Mechanical Engineering Exam > Mechanical Engineering Notes > Heat Transfer > Problems: Heat Transfer by Natural Convection
Problems: Heat Transfer by Natural Convection | Heat Transfer - Mechanical Engineering PDF Download
Frequently Asked Questions and Problems for Practice (Module 5)
Q.1 | Define Grashof number and its physical significance. What is the analogous in forced convection? |
Q.2 | What are the criteria to know natural and forced convection? |
Q.3 | Define Rayleigh number and its physical significance. |
Q.4 | Show the flow pattern of natural convection for a (a) hot surface down, (b) hot surface up, (c) cold surface down, and (d) cold surface up. |
Q.5 | Warm air at 65oC, 3 m/s enters into a square (25 cm) duct made up of steel metal. The un-insulated duct is 10 m long and is in contact with the atmospheric air at 25oC. If the heat losses to the atmosphere by natural convection then what will be the exit warm air temperature from the duct. It may be assumed that the natural convective flow at one surface does not affect the others as the two surfaces are horizontal, one at the top and at the bottom, and the two surfaces are vertical. Calculate the heat transfer coefficient for the obviously forced convection inside of the duct. |
Q.6. | A horizontal tube having diameter of 10 mm is heated to a surface temperature of 240 oC. The tube is exposed to air at 25oC. Calculate the natural convective heat transfer. |
Q.7. | A sphere having diameter of 25 cm is heated to a surface temperature of 240 oC. The sphere is exposed to air at 25oC. Calculate the natural convective heat transfer. |
Q.8. | A square (1 m) flat plate inclined at 45 oC with the horizontal is exposed to air at 25oC and 1 atm. The plate receives 750 W/m2 from the Sun and dissipated the heat to the atmosphere by natural convection. What will be the average temperature of the plate at steady-state? |
The document Problems: Heat Transfer by Natural Convection | Heat Transfer - Mechanical Engineering is a part of the Mechanical Engineering Course Heat Transfer.
All you need of Mechanical Engineering at this link: Mechanical Engineering
|
57 videos|77 docs|86 tests
|
FAQs on Problems: Heat Transfer by Natural Convection - Heat Transfer - Mechanical Engineering
| 1. What is natural convection heat transfer? |  |
Ans. Natural convection heat transfer is a process where heat is transferred between a solid surface and a fluid (liquid or gas) due to the fluid's natural movement caused by density differences. This movement occurs without the need for any external forces such as fans or pumps.
| 2. How does natural convection occur? | |
Ans. Natural convection occurs when there is a temperature difference between the solid surface and the surrounding fluid. The fluid near the heated surface becomes less dense and rises, creating a buoyancy force. This buoyant fluid displaces the cooler fluid, which in turn becomes heated and rises. This cycle continues, forming a natural convection current.
| 3. What factors affect natural convection heat transfer? | |
Ans. Several factors influence natural convection heat transfer. These include the temperature difference between the solid surface and the fluid, the fluid properties (such as viscosity and thermal conductivity), the geometry of the system, and the orientation of the surface. Additionally, the presence of obstacles or boundaries can also affect the flow patterns and heat transfer.
| 4. How is natural convection heat transfer calculated? | |
Ans. Natural convection heat transfer can be calculated using empirical correlations or by solving the governing equations of fluid flow and heat transfer, known as the Navier-Stokes and energy equations. Empirical correlations are often used for simple geometries and conditions, while computational methods like finite element analysis or computational fluid dynamics (CFD) are employed for complex systems.
| 5. What are some applications of natural convection heat transfer in chemical engineering? | |
Ans. Natural convection heat transfer is widely applicable in various chemical engineering processes. Some examples include cooling towers, heat exchangers, boilers, condensers, and natural draft furnaces. Understanding and optimizing natural convection heat transfer is crucial for efficient operation and design of these systems, ultimately leading to energy savings and improved performance.
Related Exams
About this Document
|
4.68/5 Rating |
|
Nov 24, 2024 Last updated |
Document Description: Problems: Heat Transfer by Natural Convection for Mechanical Engineering 2024 is part of Heat Transfer preparation.
The notes and questions for Problems: Heat Transfer by Natural Convection have been prepared according to the Mechanical Engineering exam syllabus. Information about Problems: Heat Transfer by Natural Convection covers topics
like and Problems: Heat Transfer by Natural Convection Example, for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Problems: Heat Transfer by Natural Convection.
Introduction of Problems: Heat Transfer by Natural Convection in English is available as part of our Heat Transfer
for Mechanical Engineering & Problems: Heat Transfer by Natural Convection in Hindi for Heat Transfer course.
Download more important topics related with notes, lectures and mock test series for Mechanical Engineering
Exam by signing up for free. Mechanical Engineering: Problems: Heat Transfer by Natural Convection | Heat Transfer - Mechanical Engineering
Description
Full syllabus notes, lecture & questions for Problems: Heat Transfer by Natural Convection | Heat Transfer - Mechanical Engineering - Mechanical Engineering | Plus excerises question with solution to help you revise complete syllabus for Heat Transfer | Best notes, free PDF download
Information about Problems: Heat Transfer by Natural Convection
In this doc you can find the meaning of Problems: Heat Transfer by Natural Convection defined & explained in the simplest way possible. Besides explaining types of
Problems: Heat Transfer by Natural Convection theory, EduRev gives you an ample number of questions to practice Problems: Heat Transfer by Natural Convection tests, examples and also practice Mechanical Engineering
tests
|
Explore Courses for Mechanical Engineering exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Extra Questions
,Previous Year Questions with Solutions
,Sample Paper
,Exam
,ppt
,Problems: Heat Transfer by Natural Convection | Heat Transfer - Mechanical Engineering
,shortcuts and tricks
,Free
,Semester Notes
,Problems: Heat Transfer by Natural Convection | Heat Transfer - Mechanical Engineering
,MCQs
,Summary
,Important questions
,study material
,Objective type Questions
,Problems: Heat Transfer by Natural Convection | Heat Transfer - Mechanical Engineering
,practice quizzes
,video lectures
,past year papers
,mock tests for examination
,Viva Questions
;
Additional Information about Problems: Heat Transfer by Natural Convection for Mechanical Engineering Preparation
Problems: Heat Transfer by Natural Convection Free PDF Download
The Problems: Heat Transfer by Natural Convection is an invaluable resource that delves deep into the core of the Mechanical Engineering exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Problems: Heat Transfer by Natural Convection now and kickstart your journey towards success in the Mechanical Engineering exam.
Importance of Problems: Heat Transfer by Natural Convection
The importance of Problems: Heat Transfer by Natural Convection cannot be overstated, especially for Mechanical Engineering aspirants.
This document holds the key to success in the Mechanical Engineering exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Problems: Heat Transfer by Natural Convection Notes
Problems: Heat Transfer by Natural Convection Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Problems: Heat Transfer by Natural Convection.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Problems: Heat Transfer by Natural Convection Notes on EduRev are your ultimate resource for success.
Problems: Heat Transfer by Natural Convection Mechanical Engineering Questions
The "Problems: Heat Transfer by Natural Convection Mechanical Engineering Questions" guide is a valuable resource for all aspiring students preparing for the
Mechanical Engineering exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Problems: Heat Transfer by Natural Convection on the App
Students of Mechanical Engineering can study Problems: Heat Transfer by Natural Convection alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Problems: Heat Transfer by Natural Convection,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Problems: Heat Transfer by Natural Convection is prepared as per the latest Mechanical Engineering syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup