Numerical Simulation of Annular Flow Boiling in a Vertical Pipe Using Two-Fluid Model

Cukrov, Alen and Sato, Yohei and Boras, Ivanka and Ničeno, Bojan (2018) Numerical Simulation of Annular Flow Boiling in a Vertical Pipe Using Two-Fluid Model. = Numerical Simulation of Annular Flow Boiling in a Vertical Pipe Using Two-Fluid Model. In: 9th International Congress of Croatian Society of Mechanics, 18-22.09.2018., Split, Hrvatska.

[img]
Preview
Text
956095.Cukrov_et_al.pdf - Published Version Jezik dokumenta:English

Download (502kB) | Preview
Official URL: https://www.bib.irb.hr/956095

Abstract

The goal of this paper is to develop a numerical model for computation of annular flow boiling in a vertical pipe under 70 bar pressure and 10 K inlet subcooling. The model is based on two-fluid formulation in conjunction with an extended formulation of Rensselaer Polytechnic Institute model for boiling flows. Here, the successful modeling of the annular flow boiling is achieved by use of closure correlations for interfacial transfer proposed by [1]. This refers to constitutive relations for vapor-bubble diameter and interfacial lift force, both being computed as flow regime dependent. A uniform wall heat flux is applied at the pipe wall, while the inlet mass fluxes were varied. The model validation is done by comparison of vapor volume fraction at specific points near the pipe outlet with the data extracted from measurements conducted by [2]. The obtained results agree well with the experimental data, thus indicating the reliability of the developed model in computation of such multiphase flow phenomena.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Annular flow boiling, Two-fluid model, CFD
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 300 Department of Thermodynamics, Thermal and Process Engineering > 310 Chair of Technical Thermodynamics
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 25 Sep 2018 12:30
Last Modified: 25 Sep 2018 12:30
URI: http://repozitorij.fsb.hr/id/eprint/8841

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

Nema podataka za dohvacanje citata