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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

VERTICAL ANNULAR GAS/LIQUID FLOWS WITH A 1D TWO-FLUID MODEL: EVALUATION OF INTERFACIAL FRICTION MODELS

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpf.024401
pages 6869-6876

Sinopsis

Two-phase vertical flows are often found in several different applications, for example, in biological process, refrigeration, oil and nuclear industries. At the present work, the flow is modelled with the one-dimensional two-fluid model, which consists of a set of conservation equations for each phase. A dynamic pressure closure model is employed to guarantee that the set of governing equations is well-posed. Furthermore, different interfacial friction models are evaluated. The conservation equations were discretized with a first order time integration and a TVD (Total Variation Diminishing) scheme with Van Leer limiter function for the spatial discretization. A systematic grid convergence test is performed to demonstrate mesh independence. Results for the void- fraction, liquid film thickness and pressure-drop for different combinations of interfacial friction models were compared to experimental data, presenting good agreement.