Class6_kinematics - ES330 Section 2 Dr Douglas Bohl 239...

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ES330, Section 2 Dr. Douglas Bohl 239 Camp x6683, [email protected] www.clarkson.edu/~dbohl/es330 9/9/2010 1 Experimental results of the velocity and vorticity fields in the wake of an oscillating airfoil
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Outline • Kinematics – Velocity – Acceleration • Flow visualization – Streamlines, pathlines, particle trajectories 9/9/2010 2 • Learning Objective: Be able to calculate the acceleration at any point in a flow given the velocity field • HW#2: Due today • HW #3: Will be posted sometime today • Tomorrow from 2-3 in Camp 177 I will be giving a seminar on some of my work. You all are invited.
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Continuum Description • Reality of fluids – LOTS of molecules – All have their own motion (unlike in a solid) – Way to many to keep track of 9/9/2010 3 • Luckily molecules have a net motion – If you use a big enough sample of a fluid you can describe the properties within that volume – Use a fluid “particle” – tiny patch of fluid that is big enough to have the continuum satisfied – So how big? 10 -9 mm 3
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Field Description • We define the properties of a fluid as a function of their location and of the time 9/9/2010 4
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Eulerian / Lagrangian Description • Lagrangian: Follow a specific fluid particle as it moves – Care about the fluid properties as a function of time 9/9/2010 5
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Class6_kinematics - ES330 Section 2 Dr Douglas Bohl 239...

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