Fluid Mechanics

Fluid Mechanics

Hyungmin Park

Multiphase Flow and Flow Visualization Lab.

Fall 2022, undergraduate course

Course Introduction

q Fluid Mechanics 001 (M2794.001300, 001) q Prof. Hyungmin Park(박형민)

o Office: 301동 1405호 (Tel: 880-4159) o Email: hminpark@snu.ac.kr

o Office hour: with appointment

q Goals

o In this course,

• we study the basic theories and concepts of fluid dynamics and derive the governing equations to describe the relevant

phenomena

• to possess the capability of understanding and analyzing the fluid

mechanics phenomena occurring in the diverse industrial and

natural environments.

Course Introduction

q Textbook o Main

• Fluid Mechanics (F. M. White), McGraw-Hill Higher Education

• Lecture Notes (to be uploaded after each class)

• Supplementary materials – please check “eTL” frequently o References

• Viscous Fluid Flow (F. White)

• Boundary Layer Theory (H. Schlichting)

• ETC.

q Evaluation

o Attendance (10%), Homework (15%), Midterm1 (20%), Midterm2 (20%), Final (35%)

Course Introduction

q Scope (Schedule) – to be operated flexibly o Ch.1

• Concept of fluid, Continuum, Properties of fluid flow,

Dimensions and units, Basic flow analysis techniques, Flow patterns

o Ch.2

• Pressure and pressure gradient, Hydrostatic pressure o Ch.3

• Basic physical laws of fluid mechanics, Reynolds transport theorem, Control volume analysis

o Ch.4

• Equations for mass and linear momentum conservation -

continuity and Navier-Stokes equation

Course Introduction

q Scope (Schedule) – to be operated flexibly o Ch.5

• Principle of dimensional homogeneity, Non-dimensional parameters, Pi-theorem

o Ch.6

• Internal viscous flows, laminar vs. turbulent flows, skin-friction drag

o Boundary-layer theory

TA info

q

여지은(yeojieun@snu.ac.kr), 김대일(rlaeodlf7598@snu.ac.kr)

q Lab. Location: 313동 222호 (Tel: 880-9161)

q TA Hour

o Flipped learning (online) – TA video will be uploaded in eTL biweekly o Q&A

o To solve example problems

o To derive theory/equation, not covered in the lecture

o Some stuffs covered in TA hour will be reflected in the exams.

Fluid Mechanics

q Fluids essential to life

o Human body 65% water

o Earth ’ s surface is 2/3 water

o Atmosphere extends 17 km above the earth ’ s surface

q History shaped by fluid mechanics o Geomorphology

o Human migration and civilization

o Modern scientific and mathematical theories and methods o Warfare

q Affects every part of our lives

History

Faces of Fluid Mechanics

Archimedes

(C. 287-212 BC) Newton

(1642-1727) Leibniz

(1646-1716) Euler

(1707-1783)

Navier

(1785-1836) Stokes

(1819-1903) Reynolds

(1842-1912) Prandtl

(1875-1953)

Bernoulli

(1667-1748)

Taylor

(1886-1975)

History

민태기 박사 강연 기계산업경영2

“경계를 뛰어넘은 과학자들”

9월 14일 16:00 301동 118호

Significance

q Fluids omnipresent o Weather & climate

o Vehicles: automobiles, trains, ships, and planes, etc.

o Environment o Energy

o Biology

o Semiconductor industry

o Physiology, medicine, and virus o Sports & recreation

o Many other examples!

Boundary-layer flow (경계층 유동)

Kelvin-Helmholtz instability (Karman vortex street)

Kelvin-Helmholtz instability (Karman vortex street)

Flow around a streamlined body

Diverse flows in industry…

Vehicles

Vehicles

Environment

Physiology and Medicine

Ventricular assist device

Physiology and Medicine

Flows in Nature

Sports & Recreation

Energy & Power conversion

다

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