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Assessment of CFD Estimation Capability for the Local Loss Coefficients of Sudden Contraction and Expansion  

Kim, Hyun-Jung (Department of Mathematics, Hoseo University)
Park, Jong-Pil (School of Mechanical Engineering, Pusan National University)
Publication Information
Applied Chemistry for Engineering / v.21, no.3, 2010 , pp. 258-264 More about this Journal
Abstract
Most of fluid systems, such as P&ID in ships, power plants, and chemical plants, consist of various components. The components such as bends, tees, sudden-expansions, sudden-contractions, and orifices contribute to overall pressure loss of the system. The local pressure losses across such components are determined using a pressure loss coefficient, k-factor, in lumped parameter models. In many engineering problems Idelchik's k-factor models have been used to estimate them. The present work compares the k-factor based on CFD calculation against Idelchik's model in order to confirm whether a commercial CFD package can be used for pressure loss coefficient estimation of complex geometries. The results show that RSM is the best appropriate for evaluating pressure loss coefficient. Commercial CFD package can be used as a tool evaluating k-factor even though the accuracy is influenced by a turbulence model.
Keywords
local loss coefficient; CFD; sudden-expansion; sudden-contraction; orifice;
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