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우주식(Jusik Woo),이경환(Kyeonghwan Lee),위보워(Wi bowo),정한식(Hanshik Chung),정효민(Hyomin Jeong) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
In designing of condensers, the prediction of pressure drop is very important to predict the heat transfer coefficient. Modeling of two phase flow, inside a horizontal tube using CFD analysis is difficult with available two phase model in Fluent because of its changing flow patterns continuously. In this paper presents the CFD analysis of two phase flow of refrigerants inside a horizontal tube of 1.2m length three different inner model diameters of 0.085m, 0.0125m and 0.02141m, respectively, is carried out using 3D model under adiabatic condition. The considered refrigerants are R12 and R134a. The analysis is conducted at different temperatures and flow rates to evaluate the local frictional pressure drop. Using 3D model, average properties are obtained for each refrigerants. Obtained pressure drop data is compared with separated flow models available in literature.