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Compressible Fluid Flow and Systems of Conservation Laws in Several Space Variables downloadPDF, EPUB, MOBI

Compressible Fluid Flow and Systems of Conservation Laws in Several Space Variables downloadPDF, EPUB, MOBI

Compressible Fluid Flow and Systems of Conservation Laws in Several Space Variables by A Majda
Compressible Fluid Flow and Systems of Conservation Laws in Several Space Variables
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Author: A Majda
Number of Pages: 172 pages
Published Date: 20 Jun 1984
Publisher: Springer-Verlag New York Inc.
Publication Country: New York, NY, United States
Language: English
ISBN: 9780387960371
File size: 12 Mb
File Name: Compressible.Fluid.Flow.and.Systems.of.Conservation.Laws.in.Several.Space.Variables.pdf
Download Link: Compressible Fluid Flow and Systems of Conservation Laws in Several Space Variables
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Conservation laws arise from the modeling of physical processes through the following three steps: 1) The appropriate physical balance laws are derived for m-phy- t cal quantities, ul"'~ with u = (ul' ...,u ) and u(x,t) defined m for x = (xl"'~) E RN (N = 1,2, or 3), t > 0 and with the values m u(x,t) lying in an open subset, G, of R , the state space. The state space G arises because physical quantities such as the density or total energy should always be positive; thus the values of u are often con- strained to an open set G. 2) The flux functions appearing in these balance laws are idealized through prescribed nonlinear functions, F.(u), mapping G into J j = 1, ..* ,N while source terms are defined by S(u,x,t) with S a given smooth function of these arguments with values in Rm. In parti- lar, the detailed microscopic effects of diffusion and dissipation are ignored. 3) A generalized version of the principle of virtual work is applied (see Antman [1]). The formal result of applying the three steps (1)-(3) is that the m physical quantities u define a weak solution of an m x m system of conservation laws, o I + N(Wt'u + r W *F.(u) + W*S(u,x,t))dxdt (1.1 ) R xR j=l Xj J for all W E C~(RN x R+), W(x,t) E Rm.

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