Exercise 9, Ex. 6.3 ( submarine )
|
|
- Sophia West
- 5 years ago
- Views:
Transcription
1 Exercise 9, Ex. 6.3 ( submarine The flow around a submarine moving at at velocity V can be described by the flow caused by a source and a sink with strength Q at a distance a from each other. V x Submarine p Q -Q y L a Figure : Coordinate system for submarine problem a If one wants to construct a pressure sensor that will register an approaching submarine at a distance L, what sensitivity is needed for the sensor? Assume an ideal fluid and that a = 8 m, Q = 95 m 3 /s, V = 8 m/s, L = m and ρ = kg/m 3 roughly corresponding to a submarine with length 8.5 meters and 6 m radius. Use a potential flow description ū = φ, u = φ x, v = φ y The flow is always irrotational due to the definition of the velocity potential, ω = ū = φ =, curl(grad= For incompressibility we get, ū = φ = ( φ i x i = φ = The equation is linear and thus superposition can be used. We have freestream plus 3D source plus sink, φ = V freestream + Q 4π r source + Q = V + 4π r sink Q 4π ( + a + x + y + Switch to cylindrical coordinates and notice that x + y = r. This gives Q 4π ( a + x + y + ū = φ = φ r ēr + φ r θ ēθ + φ ē = Qr ē r 4π(( + a + r Qr Q( + a +ē 3/ 4π(( a + r 3/ V + 4π(( + a + r Q( a 3/ 4π(( a + r 3/
2 Use Bernoullis equation to determine the pressure fluctuations at = L a, r =, Evaluate ū noticing that u r =, p ρ + ū = constant = p ρ + V ū( = L a, r = = ē V + Inserting the given values gives ū = and we get, Q 4π(L + Q 4π((L + a p p = ρ(v ū 7. N/m.7 mbar b How long is the submarine? Compute where u = for r =, V + Q ( 4π ( + a ( a = 4πV Q = ( a ( + a ( a ( + a = 4a ( a Solving this system gives = 43., = 36.99, where the second solution lies inside the submarine. The length is then m. c How wide is the submarine? To get this we need to compute the shape of the submarine. The stream-function is constant along streamlines and is useful for this. In spherical coordinates we get, ū ē R = u R = ū ē R ψ R sin θ θ = u R = ūē R ψ R sin θ R = u θ = ūē θ ē r = ē θ cos θ + ē R sin θ notice that u r (ē θ cos θ + ē R sin θ + u (ē R cos θ ē θ sin θ ē = ē R cos θ ē θ sin θ ē R = u r sin θ + u cos θ u R = u r sin θ + u cos θ = r = R sin θ, = R cos θ = sin θ Q 4π R sin θ (R + a + ar cos θ + 3/ (R + a ar cos θ 3/ ( cos θ V + Q R cos θ + a 4π (R + a + ar cos θ R cos θ a 3/ (R + a ar cos θ 3/ = V cos θ + Q ( R + a cos θ 4π (R + a + ar cos θ R a cos θ 3/ (R + a ar cos θ 3/ This is difficult to integrate. Simplify to a Rankine body by neglecting the sink and say that a =, u R = V cos θ + Q 4π R = ψ R sin θ θ Determine C from the stagnation point, Ψ = V R sin θ Q 4π cos θ + C u R (θ = π, R = R = Q 4πV
3 Since Ψ = on the body we get, C = Q 4π. The streamfunction is then, Ψ = V R sin θ Q (cos θ + 4π source In cartesian coordinates we get the streamfunction for a source, Ψ = Q ( 4π x + + The shape is given by Ψ =, As R, θ then R sin θ d. This gives, 5 x Figure : Rankine body for submarine problem V d 4 Q 4π = d = 4Q V π r = 4Q V π There is a simple way of determining the radius as directly. The flow from the source must take up an particular area in the flow an infinity. Since no fluid can cross the streamlines this area must be equal to that of the Rankine body: Q Q = V πr r = V π = m 3
4 We can use the computed streamfunction and displace it a distance, Ψ = Q ( 4π x + ( + Notice that R = in spherical coordinates and change coordinate system, Ψ = Q ( R cos θ R + = 4π R Q ( R cos θ R sin θ + (R cos θ R 4π R + R R R cos θ + The streamfunction for the submarine is then, Ψ = V R sin θ + Q ( R cos θ + a 4π R + a + Ra cos θ + R cos θ a R + a Ra cos θ x Figure 3: Submarine body for submarine problem At = or θ = π/ we get, Ψ = V R + Q ( a 4π R + a + a R + a For the body Ψ = and we get, Multiply by, Computing this, R R + a aq πv = R R + a + aq πv (R 3 + (R a a Q π V = R = 6.3 m 4
5 The complex potential The lines with constant streamfunction Ψ are the streamlines. They are orthogonal to the lines of constant velocity potential φ which are equipotential lines. Since both of them satisfy Laplace s equation we can define a complex function, F ( = φ(x, y + i Ψ(x, y = x + iy Figure 4: Complex potential for submarine problem, solid: Ψ, dotted: φ This is an analytical function since the Cauchy Riemann equation holds, φ x = Ψ y and φ y = Ψ x The velocity is then, w( = df d = φ x + i Ψ x = u iv This enables the use of complex analysis, in particular conformal mapping that can be used to compute the flow over airfoil shapes. 5
6 Example: Flow past a rotating cylinder centered at = λ at an angle of attack α, ] F ( = U [( + λe iα (a + λ + ( + λ eiα iγ log( + λ π ( Mapping by = Z + 4 Z a gives an airfoil shape with the potential F(. A correct flow is not achieved unless the Kutta Joukovski condition is satisfied requiring, Γ = 4πU(a + λ sin α 4 Z=f( =f (Z Figure 5: Conformal mapping from circle to airfoil shape, (a = 3,λ =.5 6
Exercise 9: Model of a Submarine
Fluid Mechanics, SG4, HT3 October 4, 3 Eample : Submarine Eercise 9: Model of a Submarine The flow around a submarine moving at a velocity V can be described by the flow caused by a source and a sink with
More informationContinuum Mechanics Lecture 7 Theory of 2D potential flows
Continuum Mechanics ecture 7 Theory of 2D potential flows Prof. http://www.itp.uzh.ch/~teyssier Outline - velocity potential and stream function - complex potential - elementary solutions - flow past a
More informationComplex functions in the theory of 2D flow
Complex functions in the theory of D flow Martin Scholtz Institute of Theoretical Physics Charles University in Prague scholtz@utf.mff.cuni.cz Faculty of Transportation Sciences Czech Technical University
More informationu = (u, v) = y The velocity field described by ψ automatically satisfies the incompressibility condition, and it should be noted that
18.354J Nonlinear Dynamics II: Continuum Systems Lecture 1 9 Spring 2015 19 Stream functions and conformal maps There is a useful device for thinking about two dimensional flows, called the stream function
More informationOffshore Hydromechanics Module 1
Offshore Hydromechanics Module 1 Dr. ir. Pepijn de Jong 4. Potential Flows part 2 Introduction Topics of Module 1 Problems of interest Chapter 1 Hydrostatics Chapter 2 Floating stability Chapter 2 Constant
More informationDo not turn over until you are told to do so by the Invigilator.
UNIVERSITY OF EAST ANGLIA School of Mathematics Main Series UG Examination 2014 15 FLUID DYNAMICS - THEORY AND COMPUTATION MTHA5002Y Time allowed: 3 Hours Attempt QUESTIONS 1 and 2, and THREE other questions.
More informationChapter 6: Incompressible Inviscid Flow
Chapter 6: Incompressible Inviscid Flow 6-1 Introduction 6-2 Nondimensionalization of the NSE 6-3 Creeping Flow 6-4 Inviscid Regions of Flow 6-5 Irrotational Flow Approximation 6-6 Elementary Planar Irrotational
More informationThe purpose of this lecture is to present a few applications of conformal mappings in problems which arise in physics and engineering.
Lecture 16 Applications of Conformal Mapping MATH-GA 451.001 Complex Variables The purpose of this lecture is to present a few applications of conformal mappings in problems which arise in physics and
More informationAn Internet Book on Fluid Dynamics. Joukowski Airfoils
An Internet Book on Fluid Dynamics Joukowski Airfoils One of the more important potential flow results obtained using conformal mapping are the solutions of the potential flows past a family of airfoil
More informationSome Basic Plane Potential Flows
Some Basic Plane Potential Flows Uniform Stream in the x Direction A uniform stream V = iu, as in the Fig. (Solid lines are streamlines and dashed lines are potential lines), possesses both a stream function
More informationAll that begins... peace be upon you
All that begins... peace be upon you Faculty of Mechanical Engineering Department of Thermo Fluids SKMM 2323 Mechanics of Fluids 2 «An excerpt (mostly) from White (2011)» ibn Abdullah May 2017 Outline
More informationVorticity Equation Marine Hydrodynamics Lecture 9. Return to viscous incompressible flow. N-S equation: v. Now: v = v + = 0 incompressible
13.01 Marine Hydrodynamics, Fall 004 Lecture 9 Copyright c 004 MIT - Department of Ocean Engineering, All rights reserved. Vorticity Equation 13.01 - Marine Hydrodynamics Lecture 9 Return to viscous incompressible
More informationWater is sloshing back and forth between two infinite vertical walls separated by a distance L: h(x,t) Water L
ME9a. SOLUTIONS. Nov., 29. Due Nov. 7 PROBLEM 2 Water is sloshing back and forth between two infinite vertical walls separated by a distance L: y Surface Water L h(x,t x Tank The flow is assumed to be
More informationMAE 101A. Homework 7 - Solutions 3/12/2018
MAE 101A Homework 7 - Solutions 3/12/2018 Munson 6.31: The stream function for a two-dimensional, nonviscous, incompressible flow field is given by the expression ψ = 2(x y) where the stream function has
More informationInviscid & Incompressible flow
< 3.1. Introduction and Road Map > Basic aspects of inviscid, incompressible flow Bernoulli s Equation Laplaces s Equation Some Elementary flows Some simple applications 1.Venturi 2. Low-speed wind tunnel
More informationPEMP ACD2505. M.S. Ramaiah School of Advanced Studies, Bengaluru
Two-Dimensional Potential Flow Session delivered by: Prof. M. D. Deshpande 1 Session Objectives -- At the end of this session the delegate would have understood PEMP The potential theory and its application
More informationOUTLINE FOR Chapter 3
013/4/ OUTLINE FOR Chapter 3 AERODYNAMICS (W-1-1 BERNOULLI S EQUATION & integration BERNOULLI S EQUATION AERODYNAMICS (W-1-1 013/4/ BERNOULLI S EQUATION FOR AN IRROTATION FLOW AERODYNAMICS (W-1-.1 VENTURI
More information1. Introduction - Tutorials
1. Introduction - Tutorials 1.1 Physical properties of fluids Give the following fluid and physical properties(at 20 Celsius and standard pressure) with a 4-digit accuracy. Air density : Water density
More informationOffshore Hydromechanics
Offshore Hydromechanics Module 1 : Hydrostatics Constant Flows Surface Waves OE4620 Offshore Hydromechanics Ir. W.E. de Vries Offshore Engineering Today First hour: Schedule for remainder of hydromechanics
More informationGeneral Solution of the Incompressible, Potential Flow Equations
CHAPTER 3 General Solution of the Incompressible, Potential Flow Equations Developing the basic methodology for obtaining the elementary solutions to potential flow problem. Linear nature of the potential
More information18.325: Vortex Dynamics
8.35: Vortex Dynamics Problem Sheet. Fluid is barotropic which means p = p(. The Euler equation, in presence of a conservative body force, is Du Dt = p χ. This can be written, on use of a vector identity,
More informationMarine Hydrodynamics Prof.TrilochanSahoo Department of Ocean Engineering and Naval Architecture Indian Institute of Technology, Kharagpur
Marine Hydrodynamics Prof.TrilochanSahoo Department of Ocean Engineering and Naval Architecture Indian Institute of Technology, Kharagpur Lecture - 10 Source, Sink and Doublet Today is the tenth lecture
More informationSimplifications to Conservation Equations
Chater 5 Simlifications to Conservation Equations 5.1 Steady Flow If fluid roerties at a oint in a field do not change with time, then they are a function of sace only. They are reresented by: ϕ = ϕq 1,
More information65 Fluid Flows (6/1/2018)
65 Fluid Flows 6//08 Consider a two dimensional fluid flow which we describe by its velocity field, V x, y = p x, y, q x, y = p + iq R. We are only going to consider flows which are incompressible, i.e.
More informationWeek 2 Notes, Math 865, Tanveer
Week 2 Notes, Math 865, Tanveer 1. Incompressible constant density equations in different forms Recall we derived the Navier-Stokes equation for incompressible constant density, i.e. homogeneous flows:
More informationFluid mechanics, topology, and complex analysis
Fluid mechanics, topology, and complex analysis Takehito Yokoyama Department of Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan (Dated: April 30, 2013 OMPLEX POTENTIAL
More informationFluid Dynamics Problems M.Sc Mathematics-Second Semester Dr. Dinesh Khattar-K.M.College
Fluid Dynamics Problems M.Sc Mathematics-Second Semester Dr. Dinesh Khattar-K.M.College 1. (Example, p.74, Chorlton) At the point in an incompressible fluid having spherical polar coordinates,,, the velocity
More informationII. Ideal fluid flow
II. Ideal fluid flow Ideal fluids are Inviscid Incompressible The only ones decently understood mathematically Governing equations u=0 Continuity u 1 +( u ) u= ρ p+ f t Euler Boundary conditions Normal
More informationAA210A Fundamentals of Compressible Flow. Chapter 1 - Introduction to fluid flow
AA210A Fundamentals of Compressible Flow Chapter 1 - Introduction to fluid flow 1 1.2 Conservation of mass Mass flux in the x-direction [ ρu ] = M L 3 L T = M L 2 T Momentum per unit volume Mass per unit
More informationDetailed Outline, M E 521: Foundations of Fluid Mechanics I
Detailed Outline, M E 521: Foundations of Fluid Mechanics I I. Introduction and Review A. Notation 1. Vectors 2. Second-order tensors 3. Volume vs. velocity 4. Del operator B. Chapter 1: Review of Basic
More informationF11AE1 1. C = ρν r r. r u z r
F11AE1 1 Question 1 20 Marks) Consider an infinite horizontal pipe with circular cross-section of radius a, whose centre line is aligned along the z-axis; see Figure 1. Assume no-slip boundary conditions
More informationMAT389 Fall 2016, Problem Set 4
MAT389 Fall 2016, Problem Set 4 Harmonic conjugates 4.1 Check that each of the functions u(x, y) below is harmonic at every (x, y) R 2, and find the unique harmonic conjugate, v(x, y), satisfying v(0,
More informationTHE VORTEX PANEL METHOD
THE VORTEX PANEL METHOD y j m α V 4 3 2 panel 1 a) Approimate the contour of the airfoil by an inscribed polygon with m sides, called panels. Number the panels clockwise with panel #1 starting on the lower
More informationLifting Airfoils in Incompressible Irrotational Flow. AA210b Lecture 3 January 13, AA210b - Fundamentals of Compressible Flow II 1
Lifting Airfoils in Incompressible Irrotational Flow AA21b Lecture 3 January 13, 28 AA21b - Fundamentals of Compressible Flow II 1 Governing Equations For an incompressible fluid, the continuity equation
More informationAE301 Aerodynamics I UNIT B: Theory of Aerodynamics
AE301 Aerodynamics I UNIT B: Theory of Aerodynamics ROAD MAP... B-1: Mathematics for Aerodynamics B-: Flow Field Representations B-3: Potential Flow Analysis B-4: Applications of Potential Flow Analysis
More informationMath 575-Lecture 19. In this lecture, we continue to investigate the solutions of the Stokes equations.
Math 575-Lecture 9 In this lecture, we continue to investigate the solutions of the Stokes equations. Energy balance Rewrite the equation to σ = f. We begin the energy estimate by dotting u in the Stokes
More informationLecture 13: Electromagnetic Theory Professor D. K. Ghosh, Physics Department, I.I.T., Bombay. Poisson s and Laplace s Equations
Poisson s and Laplace s Equations Lecture 13: Electromagnetic Theory Professor D. K. Ghosh, Physics Department, I.I.T., Bombay We will spend some time in looking at the mathematical foundations of electrostatics.
More informationIncompressible Flow Over Airfoils
Chapter 7 Incompressible Flow Over Airfoils Aerodynamics of wings: -D sectional characteristics of the airfoil; Finite wing characteristics (How to relate -D characteristics to 3-D characteristics) How
More informationAero III/IV Conformal Mapping
Aero III/IV Conformal Mapping View complex function as a mapping Unlike a real function, a complex function w = f(z) cannot be represented by a curve. Instead it is useful to view it as a mapping. Write
More informationChapter 2 Dynamics of Perfect Fluids
hapter 2 Dynamics of Perfect Fluids As discussed in the previous chapter, the viscosity of fluids induces tangential stresses in relatively moving fluids. A familiar example is water being poured into
More informationSPC Aerodynamics Course Assignment Due Date Monday 28 May 2018 at 11:30
SPC 307 - Aerodynamics Course Assignment Due Date Monday 28 May 2018 at 11:30 1. The maximum velocity at which an aircraft can cruise occurs when the thrust available with the engines operating with the
More informationComputing potential flows around Joukowski airfoils using FFTs
AB CD EF GH Computing potential flows around Joukowski airfoils using FFTs Frank Brontsema Institute for Mathematics and Computing Science AB CD EF GH Bachelor thesis Computing potential flows around
More informationAppendix: Orthogonal Curvilinear Coordinates. We define the infinitesimal spatial displacement vector dx in a given orthogonal coordinate system with
Appendix: Orthogonal Curvilinear Coordinates Notes: Most of the material presented in this chapter is taken from Anupam G (Classical Electromagnetism in a Nutshell 2012 (Princeton: New Jersey)) Chap 2
More informationPART II: 2D Potential Flow
AERO301:Spring2011 II(a):EulerEqn.& ω = 0 Page1 PART II: 2D Potential Flow II(a): Euler s Equation& Irrotational Flow We have now completed our tour through the fundamental conservation laws that apply
More information6.1 Momentum Equation for Frictionless Flow: Euler s Equation The equations of motion for frictionless flow, called Euler s
Chapter 6 INCOMPRESSIBLE INVISCID FLOW All real fluids possess viscosity. However in many flow cases it is reasonable to neglect the effects of viscosity. It is useful to investigate the dynamics of an
More informationFundamentals of Fluid Dynamics: Ideal Flow Theory & Basic Aerodynamics
Fundamentals of Fluid Dynamics: Ideal Flow Theory & Basic Aerodynamics Introductory Course on Multiphysics Modelling TOMASZ G. ZIELIŃSKI (after: D.J. ACHESON s Elementary Fluid Dynamics ) bluebox.ippt.pan.pl/
More informationThe Aharonov-Bohm Effect: Mathematical Aspects of the Quantum Flow
Applied athematical Sciences, Vol. 1, 2007, no. 8, 383-394 The Aharonov-Bohm Effect: athematical Aspects of the Quantum Flow Luis Fernando ello Instituto de Ciências Exatas, Universidade Federal de Itajubá
More information3.5 Vorticity Equation
.0 - Marine Hydrodynamics, Spring 005 Lecture 9.0 - Marine Hydrodynamics Lecture 9 Lecture 9 is structured as follows: In paragraph 3.5 we return to the full Navier-Stokes equations (unsteady, viscous
More information!! +! 2!! +!"!! =!! +! 2!! +!"!! +!!"!"!"
Homework 4 Solutions 1. (15 points) Bernoulli s equation can be adapted for use in evaluating unsteady flow conditions, such as those encountered during start- up processes. For example, consider the large
More informationMATH 566: FINAL PROJECT
MATH 566: FINAL PROJECT December, 010 JAN E.M. FEYS Complex analysis is a standard part of any math curriculum. Less known is the intense connection between the pure complex analysis and fluid dynamics.
More informationV (r,t) = i ˆ u( x, y,z,t) + ˆ j v( x, y,z,t) + k ˆ w( x, y, z,t)
IV. DIFFERENTIAL RELATIONS FOR A FLUID PARTICLE This chapter presents the development and application of the basic differential equations of fluid motion. Simplifications in the general equations and common
More informationGiven the water behaves as shown above, which direction will the cylinder rotate?
water stream fixed but free to rotate Given the water behaves as shown above, which direction will the cylinder rotate? ) Clockwise 2) Counter-clockwise 3) Not enough information F y U 0 U F x V=0 V=0
More information7 EQUATIONS OF MOTION FOR AN INVISCID FLUID
7 EQUATIONS OF MOTION FOR AN INISCID FLUID iscosity is a measure of the thickness of a fluid, and its resistance to shearing motions. Honey is difficult to stir because of its high viscosity, whereas water
More informationNPTEL web course on Complex Analysis. A. Swaminathan I.I.T. Roorkee, India. and. V.K. Katiyar I.I.T. Roorkee, India
NPTEL web course on Complex Analysis A. Swaminathan I.I.T. Roorkee, India and V.K. Katiyar I.I.T. Roorkee, India A.Swaminathan and V.K.Katiyar (NPTEL) Complex Analysis 1 / 16 Complex Analysis Module: 2:
More informationKirchhoff s Elliptical Vortex
1 Figure 1. An elliptical vortex oriented at an angle φ with respect to the positive x axis. Kirchhoff s Elliptical Vortex In the atmospheric and oceanic context, two-dimensional (height-independent) vortices
More informationexcept assume the parachute has diameter of 3.5 meters and calculate how long it takes to stop. (Must solve differential equation)
Homework 5 Due date: Thursday, Mar. 3 hapter 7 Problems 1. 7.88. 7.9 except assume the parachute has diameter of 3.5 meters and calculate how long it takes to stop. (Must solve differential equation) 3.
More informationCopyright 2007 N. Komerath. Other rights may be specified with individual items. All rights reserved.
Low Speed Aerodynamics Notes 5: Potential ti Flow Method Objective: Get a method to describe flow velocity fields and relate them to surface shapes consistently. Strategy: Describe the flow field as the
More information1. Fluid Dynamics Around Airfoils
1. Fluid Dynamics Around Airfoils Two-dimensional flow around a streamlined shape Foces on an airfoil Distribution of pressue coefficient over an airfoil The variation of the lift coefficient with the
More informationF1.9AB2 1. r 2 θ2 + sin 2 α. and. p θ = mr 2 θ. p2 θ. (d) In light of the information in part (c) above, we can express the Hamiltonian in the form
F1.9AB2 1 Question 1 (20 Marks) A cone of semi-angle α has its axis vertical and vertex downwards, as in Figure 1 (overleaf). A point mass m slides without friction on the inside of the cone under the
More informationPHYS463 Electricity& Magnetism III ( ) Solution #1
PHYS463 Electricity& Magnetism III (2003-04) lution #. Problem 3., p.5: Find the average potential over a spherical surface of radius R due to a point charge located inside (same as discussed in 3..4,
More informationFluid Mechanics Prof. T. I. Eldho Department of Civil Engineering Indian Institute of Technology, Bombay
Fluid Mechanics Prof. T. I. Eldho Department of Civil Engineering Indian Institute of Technology, Bombay Lecture No. # 35 Boundary Layer Theory and Applications Welcome back to the video course on fluid
More informationAerodynamics. Basic Aerodynamics. Continuity equation (mass conserved) Some thermodynamics. Energy equation (energy conserved)
Flow with no friction (inviscid) Aerodynamics Basic Aerodynamics Continuity equation (mass conserved) Flow with friction (viscous) Momentum equation (F = ma) 1. Euler s equation 2. Bernoulli s equation
More informationLab Reports Due on Monday, 11/24/2014
AE 3610 Aerodynamics I Wind Tunnel Laboratory: Lab 4 - Pressure distribution on the surface of a rotating circular cylinder Lab Reports Due on Monday, 11/24/2014 Objective In this lab, students will be
More informationChapter 2. Vector Calculus. 2.1 Directional Derivatives and Gradients. [Bourne, pp ] & [Anton, pp ]
Chapter 2 Vector Calculus 2.1 Directional Derivatives and Gradients [Bourne, pp. 97 104] & [Anton, pp. 974 991] Definition 2.1. Let f : Ω R be a continuously differentiable scalar field on a region Ω R
More informationthe Cartesian coordinate system (which we normally use), in which we characterize points by two coordinates (x, y) and
2.5.2 Standard coordinate systems in R 2 and R Similarly as for functions of one variable, integrals of functions of two or three variables may become simpler when changing coordinates in an appropriate
More information21 Laplace s Equation and Harmonic Functions
2 Laplace s Equation and Harmonic Functions 2. Introductory Remarks on the Laplacian operator Given a domain Ω R d, then 2 u = div(grad u) = in Ω () is Laplace s equation defined in Ω. If d = 2, in cartesian
More informationHomework Two. Abstract: Liu. Solutions for Homework Problems Two: (50 points total). Collected by Junyu
Homework Two Abstract: Liu. Solutions for Homework Problems Two: (50 points total). Collected by Junyu Contents 1 BT Problem 13.15 (8 points) (by Nick Hunter-Jones) 1 2 BT Problem 14.2 (12 points: 3+3+3+3)
More information1. Introduction, tensors, kinematics
1. Introduction, tensors, kinematics Content: Introduction to fluids, Cartesian tensors, vector algebra using tensor notation, operators in tensor form, Eulerian and Lagrangian description of scalar and
More informationENGI Gradient, Divergence, Curl Page 5.01
ENGI 94 5. - Gradient, Divergence, Curl Page 5. 5. The Gradient Operator A brief review is provided here for the gradient operator in both Cartesian and orthogonal non-cartesian coordinate systems. Sections
More information(You may need to make a sin / cos-type trigonometric substitution.) Solution.
MTHE 7 Problem Set Solutions. As a reminder, a torus with radii a and b is the surface of revolution of the circle (x b) + z = a in the xz-plane about the z-axis (a and b are positive real numbers, with
More informationASTR 320: Solutions to Problem Set 3
ASTR 30: Solutions to Problem Set 3 Problem : The Venturi Meter The venturi meter is used to measure the flow speed in a pipe. An example is shown in Fig., where the venturi meter (indicated by the dashed
More informationHomework 7-8 Solutions. Problems
Homework 7-8 Solutions Problems 26 A rhombus is a parallelogram with opposite sides of equal length Let us form a rhombus using vectors v 1 and v 2 as two adjacent sides, with v 1 = v 2 The diagonals of
More informationPart A Fluid Dynamics & Waves Draft date: 17 February Conformal mapping
Part A Fluid Dynamics & Waves Draft date: 17 February 4 3 1 3 Conformal mapping 3.1 Wedges and channels 3.1.1 The basic idea Suppose we wish to find the flow due to some given singularities (sources, vortices,
More informationVortex motion. Wasilij Barsukow, July 1, 2016
The concept of vorticity We call Vortex motion Wasilij Barsukow, mail@sturzhang.de July, 206 ω = v vorticity. It is a measure of the swirlyness of the flow, but is also present in shear flows where the
More informationFLUID DYNAMICS, THEORY AND COMPUTATION MTHA5002Y
UNIVERSITY OF EAST ANGLIA School of Mathematics Main Series UG Examination 2017 18 FLUID DYNAMICS, THEORY AND COMPUTATION MTHA5002Y Time allowed: 3 Hours Attempt QUESTIONS 1 and 2, and THREE other questions.
More informationMatlab GUI for Elementary Flows as an Educational Tool
Matlab GUI for Elementary Flows as an Educational Tool Gabriel A. Heredia Acevedo, Bernardo Restrepo, and Jonathan Holguino Polytechnic University of Puerto Rico Abstract Elementary flows in fluid mechanics
More information2.25 Advanced Fluid Mechanics
MIT Department of Mechanical Engineering 2.25 Advanced Fluid Mechanics Problem 10.3 This problem is from Advanced Fluid Mechanics Problems by A.H. Shapiro and A.A. Sonin Consider the three different, steady,
More informationAER210 VECTOR CALCULUS and FLUID MECHANICS. Quiz 4 Duration: 70 minutes
AER210 VECTOR CALCULUS and FLUID MECHANICS Quiz 4 Duration: 70 minutes 26 November 2012 Closed Book, no aid sheets Non-programmable calculators allowed Instructor: Alis Ekmekci Family Name: Given Name:
More information1.060 Engineering Mechanics II Spring Problem Set 3
1.060 Engineering Mechanics II Spring 2006 Due on Monday, March 6th Problem Set 3 Important note: Please start a new sheet of paper for each problem in the problem set. Write the names of the group members
More informationChapter 3 Bernoulli Equation
1 Bernoulli Equation 3.1 Flow Patterns: Streamlines, Pathlines, Streaklines 1) A streamline, is a line that is everywhere tangent to the velocity vector at a given instant. Examples of streamlines around
More informationControl Volume. Dynamics and Kinematics. Basic Conservation Laws. Lecture 1: Introduction and Review 1/24/2017
Lecture 1: Introduction and Review Dynamics and Kinematics Kinematics: The term kinematics means motion. Kinematics is the study of motion without regard for the cause. Dynamics: On the other hand, dynamics
More informationLecture 1: Introduction and Review
Lecture 1: Introduction and Review Review of fundamental mathematical tools Fundamental and apparent forces Dynamics and Kinematics Kinematics: The term kinematics means motion. Kinematics is the study
More information3.1 Definition Physical meaning Streamfunction and vorticity The Rankine vortex Circulation...
Chapter 3 Vorticity Contents 3.1 Definition.................................. 19 3.2 Physical meaning............................. 19 3.3 Streamfunction and vorticity...................... 21 3.4 The Rankine
More informationHW6. 1. Book problems 8.5, 8.6, 8.9, 8.23, 8.31
HW6 1. Book problems 8.5, 8.6, 8.9, 8.3, 8.31. Add an equal strength sink and a source separated by a small distance, dx, and take the limit of dx approaching zero to obtain the following equations for
More informationPart IB. Fluid Dynamics. Year
Part IB Year 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2018 14 Paper 1, Section I 5D Show that the flow with velocity potential φ = q 2π ln r in two-dimensional,
More informationStudy fluid dynamics. Understanding Bernoulli s Equation.
Chapter Objectives Study fluid dynamics. Understanding Bernoulli s Equation. Chapter Outline 1. Fluid Flow. Bernoulli s Equation 3. Viscosity and Turbulence 1. Fluid Flow An ideal fluid is a fluid that
More informationPhysics 3323, Fall 2016 Problem Set 2 due Sep 9, 2016
Physics 3323, Fall 26 Problem Set 2 due Sep 9, 26. What s my charge? A spherical region of radius R is filled with a charge distribution that gives rise to an electric field inside of the form E E /R 2
More informationGauss s Law. Name. I. The Law: , where ɛ 0 = C 2 (N?m 2
Name Gauss s Law I. The Law:, where ɛ 0 = 8.8510 12 C 2 (N?m 2 1. Consider a point charge q in three-dimensional space. Symmetry requires the electric field to point directly away from the charge in all
More informationGiven a stream function for a cylinder in a uniform flow with circulation: a) Sketch the flow pattern in terms of streamlines.
Question Given a stream function for a cylinder in a uniform flow with circulation: R Γ r ψ = U r sinθ + ln r π R a) Sketch the flow pattern in terms of streamlines. b) Derive an expression for the angular
More informationRapid Design of Subcritical Airfoils. Prabir Daripa Department of Mathematics Texas A&M University
Rapid Design of Subcritical Airfoils Prabir Daripa Department of Mathematics Texas A&M University email: daripa@math.tamu.edu In this paper, we present a fast, efficient and accurate algorithm for rapid
More informationChapter II. Complex Variables
hapter II. omplex Variables Dates: October 2, 4, 7, 2002. These three lectures will cover the following sections of the text book by Keener. 6.1. omplex valued functions and branch cuts; 6.2.1. Differentiation
More informationSurface Tension Effect on a Two Dimensional. Channel Flow against an Inclined Wall
Applied Mathematical Sciences, Vol. 1, 007, no. 7, 313-36 Surface Tension Effect on a Two Dimensional Channel Flow against an Inclined Wall A. Merzougui *, H. Mekias ** and F. Guechi ** * Département de
More informationFigure 3: Problem 7. (a) 0.9 m (b) 1.8 m (c) 2.7 m (d) 3.6 m
1. For the manometer shown in figure 1, if the absolute pressure at point A is 1.013 10 5 Pa, the absolute pressure at point B is (ρ water =10 3 kg/m 3, ρ Hg =13.56 10 3 kg/m 3, ρ oil = 800kg/m 3 ): (a)
More informationENGI Gradient, Divergence, Curl Page 5.01
ENGI 940 5.0 - Gradient, Divergence, Curl Page 5.0 5. e Gradient Operator A brief review is provided ere for te gradient operator in bot Cartesian and ortogonal non-cartesian coordinate systems. Sections
More information3 Generation and diffusion of vorticity
Version date: March 22, 21 1 3 Generation and diffusion of vorticity 3.1 The vorticity equation We start from Navier Stokes: u t + u u = 1 ρ p + ν 2 u 1) where we have not included a term describing a
More informationFluid Mechanics (3) - MEP 303A For THRID YEAR MECHANICS (POWER)
كلية الھندسة- جامعة القاھرة قسم ھندسة القوى الميكانيكية معمل التحكم األوتوماتيكى Notes on the course Fluid Mechanics (3) - MEP 303A For THRID YEAR MECHANICS (POWER) Part (3) Frictionless Incompressible
More information7 Curvilinear coordinates
7 Curvilinear coordinates Read: Boas sec. 5.4, 0.8, 0.9. 7. Review of spherical and cylindrical coords. First I ll review spherical and cylindrical coordinate systems so you can have them in mind when
More informationPDEs in Spherical and Circular Coordinates
Introduction to Partial Differential Equations part of EM, Scalar and Vector Fields module (PHY2064) This lecture Laplacian in spherical & circular polar coordinates Laplace s PDE in electrostatics Schrödinger
More informationWhy airplanes fly, and ships sail
Why airplanes fly, and ships sail A. Eremenko April 23, 2013 And windmills rotate and propellers pull, etc.... Denote z = x + iy and let v(z) = v 1 (z) + iv 2 (z) be the velocity field of a stationary
More informationRandom Problems. Problem 1 (30 pts)
Random Problems Problem (3 pts) An untwisted wing with an elliptical planform has an aspect ratio of 6 and a span of m. The wing loading (defined as the lift per unit area of the wing) is 9N/m when flying
More information