilization and removal of pathogens in the food (Dionisio et al. 1267). The radiation treatment of food is also cost-efficient or cheaper compared to other methods and can...
2 Pages(500 words)Research Paper

Radiation

...) for the period 1989-1996, and through a health questionnaire survey coupled with medical verification of self-reported tumors for the period 1945-1988. PROVIDING INFORMATION TO NRI TREATED PATIENTS: The patients treated with NRI need to be given proper information regarding the risk that they are up to because of the radioactive radiations that the treatment involves. They need to be informed about the results of various studies that are being conducted to relate cancer with NRI. The public has the right to know more regarding such issues. Research and documentation regarding the known facts of the issue have to be made publicly accessible. There is a need for making accurate information available to...
8 Pages(2000 words)Essay

Convection Currents

...Convection Currents Convection is the transfer of heat in a gas or liquid by the circulation of currents from one region to another. In a solid, conduction transfers heat from one molecule to another, but in convection the heated fluid or gas itself is actually moving. As it does, it removes or displaces cooler liquid or air in its path. The flow of the heated medium in this situation is called convection current. Figure 1 illustrates the activity of an atmospheric convection cell. As the ground heats a cell of air it rises. The entire column, or cell, moves upward where it meets with the cooler air. This is known as a...
3 Pages(750 words)Essay

Radiation Experiments

... Radiation Experiments Introduction Ultraviolet rays are a form of electromagnetic waves whose wavelengthis much shorter than that of the visible light. The wavelength varies from 10nm to 400nm, the energy of these wave ranges from 3eV to 124eV. The sun emits UV rays and is one of the natural sources of these rays. Artificially, these rays are produced by backlights, fluorescent lights and electric arcs such as those produced during welding. UV rays have many substantial effects and damages to both living things and the materials. It triggers chemical reactions, causes substances to grow and causes sun burn to people. UV rays are also beneficial to humans; these include the UV watermark that helps in authentication of credit cards... with...
19 Pages(4750 words)Essay

Interview conduction and job description

...Ways of Conducting Effective Interview For most of the employers and employees, conducting interviews is a frustrating process. In actual, the experience of interviewing can be made more pleasant by making it more effective. It is essential to learn how to conduct effective interviews in less time. Some of the techniques which can be helpful in making interviews more effective are mentioned in the subsequent paragraphs. Interviews are usually consisted of four basic steps. They include: Planning the interview Questions to be asked/ or not to be asked Conducting the interview Post interview Planning the interview Planning the interview involves those arrangements which...
4 Pages(1000 words)Research Paper

Radiation Protection Process

...Radiation Protection Number Radiation protection is the process whereby the individual working in a place where radiation is emitted are protected from its harmful exposure. The individual uses different protection gears. For example, some protection materials are capable of absorbing the radiation. Basically, the protection gears are meant to eliminate or reduce the harmful effects of the radiation emissions. In addition to protecting the human beings from these radiations, the environment is also protected. This is because the radiation can also bring some changes in the environment that will affect the human or...
1 Pages(250 words)Essay

Radiation

...Radiation Describe three ways in which you may be exposed to radiation in your community in the next 12 months. Incorporate a reference from a source retrieved from the database link provided above. Provide 5 full sentences. In our community, there exists various ways through which I could be exposed to radiation in the next 12 months. The first could be from exposure to the sun responsible for cosmic radiation as a result of solar flares. I could also be exposed to radon gas from enclosed environments such as home known to emit the radioactive alpha particles. Finally, I could be exposed to radiation from radio nuclides ingested into the body through...
2 Pages(500 words)Essay

Radiation

...to protect tissue sensitive to radiation (ie, eye, thyroid, ovaries, testes).We should base the specific policy and procedure on the patient and the study to be conducted. Finally, patient and staff member safety is a priority and a concern for every preoperative team member. Radiation safety requires policy and procedures based on evidence, which involves educational updates for the preoperative team on current issues and concerns, and staff member training on risk-reduction measures. The preoperative team is responsible for understanding the various radiological modalities, the risks and benefits, and risk-reduction strategies for operating equipment safely. . Bibliography Edmund...
10 Pages(2500 words)Research Paper

Heat transfer by convection

...Heat transfer by convection Insert Insert Summarize the main points made by three papers Paper Natural convection heat transferin enclosures is applied in solar collectors, energy storage systems, and electronic devices. Nanofluid is the main fluid used in heat transfer enhancements like solar cells, solar collectors, automobiles and micro channels. It makes utility of the electronic devices and phase change materials. Using nanofluids in the natural convection in cavities are studied using numeric works and by observing literature. Numerically, different models were used for calculating viscosity and thermal conductivity on natural heat transfer (Ho et al.). A square...
5 Pages(1250 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Convection, Conduction and Radiation for FREE!

Contact Us