Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Transient Numerical Simulation of Two-Phase Flow using a Compact Scheme
Submission Author:
Bruno Rodrigues , SP
Co-Authors:
Bruno Rodrigues, Eugênio Spanó Rosa
Presenter: Bruno Rodrigues
doi://10.26678/ABCM.COBEM2017.COB17-0336
Abstract
A simulator for transient isothermal two-phase flow using the drift-flux model is developed employing a tenth-order compact scheme to evaluate the solution numerically, using an artificial viscosity term to stabilize the solution close to discontinuities. The model is validated against two cases: a gas-liquid shock tube problem and a transient horizontal air-water flow in a pipe. In the shock tube problem, the spurious oscillations, inherent to a central order scheme, are successfully damped at the shock discontinuity due the artificial viscosity model. The model is capable of capturing the intensity and location of shock and contact discontinuities accurately. A good agreement is verified between the proposed model and experimental data in the second test case. Pressure and void fraction wave propagation velocities are calculated from the present model and are within 7% of experimental measurements.
Keywords
drift-flux model, transient simulation, Gas-Liquid Flow, compact scheme, artificial viscosity
