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ME353: Fluid MechanicsInformation and Introduction

Ibrahim SezaiDepartment of Mechanical Engineering

Eastern Mediterranean University

Fall 2009

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Instructor and Teaching Assistants

Ibrahim SezaiProf. of Mechanical EngineeringPh.D., Eastern Mediterranean University

Seyed Mahdi MousaviAmir M. Mirlatifi

Graduate students in Mechanical EngineeringHome country: Iran

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Textbook

Fluid Mechanics: Fundamentals and ApplicationsYunus Cengel (UNV Reno) and John Cimbala (Penn State)ISBN: 0072472367 Published Jan. 2005 Includes DVD with movies created at PSU by Prof. Gary SettlesAvailable at

Bookstore

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Homework

PhilosophyOne of the best ways to learn something is through practice and repetitionTherefore, homework assignments are extremely important in this class!Homework sets will be carefully designed, challenging, and comprehensive. If you study and understand the homework, you should not have to struggle with the exams

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Motivation for Studying Fluid Mechanics

Some Application Areas of Fluid MechanicsAerodynamicsBioengineering and biological systemsCombustionEnergy generationGeologyHydraulics and HydrologyHydrodynamicsMeteorologyOcean and Coastal EngineeringWater Resources…numerous other examples…

Fluid Mechanics is beautiful

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Aerodynamics

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Bioengineering

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Energy generation

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Geology

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River Hydraulics

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Hydraulic Structures

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Hydrodynamics

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Meteorology

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Water Resources

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Fluid Mechanics is Beautiful

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Piping and plumbing system

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Boats

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Cars

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Power plants

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Aircraft and spacecraft

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Human body

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Wind Turbines

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Natural flows and weather

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Tsunamis

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

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Methods for Solving Fluid Dynamics Problems

Analytical Fluid Dynamics (AFD)Mathematical analysis of governing equations, including exact and approximate solutions. This is the primary focus of ME353Computational Fluid Dynamics (CFD)Numerical solution of the governing equationsExperimental Fluid Dynamics (EFD)Observation and data acquisition.

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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, λ/h >> 1

For g = 32.2 ft/s2 and h=10000 ft, c=567 ft/s = 387 miles/hr

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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

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Experimental Fluid Dynamics

Oregon State University Wave Research LaboratoryModel-scale experimental facilities

Tsunami Wave BasinLarge Wave Flume

Dimensional analysis (Chapter 7 of C&C) is very important in designing a model experiment which represents physics of actual problem

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Experimental Fluid Dynamics

Experiments are sometimes conducted in the field or at full scale For tsunamis, data acquisition is used for warningDART: Deep-ocean Assessment and Reporting of Tsunamis Primary sensor: Bourdon tube for measuring hydrostatic pressure