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Large Eddy Simulations for Incompressible Flows : an Introduction by Dr. Pierre Sagaut (auth.) is a nonfiction available to read on EtoBox.

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Still today, turbulence in fluids is considered as one of the most difficult problems of modern physics. Yet we are quite far from the complexity of microscopic molecular physics, since we only deal with Newtonian mechanics laws applied to a continuum, in which the effect of molecular fluctuations has been smoothed out and is represented by molecular-viscosity coefficients. Such a system has a dual behaviour of determinism in the Laplacian sense, and extreme sensitivity to initial conditions because of its very strong non­ linear character. One does not know, for instance, how to predict the critical Reynolds number of transition to turbulence in a pipe, nor how to compute precisely the drag of a car or an aircraft, even with today's largest computers. 1 We know, since the meteorologist Richardson, numerical schemes allow­ ing us to solve in a deterministic manner the equations of motion, starting with a given initial state and with prescribed boundary conditions. They are based on moment um and energy balances. However, such aresolution requires formidable computing power, and is only possible for low Reynolds numbers. These Direct-Numerical Simulations may involve calculating the

Who reads Large Eddy Simulations for Incompressible Flows : an Introduction?

Author

Dr. Pierre Sagaut (auth.)

Publisher

Springer Berlin Heidelberg

Published

2001

Language

EN

ISBN

9783662044162

Category

nonfiction

Subjects

Science, Mathematics, Engineering