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The burnout heat flux in the nucleate boiling regime is a function ofwhich of the following properties?
1. Heat of evaporation
2. Temperature difference
3. Density of vapour
4. Density of liquid
5. Vapour-liquid surface tension
Select the correct answer using the codes given below:
Codes:
1. Heat of evaporation
2. Temperature difference
3. Density of vapour
4. Density of liquid
5. Vapour-liquid surface tension
Select the correct answer using the codes given below:
Codes:
- a)1, 2, 4 and 5
- b)1, 2, 3 and 5
- c)1, 3, 4 and 5
- d)2, 3 and 4
Correct answer is option 'C'. Can you explain this answer?
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The burnout heat flux in the nucleate boiling regime is the maximum heat flux that can be transferred before the onset of film boiling. It is an important parameter in many engineering applications, as it determines the maximum heat removal capacity of a boiling system. The burnout heat flux is influenced by several properties, which are discussed below:
1. Heat of evaporation: The heat of evaporation is the amount of energy required to change a liquid into a vapor at a constant temperature. It is a measure of the energy absorbed or released during the phase change process. The higher the heat of evaporation, the greater the amount of heat that can be transferred during boiling, leading to a higher burnout heat flux.
2. Temperature difference: The temperature difference between the heated surface and the bulk liquid affects the rate of heat transfer during boiling. A larger temperature difference results in a higher driving force for heat transfer, leading to an increased burnout heat flux.
3. Density of vapor: The density of the vapor phase affects the convective heat transfer coefficient during boiling. A higher vapor density leads to a higher convective heat transfer coefficient, which in turn increases the burnout heat flux.
4. Density of liquid: The density of the liquid phase affects the boiling heat transfer coefficient. A higher liquid density results in a higher boiling heat transfer coefficient, leading to an increased burnout heat flux.
5. Vapor-liquid surface tension: The surface tension between the vapor and liquid phases affects the stability of the boiling process. A higher surface tension inhibits the formation and growth of vapor bubbles, leading to a lower burnout heat flux.
In summary, the burnout heat flux in the nucleate boiling regime is influenced by the heat of evaporation, temperature difference, density of vapor, density of liquid, and vapor-liquid surface tension. These properties collectively determine the maximum amount of heat that can be transferred before film boiling occurs.
1. Heat of evaporation: The heat of evaporation is the amount of energy required to change a liquid into a vapor at a constant temperature. It is a measure of the energy absorbed or released during the phase change process. The higher the heat of evaporation, the greater the amount of heat that can be transferred during boiling, leading to a higher burnout heat flux.
2. Temperature difference: The temperature difference between the heated surface and the bulk liquid affects the rate of heat transfer during boiling. A larger temperature difference results in a higher driving force for heat transfer, leading to an increased burnout heat flux.
3. Density of vapor: The density of the vapor phase affects the convective heat transfer coefficient during boiling. A higher vapor density leads to a higher convective heat transfer coefficient, which in turn increases the burnout heat flux.
4. Density of liquid: The density of the liquid phase affects the boiling heat transfer coefficient. A higher liquid density results in a higher boiling heat transfer coefficient, leading to an increased burnout heat flux.
5. Vapor-liquid surface tension: The surface tension between the vapor and liquid phases affects the stability of the boiling process. A higher surface tension inhibits the formation and growth of vapor bubbles, leading to a lower burnout heat flux.
In summary, the burnout heat flux in the nucleate boiling regime is influenced by the heat of evaporation, temperature difference, density of vapor, density of liquid, and vapor-liquid surface tension. These properties collectively determine the maximum amount of heat that can be transferred before film boiling occurs.
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The burnout heat flux in the nucleate boiling regime is a function ofwhich of the following properties?1. Heat of evaporation2. Temperature difference3. Density of vapour4. Density of liquid5. Vapour-liquid surface tensionSelect the correct answer using the codes given below:Codes:a)1, 2, 4 and 5b)1, 2, 3 and 5c)1, 3, 4 and 5d)2, 3 and 4Correct answer is option 'C'. Can you explain this answer?
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The burnout heat flux in the nucleate boiling regime is a function ofwhich of the following properties?1. Heat of evaporation2. Temperature difference3. Density of vapour4. Density of liquid5. Vapour-liquid surface tensionSelect the correct answer using the codes given below:Codes:a)1, 2, 4 and 5b)1, 2, 3 and 5c)1, 3, 4 and 5d)2, 3 and 4Correct answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The burnout heat flux in the nucleate boiling regime is a function ofwhich of the following properties?1. Heat of evaporation2. Temperature difference3. Density of vapour4. Density of liquid5. Vapour-liquid surface tensionSelect the correct answer using the codes given below:Codes:a)1, 2, 4 and 5b)1, 2, 3 and 5c)1, 3, 4 and 5d)2, 3 and 4Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The burnout heat flux in the nucleate boiling regime is a function ofwhich of the following properties?1. Heat of evaporation2. Temperature difference3. Density of vapour4. Density of liquid5. Vapour-liquid surface tensionSelect the correct answer using the codes given below:Codes:a)1, 2, 4 and 5b)1, 2, 3 and 5c)1, 3, 4 and 5d)2, 3 and 4Correct answer is option 'C'. Can you explain this answer?.
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