NUMERICAL STUDY OF DISK DRIVE ROTATING FLOW STRUCTURE IN THE CAVITY

Kwan Ouyang, Reui-Kuo Lin, Shun-Feng Tsai

Abstract: This paper aim in conducting the numerical simulation of laminar flow to explore disk-driven vortical flow structure of a cubical container subjected to a disk rotation on the roof of the container in different Reynolds numbers to observe the flow structure and the reason of vortical flow form. For this study, finite difference method with dispersion-relation- preserving (DRP) scheme is dispersed governing equations space term, but adopt time term with TVD Runge-Kutta method. To add accuracy of numerical, this thesis also uses topology theory to analyze the characteristic of singular point. Three-dimensional vertical flow is observed flow structure and move to condition. The result to obtain Reynolds numbers to increase attracting spiral nodes increasingly approaches the floor of the cavity. We have also depicted the vertical flow structure in terms of cortex cores which provide more details about how change of the Reynolds number

Keywords: disk-driven, finite difference method, dispersion-relation-preserving (DRP), Runge-Kutta, topology theory

DOI: https://doi.org/10.15623/ijret.2015.0401044