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By Hairer E.

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9) Note that on the molecular level gravity can be neglected since A/ps2 . 9) forewarn us that we will have to solve large systems of nonlinear, second order, ordinary differential equations (2N in two dimensions and 3N in three dimensions), and that these will have to be solved numerically. The method to be used is based on the leap frog formulas (see Appendix III). 3. 65 ˚ A. 1. 4235 molecules. 2. Cavity problem. At each point (x(i), y(i)) we set a water vapor molecule Pi , i = 1, 4235. 1. To complete the initial data, note that in two dimensions the rms velocA/ps.

30) n ≥ 2. 31) Proof. 24) with n = 0. 25) with n = 0. 31) follow readily by mathematical induction. 5. 21) are covariant relative to the x∗ = x − a, Proof. y ∗ = y − b; a, b constants. Define v0,x = v0,x∗ , v0,y = v0,y∗ . 1, v1,x = 2 (x∗ + a) − (x∗0 + a) − v0,x∗ = v1,x∗ . 1 yield   n−1 2  ∗ (xn + a) + (−1)n (x∗0 + a) + 2 (−1)j (x∗n−j + a) vn,x = ∆t j=1 + (−1)n v0,x∗ . 32) implies vn,x = vn,x∗ . Similarly, vn,y = vn,y∗ . Thus, for all n = 0, 1, 2, 3, . . vn,x = vn,x∗ , vn,y = vn,y∗ . Thus, ∗ Fn,x ∗ = Fn,x = m vn+1,x − vn,x vn+1,x∗ − vn,x∗ =m .

0. 3. 6. Note that these results agree qualitatively with experimental results for cavity flow in the large (Freitas et al. (1985)). 6, but with larger primary vortices, were obtained with V = −40, −130, and −600. 6. Turbulent Flow Generation Turbulence is the most common yet least understood type of fluid flow. Turbulent flows have two well defined characteristics: (1) Many small vortices appear and disappear quickly (Kolmogorov (1964)), and (2) A strong current develops across the usual primary direction (Schlichting (1960)).

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