TREATMENT OF NUMERICAL DIFFUSION IN STRONG CONVECTIVE FLOWS (EN)

MITSOULIS, E (EN)

ASSIMACOPOULOS, D (EN)

ARAMPATZIS, G (EN)

A three-dimensional extension of the QUICK scheme adapted for the finite volume method and non-uniform grids is presented to handle convection-diffusion problems for high Peclet numbers and steep gradients. The algorithm is based on three-dimensional quadratic interpolation functions in which the transverse curvature terms are maintained and the diagonal dominance of the coefficient matrix is preserved. All formulae are explicitly given in an appendix. Results obtained with the classical upwind (UDS), the simplified QUICK (transverse terms neglected) and the present full QUICK schemes are given for two benchmark problems, one two-dimensional, steady state and the other three-dimensional, unsteady state. Both QUICK schemes are shown to give superior solutions compared with the UDS in terms of accuracy and efficiency. The full QUICK scheme performs better than the simplified QUICK, giving even for coarse grids acceptable results closer to the analytical solutions, while the computational time is not affected much. (EN)

journalArticle (EN)

Mathematics, Interdisciplinary Applications (EN)

CONVECTIVE TRANSPORT (EN)

FINITE VOLUME METHOD (EN)

Computer Science, Interdisciplinary Applications (EN)

Physics, Fluids & Plasmas (EN)

Mechanics (EN)

DISCRETIZATION SCHEMES (EN)

QUICK SCHEME (EN)

BENCHMARK PROBLEMS (EN)

SIMULATION (EN)

UPWINDING (EN)

Εθνικό Μετσόβιο Πολυτεχνείο

Ψηφιακό Αποθετήριο της Κεντρικής Βιβλιοθήκης του ΕΜΠ | Dspace@NTUA

Κεντρική Βιβλιοθήκη Ε.Μ.Π.

Ιδρυματικό Αποθετήριο

Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS (EN)

Αγγλική γλώσσα

1994 (EN)

http://hdl.handle.net/123456789/11391

331 (EN)

0271-2091 (EN)

3 (EN)

313 (EN)

18 (EN)

10.1002/fld.1650180306 (EN)

ISI:A1994MV88800005 (EN)

JOHN WILEY & SONS LTD (EN)