Computational Techniques for Complex Transport Phenomena by Wei Shyy, S. S. Thakur, H. Ouyang, J. Liu, E. Blosch PDF

By Wei Shyy, S. S. Thakur, H. Ouyang, J. Liu, E. Blosch

ISBN-10: 0511665466

ISBN-13: 9780511665462

ISBN-10: 0521023602

ISBN-13: 9780521023603

ISBN-10: 0521592682

ISBN-13: 9780521592680

This ebook describes a few newly built computational strategies and modeling options for examining and predicting complicated shipping phenomena. It summarizes advances within the context of a pressure-based set of rules and discusses equipment corresponding to discretization schemes for treating convection and strain, parallel computing, multigrid equipment, and composite, multiblock thoughts. the ultimate bankruptcy is dedicated to useful functions that illustrate the benefits of a variety of numerical and actual instruments. The authors offer quite a few examples through the textual content.

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Extra info for Computational Techniques for Complex Transport Phenomena

Example text

Consequently, some linearized versions of implicit TVD schemes have been devised (Yee 1986, 1987, Yee et al. 1985). 50) The superscripts n and n + 1 signify the previous and current iteration levels at steady state, respectively. The above nonlinear equation can be linearized by dropping the superscripts of the coefficients of Ai±\wn+l from n + 1 to n. This form can be shown to be TVD (Yee 1987). This form of the implicit scheme cannot be expressed in the conservation form and thus it is nonconservative except at steady state, where it has been shown that it does reduce to a conservative form (Yee 1987).

Also, it should be noted that the coefficient matrix has a dominant diagonal. For the boundary control volumes, first-order numerical fluxes are employed to obtain the coefficients AE, Aw, etc. 2 Pressure Correction Equation In the pressure correction equation, for compressible flows, density corrections are related to pressure corrections through the equation of state. This changes the nature of the pressure correction equation from a pure diffusion equation (for incompressible flows) to a convection-diffusion equation (for compressible flows).

Two different formulations, which lead to different pressure fluxes, are discussed. The eigenvalues of the respective pressure fluxes are used to interpret the physical significance of the two formulations. It is shown that the most desirable formulation is perhaps that which is consistent with the physical mechanism that the convective fluxes get transported at the mean convection speed and the pressure signals propagate both upstream and downstream in subsonic flows. Two one-dimensional test cases - the standard shock tube problem and a longitudinal combustion instability problem previously investigated by Shyy et al.

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Computational Techniques for Complex Transport Phenomena by Wei Shyy, S. S. Thakur, H. Ouyang, J. Liu, E. Blosch

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