1 / 53

MAE 101 A INTRODUCTORY FLUID MECHANICS Winter 2009 http://maecourses.ucsd.edu/mae101a/ Instructor:

MAE 101 A INTRODUCTORY FLUID MECHANICS Winter 2009 http://maecourses.ucsd.edu/mae101a/ Instructor: Dr. Juan C. Lasheras. Professor of Mechanical Aerospace Engineering and Bioengineering. ( lasheras@ucsd.edu ) Office: EBU II room 579. phone: 45437 Office hours: Tu. 2pm-4:00pm

rolf
Download Presentation

MAE 101 A INTRODUCTORY FLUID MECHANICS Winter 2009 http://maecourses.ucsd.edu/mae101a/ Instructor:

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MAE 101 A INTRODUCTORY FLUID MECHANICS Winter 2009 http://maecourses.ucsd.edu/mae101a/ • Instructor: Dr. Juan C. Lasheras. Professor of Mechanical Aerospace Engineering and Bioengineering. (lasheras@ucsd.edu) Office: EBU II room 579. phone: 45437 Office hours: Tu. 2pm-4:00pm • Teaching Assistants: Head TA: Silvana Sartori. ssartori@ucsd.edu. Office hours: TBA TA: Anson Brune. abrune@ucsd.edu. Office hours. Tu. Noon – 2PM. EBU2 room 105 TA. Kathie Osterday Chapin. Lecture Room :Center 115. Tu. and Th. 5:00 pm - 6:50pm • TA Discussion Sessions: TAs will hold weekly (optional) discussion sessions to solve sample problems and answer student questions. TA discussion sessions will start on Friday, Jan. 9 th.Room TBA

  2. Prerequisites: Math 20 E (vector calculus), 21 D (differential equations) or equivalent are required. • Course Description: Fluid statics; fluid kinematics; integral and differential forms of the conservation laws of mass, momentum and energy; Bernoulli equation; potential flows; dimensional analysis and similitude. • Textbook: FLUID MECHANICS. Frank M. White .McGraw Hill. 2005 (6th edition)

  3. Tentative Class Schedule WeekTopics • Week 1, Introduction. Fundamental Concepts. (Chapter 1) • Week 2, Basic Flow Analysis Techniques. Streamlines, Streaklines, Pathlines. (Chapter 1) • Week 3, Fluid Statics. Pressure and Pressure Gradients, Hydrostatic Forces, Buoyancy (Chapter 2) • Week 4, Basic Equations in Integral Form for Control Volume. The Reynolds Transport Theorem. Conservation of Mass. (Chapter 3) • FIRST MIDTERMJanuary 29th, 2009 9 (in class) • Week 5, Basic Equations in Integral Form for Control Volume. Conservation of Linear and Angular Momentum, Energy Equation (Continuation of Chapter 3) • Week 6, Motion of a Fluid Particle (Chapter 4). • Week 7,Basic Equations of Fluid Motion in Differential form. (Chapter 4) • SECOND MIDTERM February 19th , 2009 (in class) • Week 8, Basic Equations of Fluid Motion in Differential formConservation of Mass and Momentum. (Chapter 4) • Week 9, Incompressible, Inviscid Flow. Euler’s Equation. Bernoulli Equation. (Chapter 3 and 4) • Week 10, Dimensional Analysis and Similarity. (Chapter 5) • Week 11, FINAL EXAM. March 19th. 7PM - 10 PM

  4. Homework: Homework will be assigned each week. Due every Th. at noon (EBU II 564). TAs will solve problems in his weekly discussion sessions. • Grading: Homework 10% 1st Midterm Exam. 25% 2nd Midterm Exam. 25% Final Exam. March 19th 2009. 7PM - 10 PM: 40%

  5. UCSD POLICY ON INTEGRITY OF SCHOLARSHIP Students' Responsibility • Students are expected to complete the course in compliance with the instructor's standards. No student shall engage in any activity that involves attempting to receive a grade by means other than honest effort; for example: No student shall knowingly procure, provide, or accept any unauthorized material that contains questions or answers to any examination or assignment to be given at a subsequent time. • No student shall complete, in part or in total, any examination or assignment for another person. • No student shall knowingly allow any examination or assignment to be completed, in part or in total, for himself or herself by another person. • No student shall plagiarize or copy the work of another person and submit it as his or her own work. • No student shall employ aids excluded by the instructor in undertaking course work or in completing any exam or assignment. • No student shall alter graded class assignments or examinations and then resubmit them for re-grading.Any breach of academic honesty will be considered grounds for failure in the course

  6. Academic Policy on Integrity and Scholarship. Refer to Student Link website: UCSD Policy on Integrity and Scholarship. http://www-senate.ucsd.edu/manual/appendices/app2.htm

  7. MECHANICS: That science, or branch of Physics, which treats of the action of forces on bodies. • That part of mechanics which considers the action of forces in producing rest or equilibrium is called Statics ; that which relates to such action in producing motion is called Dynamics. • The term mechanics includes the action of forces on all bodies, whether solid, liquid, or gaseous. It is sometimes, however, and formerly was often, used distinctively of solid bodies only • FLUID MECHANICS: The branch of Physics, which treats of the action of forces on fluids. • In the case of liquid is called also Hydrostatics, or Hydrodynamics, according as the laws of rest or of motion are considered. • Aerodynamics: The mechanics of bodies moving in the atmosphere • The mechanics of gaseous bodies is called also Pneumatics.

  8. Fluid • A continuous, amorphous substance whose molecules move freely past one another and that has the tendency to assume the shape of its container; a liquid or gas.

  9. Fluidsshare the properties of not resisting deformation and the ability to flow. These properties are typically a function of their inability to support a shear stress in static equilibrium. While in a solid, stress is a function of strain, in a fluidstressis a function of rate of strain.

  10. in a fluid stress is a function of rate of strain dynamic viscosity,

  11. Why study Fluid Mechanics? AERODYNAMICS

  12. Why study Fluid Mechanics? AERODYNAMICS

  13. Why study Fluid Mechanics? SUPERSONIC AERODYNAMICS

  14. Why study Fluid Mechanics? AERODYNAMICS

  15. Why study Fluid Mechanics? Aerospace Propulsion

  16. Why study Fluid Mechanics? Industrial Gas Turbine for Power Generation

  17. Why study Fluid Mechanics? JET (aerodynamic) NOISE

  18. Why study Fluid Mechanics? HYDRODYNAMICS

  19. Why study Fluid Mechanics? OCEANOGRAPHY

  20. Why study Fluid Mechanics? Geophysical, Environmental Fluid Mechanics, Climatology

  21. Why study Fluid Mechanics? Weather Forecasting, Climatology

  22. Why study Fluid Mechanics? Geophysical Fluid Mechanics

  23. Why study Fluid Mechanics? Long-term Weather Prediction

  24. Why is the water always cold in Southern California Pacific Coast?

  25. The effect of winds on the vertical movement of water Upwelling along the coast caused by Ekman transport of waters (waters move to the right of the wind). The waters moved offshore are replaced by waters from below. This brings cold, nutrient rich waters to the surface. As the winds blow over the ocean, sea surface temperatures drop about 4°C (7°F), indicating an upwelling of deep ocean water. Chlorophyll concentrations in the surface water go from negligible, in the absence of winds, to very active at more than 1.5 milligrams per cubic meter in the presence of the winds.

  26. Why study Fluid Mechanics? The effect of winds on the vertical movement of water Downwelling caused by Ekman transport onshore (movement of water to the right of the wind direction).

  27. SANTA ANA WINDS

  28. Santa Ana Winds Peninsular Range Transverse Range

  29. Adiabatic Compression g = 1.4 for air P0.4 /T1.4= Constant Anabatic winds: decompresses, cools down and looses humidity Katabatic winds: dry air compresses and heats up

  30. Santa Ana Winds The hottest temperature ever recorded in North America outside Death Valley, 133°F (56°C), was recorded on June 17, 1859 off the coast of Santa Barbara during a Santa Ana wind (Sundowner wind).

  31. Santa Ana Winds Peninsular Range Transverse Range Katabatic winds (from the Greek word katabatikos), Föhn wind or Foehn winds, Chinook winds

  32. Why study Fluid Mechanics? Combustion, Chemically Reacting Flows, Chemical Engineering

  33. Why study Fluid Mechanics? Chemical Reactors

  34. Why study Fluid Mechanics? Heat Transfer

  35. Pollution Dispersion

  36. Why study Fluid Mechanics? Environmental Fluid Mechanics

  37. Why study Fluid Mechanics?

  38. Why study Fluid Mechanics?

  39. Why study Fluid Mechanics?

  40. Why study Fluid Mechanics?

  41. Aerodynamics of a Football

  42. Abdominal Aortic Aneurysms (AAA) BIOFLUID MECHANICS Fusiform: spindle shaped, may involve considerable portion of the vessel

  43. Three-dimensional Volume rendering of an Abdominal Aortic Aneurysm L R

  44. AAA Occurrence • Affected: 4-5 % of U.S. Population: 1,500,000 patients • 250,000 new cases per year • Responsible for ~25,000 deaths per year • 10th leading cause of death in males (>55 years) • Upon rupture death is often sudden • Mortality rate as high as 80-90 %

  45. A A-A cross cut: Flow in the transverse plane A Flow in the longitudinal plane

  46. Jet detached from the walls Recirculation eddies

  47. Jet detached from the walls Recirculation eddies

More Related