Title: The modelling of rectangular hole flow with downwards baffle

Authors: Jianhua Zhai, Yuanhao Zhai

Addresses: Department of Chemical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, 050018, China; College of the Environment North China Electrical Power University, No. 204 Qingnian Road, Baoding City 071003, Hebei, China. ' Department of Electronic Engineering, School of Information Science and Technology, Tsinghua University, Beijing 100084, China

Abstract: It is found that κ-ε model can be used to model the fluid flow of rectangular hole flow with downward baffle. A powerful commercial package CFX has been used to simulate this kind of flow in three-dimensions. Eulerian approach/framework has been used for the calculation. Detailed simulation results for the test case from laminar to turbulent flow under different Re-numbers are presented. The simulation plots of hole discharge coefficient and flow resistant factor are showed as well. A formula of jet outlet-angle (α) with the baffle-angle (β) has been developed to predict the fluid outlet ejection. It is found that angle α is quite different from that of inlet angle β. A circulation of outlet stream was found within the simulation column when the fluid jets out of the hole. The formula can be a reference to make further research on rectangular hole flow.

Keywords: modelling; rectangular hole flow; simulation; CFX; downwards baffle; fluid flow; laminar flow; turbulent flow; jet outlet; computational fluid dynamics; CFD.

DOI: 10.1504/IJMIC.2010.037039

International Journal of Modelling, Identification and Control, 2010 Vol.11 No.3/4, pp.256 - 261

Available online: 21 Nov 2010 *

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