MATH 228: Mathematical Fluid Dynamics Instructor: J. T. Beale Fluid mechanics reaches from practical engineering problems to difficult mathematical questions. Mathematics is involved in formulating basic principles, modeling and predicting observed phenomena, and designing reliable numerical methods. No course can cover all the aspects of this subject. This course will include a basic treatment of the theoretical foundations of fluid mechanics, and introductions to several topics, with emphasis on the incompressible case (liquids, or gases at low speeds). Basic topics will include (at least) the formulation and significance of the Euler and Navier-Stokes equations for flow without or with viscosity; stress; vorticity; conservation of circulation etc. in inviscid flow; potential flow and its relation to Laplace's equation; boundary layers and the Prandtl equations; low Reynolds number flow; and flow instabilities. Further topics may depend on time and the interest of those enrolled. Students should have some familiarity with partial differential equations at either undergraduate or graduate level, a working (not just passive) knowledge of vector calculus, and the mathematical maturity of a graduating math major. Familiarity with complex analysis (Cauchy's theorem, integrals by residues) is desirable but not essential. Students who are unsure whether their background is adequate should consult the instructor, Tom Beale, beale@math.duke.edu.