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Flowfield-dependent mixed explicit-implicit (FDMEI) methods for high and low speed and compressible and incompressible flows by K.T. Yoon; S.Y. Moon; S.A. Garcia; G.W. Heard; T.J. Chung is a Engineering article available to read on EtoBox.

What is Flowfield-dependent mixed explicit-implicit (FDMEI) methods for high and low speed and compressible and incompressible flows about?

Despite significant achievements in computational fluid dynamics, there still remain many fluid flow phenomena not well understood. For example, the prediction of temperature distributions is inaccurate when temperature gradients are high, particularly in shock wave turbulent boundary layer interactions close to the wall. Complexities of fluid flow phenomena include transition to turbulence. relaminarization, separated flows, transition between viscous and inviscid, incompressible and compressible flows, among others, in all speed regimes. The purpose of this paper is to introduce a new approach, called the Flowjeld-Dependent Mixed Explicit-implicit (FDMEI) method, in an attempt to resolve these difficult issues in CFD. In this process. a total of six implicitness parameters characteristic of the current flowfield are introduced. They are calculated from the current flowfield or changes of Mach numbers, Reynolds numbers. Peclet numbers. and Damkohler numbers (if reacting) at each nodal point and time step. This implies that every nodal point or element is provided with different or unique numerical scheme according to their current flowfield situations, whether compressible. incomp

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Author

K.T. Yoon; S.Y. Moon; S.A. Garcia; G.W. Heard; T.J. Chung

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0045-7825)

Published

1998

Language

EN

Field

Engineering (Physical Sciences)