Simulation of the Coalescence of two Bubbles Rising in a Vertical Pipe with VOF Interface Tracking Method

2007 ◽  
Author(s):  
Djemai Merrouche ◽  
Kamal Mohammedi ◽  
Idir Belaidi ◽  
Bachir Mabrouki
Keyword(s):  
Interface Tracking ◽  
Vertical Pipe ◽  
Tracking Method ◽  
Two Bubbles

An Interface Tracking Method Based on Volume Tracking in Embedded Micro Cells

2002 ◽  
Author(s):  
Akio Tomiyama ◽  
Yusuke Nakahara ◽  
Satoru Abe
Keyword(s):  
Surface Tension ◽  
Density Ratio ◽  
Surface Tension Force ◽  
Interface Tracking ◽  
Air Bubbles ◽  
Interface Thickness ◽  
Vertical Pipe ◽  
Stagnant Water ◽  
Tracking Method ◽  
High Density Ratio

An interface tracking method based on volume tracking in micro cells embedded in regular cells is proposed. The volume tracking is based on a CIP scheme, which yields extremely sharp and jaggy interface in micro cells. However, in regular cells, the jagged interface is smoothed and the interface thickness becomes comparable to a regular cell size Δx. Single air bubbles in stagnant water and single large air bubbles in stagnant water filled in a vertical pipe are simulated with the proposed method. As a result, it is confirmed that (1) the proposed method conserves bubble volumes, (2) the interface thickness around a bubble is kept within 2Δx, and thereby the surface tension force is well evaluated by the CSF model, and (3) the method can give good predictions for bubbles in a high density-ratio system.

Interface Tracking Simulation of Mass Transfer From a Dissolving Bubble

2011 ◽  
Author(s):  
Kosuke Hayashi ◽  
Akio Tomiyama
Keyword(s):  
Carbon Dioxide ◽  
Mass Transfer ◽  
Volume Change ◽  
Empirical Models ◽  
Interface Tracking ◽  
Vertical Pipe ◽  
Transfer Coefficients ◽  
Species Concentration ◽  
Tracking Method ◽  
Benchmark Tests

An interface tracking method for predicting bubble dissolution process is proposed. A non-diffusive scheme for advecting species concentrations is adopted to accurately compute the volume change due to mass transfer. The applicability of the proposed method is examined through several benchmark tests, i.e. mass transfer from a static bubble and that from free rising bubbles. Predicted species concentration distributions and mass transfer coefficients agree well with theoretical and empirical models. Dissolution of single carbon dioxide bubbles in a vertical pipe filled with water is also simulated. The bubbles consist only of carbon dioxide, and nitrogen and oxygen are initially dissolved in water. The volume change due to dissolution of carbon dioxide from the bubbles and evaporation of nitrogen and oxygen from water are well predicted.

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.

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

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
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