Caterina Calgaro, Jean-François Coulombel, Thierry Goudon's Analysis and Simulation of Fluid Dynamics PDF

By Caterina Calgaro, Jean-François Coulombel, Thierry Goudon

ISBN-10: 3764377410

ISBN-13: 9783764377410

This quantity collects the contributions of a convention held in June 2005, on the laboratoire Paul Painlevé (UMR CNRS 8524) in Lille, France. The assembly used to be meant to check sizzling themes and destiny traits in fluid dynamics, with the target to foster exchanges of theoretical and numerical viewpoints.The content material of the quantity may be cut up into 3 categories:A first set of contributions is dedicated to the outline of the relationship among diverse versions of fluid dynamics. a tremendous a part of those papers is dependent upon the dialogue of the modeling concerns, the id of the appropriate dimensionless coefficients, and at the actual interpretation of the models.A moment set of contributions considers the query of the soundness of specific constructions in fluid mechanics equations.The 3rd set of contributions is worried with numerical matters; it's certainly an important problem to layout numerical schemes which are in a position to trap the complicated positive factors generated by means of fluid flows.

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From left to right stream-function, vorticity and pressure fields on grid 1024 × 1024 at times t = 10 (top) and t = 200 (bottom). 01 0 0 50 100 time 150 200 100 0 50 100 time 150 200 Figure 5. Comparison of the energy (left) and the enstrophy (right) histories at Re = 100, 000 with the two initialisations. cut we can isolate the vortices directly on the vorticity field. Then the remaining is essentially made of the vorticity filaments in between. Now we can analyse each part separately as it is shown on Figure 9 computing the 2D Fourier spectrum.

Remark that such a situation is important from a physical point of view: the dam break situation. 5. Other viscous terms in the literature In [34], different diffusive terms are proposed, namely −2νdiv(hD(u)), or −νhΔu or else −νΔ(hu). The reader is referred to [3] for the study of such diffusive terms in the low Reynolds approximation. Let us give some comments around the last two propositions. Diffusive term equal to −νhΔ. It is shown by P. Gent in [23], that this form, which is frequently used for the viscous adiabatic shallow-water equations, is energetically inconsistent compared to the primitive equations.

Levermore, M. Oliver, E. Titi, in [31], to conclude to global existence and uniqueness of strong solutions. A degenerate bottom function. This is the case when b vanishes on the boundary (the shore). Suppose that ϕ is a function equivalent to the distance to the boundary, that is ϕ ∈ C ∞ (Ω), Ω = {ϕ > 0} and ∇ϕ = 0 on ∂Ω. Assuming that b = ϕa where a > 0 and the problem on the stream function may be written under the form Ψ|∂Ω = 0. (22) −ϕΔΨ + a∇ϕ · ∇Ψ = ϕa+1 ω in Ω, The case a = 1, that is b = ϕ, is physically the most natural.

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Analysis and Simulation of Fluid Dynamics by Caterina Calgaro, Jean-François Coulombel, Thierry Goudon

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