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Motivation for Studying Fluid Mechanics

Motivation for Studying Fluid Mechanics. Faculty of Engineering Fluid Mechanics Lecture 3 Dr. Hasan Hamouda. Motivation for Studying Fluid Mechanics. Fluid Mechanics is omnipresent Aerodynamics Bioengineering and biological systems Combustion Energy generation Geology

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Motivation for Studying Fluid Mechanics

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  1. Motivation for Studying Fluid Mechanics Faculty of Engineering Fluid Mechanics Lecture 3 Dr. Hasan Hamouda

  2. Motivation for Studying Fluid Mechanics • Fluid Mechanics is omnipresent • Aerodynamics • Bioengineering and biological systems • Combustion • Energy generation • Geology • Hydraulics and Hydrology • Hydrodynamics • Meteorology • Ocean and Coastal Engineering • Water Resources • …numerous other examples… • Fluid Mechanics is beautiful

  3. Aerodynamics

  4. Bioengineering

  5. Energy generation

  6. Geology

  7. River Hydraulics

  8. Hydraulic Structures

  9. Hydrodynamics

  10. Meteorology

  11. Water Resources

  12. Fluid Mechanics is Beautiful

  13. Tsunamis • Tsunami: Japanese for “Harbour Wave” • Created by earthquakes, land slides, volcanoes, asteroids/meteors • Pose infrequent but high risk for coastal regions.

  14. Tsunamis: role in religion, evolution, and apocalyptic events? • Most cultures have deep at their core a flood myth in which the great bulk of humanity is destroyed and a few are left to repopulate and repurify the human race. In most of these stories, God is meting out retribution, punishing those who have strayed from his path • Were these “local” floods due to a tsunami instead of global events?

  15. Tsunamis: role in religion, evolution, and apocalyptic events? • La Palma Mega-Tsunami = geologic time bomb? Cumbre Vieja volcano erupts and causes western half of La Palma island to collapse into the Atlantic and send a 1500 ft. tsunami crashing into Eastern coast of U.S.

  16. Methods for Solving Fluid Dynamics Problems • Analytical Fluid Dynamics (AFD) Mathematical analysis of governing equations, including exact and approximate solutions. • Computational Fluid Dynamics (CFD) Numerical solution of the governing equations • Experimental Fluid Dynamics (EFD) Observation and data acquisition.

  17. Analytical Fluid Dynamics How fast do tsunamis travel in the deep ocean? Incompressible Navier-Stokes equations Linearized wave equation for inviscid, irrotational flow Shallow-water approximation, l/h >> 1 For g = 32.2 ft/s2 and h=10000 ft, c=567 ft/s = 387 miles/hr

  18. Computational Fluid Dynamics • In comparison to analytical methods, which are good for providing solutions for simple geometries or behavior for limiting conditions (such as linearized shallow water waves), CFD provides a tool for solving problems with nonlinear physics and complex geometry. Animation by Vasily V. Titov, Tsunami Inundation Mapping Efforts, NOAA/PMEL

  19. Experimental Fluid Dynamics • Oregon State University Wave Research Laboratory • Model-scale experimental facilities • Tsunami Wave Basin • Large Wave Flume • Dimensional analysis is very important in designing a model experiment which represents physics of actual problem

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