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Duck-Joo Lee

2013-11-11
10:40:00 - 12:00:00

308 , Mathematics Research Center Building (ori. New Math. Bldg.)

A compact scheme is preferred in real simulations because of compact stencil with the same quality of flows. Those high resolution schemes are superior in capturing acoustic wave, vorticity wave and entropy wave in convection term. Boundary problems in the body surface and near the computational domain will be discussed. Non-reflection boundary condition in the computational domain is used. Up-wind schemes or mixed central schemes are used. Flow around a circular cylinder is simulated to show the vortex shedding and characteristics of acoustic radiation due to the fluctuations of surface pressure. Relation between dipole and quadruple source will be discussed. Several feedback mechanisms between acoustic and flows will be shown such as in the cavity flow, whistle noise and supersonic jet screech tone. Possible simulations of incompressible and compressible high Reynolds turbulence flow will be discussed.

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