Civil Engineering (CE) Exam > Civil Engineering (CE) Notes > Civil Engineering SSC JE (Technical) > Boundary Layer Theory
Boundary Layer Theory | Civil Engineering SSC JE (Technical) - Civil Engineering (CE) PDF Download
Chapter 9 Boundary Layer Theory
- The concept of boundary layer was first introduced by L. Prandt in 1904.
- Boundary layer is a region in the immediate vicinity of the boundary surface in which the velocity of flowing fluid increases gradually from zero at the boundary surface to the velocity of the main stream.
- Boundary Conditions of Boundary Layer Region
(i) at y = 0, v = 0
(ii) at y = d, v = V0 (d = boundary layer thickness V0 = free stream velocity)
(iii) at y = d, dv/dy = 0 [∵ v = V0 = constant]
- Boundary layer thickness (d) It is defined as the distance from the boundary surface in which the velocity reaches the 99% of the velocity of the main stream.
y =d for v = 0.99 V0
- Displacement Thickness (d*) It is the distance measured normal to the boundary, by which the free stream is displaced on account of the formation of boundary layer.
The quantity (V0 – v) is known as the velocity defect.
- Momentum Thickness (q)
The ratio of displacement thickness to momentum thickness is called the shape factor (H)
H = d/q
- Its value should always greater than 1
- Energy Thickness
- Von-Korman momentum integral equation
- Blassius experimental results/ when
- Laminar Conditions : Velocity distribution is parabolic
(i) Boundary Layer thickness
(ii) Local coefficient of drag C*D
(iii) Avg. Coefficient CD
- Turbulent Conditions : Velocity distributions is logarithmic
where
d = Boundary layer thickness
t = Shear stress at solid surface
x = Distance from where solid surface starts
- Boundary Layer Separation It is caused by adverse pressure gradient
- Location of Separation point : The separation point S is determined from the condition
For a given velocity it can be determined whether the B.L.(Boundary layer) has separated or on the verge of separation or will not separate from the following conditions :
1. If
< 0 : Flow has separated.
2. If
= 0 : Flow is on verge of separation.
3. If
> 0 : Flow is attached with the surface
- Methods of Preventing Separation
(i) Rotating the boundary in the direction of flow.
(ii) Suction of the slow moving fluid by a suction slot.
(iii) Supplying additional energy from a blower.
(iv) Providing a bypass in the slotted wing.
(v) Providing guide blades in a bend.
(vi) Injecting fluid into boundary layer.
(vii)Streamlining of body shapes.
The document Boundary Layer Theory | Civil Engineering SSC JE (Technical) - Civil Engineering (CE) is a part of the Civil Engineering (CE) Course Civil Engineering SSC JE (Technical).
All you need of Civil Engineering (CE) at this link: Civil Engineering (CE)
|
2 videos|122 docs|55 tests
|
FAQs on Boundary Layer Theory - Civil Engineering SSC JE (Technical) - Civil Engineering (CE)
| 1. What is boundary layer theory in civil engineering? |  |
Ans. Boundary layer theory in civil engineering is a concept that describes the behavior of fluid flow near a solid surface. It involves the study of the thin layer of fluid that forms adjacent to the surface and how it affects the overall flow pattern and forces acting on the surface.
| 2. How is boundary layer thickness determined in civil engineering? | |
Ans. The boundary layer thickness in civil engineering is typically determined using empirical formulas or experimental data. One commonly used formula is the Blasius equation, which relates the boundary layer thickness to the distance from the leading edge of the surface and the fluid properties. Experimental methods such as hot-wire anemometry or flow visualization techniques can also be employed to measure the boundary layer thickness directly.
| 3. What are the applications of boundary layer theory in civil engineering? | |
Ans. Boundary layer theory has various applications in civil engineering. It is used to analyze the flow around structures such as buildings, bridges, and dams, which helps in designing structures to withstand wind and water forces. It is also employed in the design of aerodynamic surfaces for vehicles, such as airfoils for aircraft wings and turbine blades. Additionally, boundary layer theory is utilized in the study of soil erosion caused by fluid flow, which aids in erosion control measures.
| 4. How does boundary layer thickness affect drag in civil engineering? | |
Ans. In civil engineering, the boundary layer thickness plays a crucial role in determining the drag force experienced by a structure. A thicker boundary layer results in higher skin friction drag, which is the resistance to flow caused by the viscous interaction between the fluid and the surface. Therefore, minimizing the boundary layer thickness is essential to reduce drag and optimize the design of structures to minimize energy consumption.
| 5. What are the factors affecting boundary layer thickness in civil engineering? | |
Ans. There are several factors that influence the boundary layer thickness in civil engineering. These include the velocity of the fluid flow, the viscosity of the fluid, the roughness of the surface, and the angle of attack or inclination of the surface. Higher fluid velocities and lower viscosities tend to result in thinner boundary layers, while rough surfaces and larger angles of attack can lead to thicker boundary layers. These factors need to be considered in the design and analysis of civil engineering structures to ensure accurate predictions of flow behavior.
Related Exams
About this Document
|
1.2K Views |
|
4.81/5 Rating |
|
Dec 25, 2024 Last updated |
Document Description: Boundary Layer Theory for Civil Engineering (CE) 2024 is part of Civil Engineering SSC JE (Technical) preparation.
The notes and questions for Boundary Layer Theory have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Boundary Layer Theory covers topics
like and Boundary Layer Theory Example, for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Boundary Layer Theory.
Introduction of Boundary Layer Theory in English is available as part of our Civil Engineering SSC JE (Technical)
for Civil Engineering (CE) & Boundary Layer Theory in Hindi for Civil Engineering SSC JE (Technical) course.
Download more important topics related with notes, lectures and mock test series for Civil Engineering (CE)
Exam by signing up for free. Civil Engineering (CE): Boundary Layer Theory | Civil Engineering SSC JE (Technical) - Civil Engineering (CE)
Description
Full syllabus notes, lecture & questions for Boundary Layer Theory | Civil Engineering SSC JE (Technical) - Civil Engineering (CE) - Civil Engineering (CE) | Plus excerises question with solution to help you revise complete syllabus for Civil Engineering SSC JE (Technical) | Best notes, free PDF download
Information about Boundary Layer Theory
In this doc you can find the meaning of Boundary Layer Theory defined & explained in the simplest way possible. Besides explaining types of
Boundary Layer Theory theory, EduRev gives you an ample number of questions to practice Boundary Layer Theory tests, examples and also practice Civil Engineering (CE)
tests
|
2 videos|122 docs|55 tests
|
Download as PDF
|
Explore Courses for Civil Engineering (CE) exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Summary
,Free
,study material
,mock tests for examination
,Exam
,Previous Year Questions with Solutions
,Viva Questions
,Sample Paper
,Boundary Layer Theory | Civil Engineering SSC JE (Technical) - Civil Engineering (CE)
,MCQs
,Boundary Layer Theory | Civil Engineering SSC JE (Technical) - Civil Engineering (CE)
,Extra Questions
,Objective type Questions
,practice quizzes
,Boundary Layer Theory | Civil Engineering SSC JE (Technical) - Civil Engineering (CE)
,video lectures
,Semester Notes
,past year papers
,ppt
,shortcuts and tricks
,Important questions
;
Additional Information about Boundary Layer Theory for Civil Engineering (CE) Preparation
Boundary Layer Theory Free PDF Download
The Boundary Layer Theory is an invaluable resource that delves deep into the core of the Civil Engineering (CE) 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 Boundary Layer Theory now and kickstart your journey towards success in the Civil Engineering (CE) exam.
Importance of Boundary Layer Theory
The importance of Boundary Layer Theory cannot be overstated, especially for Civil Engineering (CE) aspirants.
This document holds the key to success in the Civil Engineering (CE) 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.
Boundary Layer Theory Notes
Boundary Layer Theory Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Boundary Layer Theory.
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, Boundary Layer Theory Notes on EduRev are your ultimate resource for success.
Boundary Layer Theory Civil Engineering (CE) Questions
The "Boundary Layer Theory Civil Engineering (CE) Questions" guide is a valuable resource for all aspiring students preparing for the
Civil Engineering (CE) 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 Boundary Layer Theory on the App
Students of Civil Engineering (CE) can study Boundary Layer Theory alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Boundary Layer Theory,
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 Boundary Layer Theory is prepared as per the latest Civil Engineering (CE) syllabus.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup