scholarly journals Interface tracking method for compressible multifluids

2008 ◽  
Vol 42 (6) ◽  
pp. 991-1019 ◽  
Author(s):  
Alina Chertock ◽  
Smadar Karni ◽  
Alexander Kurganov
Keyword(s):  
Interface Tracking ◽  
Tracking Method

scholarly journals Marker Re-Distancing (MRD) Algorithm for High-Fidelity Interface Tracking on Arbitrary Meshes

2017 ◽  
Author(s):  
Patrick T. Greene ◽  
Robert Nourgaliev ◽  
Samuel P. Schofield
Keyword(s):  
Material Flow ◽  
High Order ◽  
Interface Tracking ◽  
High Fidelity ◽  
Time Step ◽  
Tracking Method ◽  
Flow Problems ◽  
Constrained Minimization Problem ◽  
Irregular Meshes ◽  
Stability Time

A new sharp high-order interface tracking method for multi-material flow problems on unstructured meshes is presented. This marker re-distancing (MRD) method is designed to work accurately and robustly on unstructured, generally highly distorted meshes, necessitated by applications within ALE-based hydrocodes. The method is a hybrid of a Lagrangian marker tracking method and a novel discontinuous Galerkin (DG) projection based level set re-distancing algorithm. The re-distancing method is formulated as a constrained minimization problem and is shown to obtain arbitrary orders of convergence for smooth interfaces. High-order (>2nd) re-distancing on irregular meshes is a must for applications were the interfacial curvature is important for the underlying physics, such as surface tension, wetting, and detonation shock dynamics. Since no PDE is solved for re-distancing, the method does not have a stability time step restriction, which is particularly useful in combination with AMR, used here to efficiently resolve fine interface features. In addition, the method can robustly handle discontinuities in the distance function without explicit utilization of solution limiters. Results will be shown for a number of different interface geometries, which will demonstrate the method’s capability of obtaining high-fidelity results on arbitrary meshes.

Numerical Simulation of the slug flow using interface tracking method

2002 ◽  
Vol 2002.3 (0) ◽  
pp. 205-206
Author(s):  
Hiroyuki YOSHIDA ◽  
Akira OHNUKI ◽  
Kazuyuki TAKASE ◽  
Hajime AKIMOTO
Keyword(s):  
Numerical Simulation ◽  
Slug Flow ◽  
Interface Tracking ◽  
Tracking Method

3523 Numerical Evaluation of Fluid Mixing Correlation for Fuel Bundle using Advanced Interface Tracking Method

2005 ◽  
Vol 2005.3 (0) ◽  
pp. 203-204
Author(s):  
Hiroyuki YOSHIDA ◽  
Naoyuki ISHIDA ◽  
Takuji NAGAYOSHI ◽  
Hajime AKIMOTO
Keyword(s):  
Numerical Evaluation ◽  
Fluid Mixing ◽  
Interface Tracking ◽  
Tracking Method ◽  
Fuel Bundle

Numerical Evaluation of Fluid Mixing Phenomena in Boiling Water Reactor Using Advanced Interface-Tracking Method

2007 ◽  
Author(s):  
Hiroyuki Yoshida ◽  
Takuji Nagayoshi ◽  
Kazuyuki Takase ◽  
Hajime Akimoto
Keyword(s):  
Two Phase Flow ◽  
Flow Simulation ◽  
Fluid Mixing ◽  
Interface Tracking ◽  
Phase Flow ◽  
Two Phase ◽  
Tracking Method ◽  
Water Reactor ◽  
Hydraulic Design ◽  
Actual Size

Thermal-hydraulic design of the current boiling water reactor (BWR) is performed by correlations with empirical results of actual-size tests. Then, for the Innovative Water Reactor for Flexible Fuel Cycle (FLWR) core, an actual size test that simulates its design is required to confirm or modify the correlations. Development of a method that enables the thermal-hydraulic design of nuclear rectors without these actual size tests is desired, because these tests take a long time and entail great cost. For this reason we developed an advanced thermal-hydraulic design method for FLWRs using innovative two-phase flow simulation technology. In this study, detailed two-phase flow simulation code using advanced interface tracking method: TPFIT is developed to get the detailed information of the two-phase flow. In this paper, firstly, we tried to verify the TPFIT code comparing with the existing 2-channel air-water mixing experimental results. Secondary, the TPFIT code was applied to simulation of steamwater two-phase flow in modeled two subchannels of current BWRs rod bundle. The fluid mixing was observed at a gap between the subchannels. The existing two-phase flow correlation for fluid mixing is evaluated using detailed numerical simulation data. From the data, pressure difference between fluid channels is responsible for the fluid mixing, and effects of the time averaged and fluctuating pressure difference must be incorporated in the two-phase flow correlation for fluid mixing.

Numerical Simulation of Microparticles Motion in Two-Phase Bubbly Flow

2020 ◽  
Author(s):  
Hiroyuki Yoshida ◽  
Shinichiro Uesawa
Keyword(s):  
Particle Tracking ◽  
Simulation Method ◽  
Interface Tracking ◽  
Liquid Interfaces ◽  
Lagrangian Particle Tracking ◽  
Lagrangian Particle ◽  
Two Phase ◽  
Tracking Method ◽  
Particle Tracking Method ◽  
Removal Equipment

Abstract The radioactive aerosol removal equipment is used as one of the safety systems of nuclear reactors. In this equipment, microparticles of aerosol are removed through gas-liquid interfaces of two-phase flow. The mechanism related to the removal of microparticles through the gas-liquid interface is not precise; a numerical evaluation method of performance of aerosol removal equipment is not realized. Then, we have started to construct a numerical simulation method to simulate the removal of microparticles through gas-liquid interfaces. In this simulation method, a detailed two-phase flow simulation code TPFIT is used as the basis of this method. TPFIT adopts an advanced interface tracking method and can simulate interface movement and deformation directly. Also, to simulate the movement of particles, the Lagrangian particle tracking method is incorporated. By combining the interface tracking method, and the Lagrangian particle tracking method, the interaction between interfaces and microparticles can be simulated in detail. To solve the Lagrangian equations of particles, fluid properties and fluid velocity surrounding aerosol particles are evaluated by considering the relative position of particles and gas-liquid interface, to simulate particle movement near the interface. In this paper, we show an outline and preliminary results of this simulation method.

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