Direct numerical simulation of incompressible multiphase flow with phase change

JOURNAL OF COMPUTATIONAL PHYSICS

卷:344

Article

Lee, Moon Soo¹  Riaz, Amir¹  Aute, Vikrant¹ 

[1] Univ Maryland, Dept Mech Engn, College Pk, MD 20742 USA

关键词: Multiphase flow;    Phase change;    Level set method;    Velocity jump conditions;   

DOI  :  10.1016/j.jcp.2017.04.073

来源: Elsevier

【 摘 要 】

Simulation of multiphase flow with phase change is challenging because of the potential for unphysical pressure oscillations, spurious velocity fields and mass flux errors across the interface. The resulting numerical errors may become critical when large density contrasts are present. To address these issues, we present a new approach for multiphase flow with phase change that features, (i) a smooth distribution of sharp velocity jumps and mass flux within a narrow region surrounding the interface, (ii) improved mass flux projection from the implicit interface onto the uniform Cartesian grid and (iii) post-advection velocity correction step to ensure accurate velocity divergence in interfacial cells. These new features are implemented in combination with a sharp treatment of the jumps in pressure and temperature gradient. A series of 1-D, 2-D, axisymmetric and 3-D problems are solved to verify the improvements afforded by the new approach. Axisymmetric film boiling results are also presented, which show good qualitative agreement with heat transfer correlations as well as experimental observations of bubble shapes. (C) 2017 Elsevier Inc. All rights reserved.

【 授权许可】

Free