Example of Application: Bubbly Flow in a Vertical Pipe

2015 ◽  
pp. 279-310
Author(s):  
Christophe Morel
Keyword(s):  
Bubbly Flow ◽  
Vertical Pipe

scholarly journals KARAKTERISITIK FLOW PATERN PADA ALIRAN DUA FASE GAS-CAIRAN MELEWATI PIPA VERTIKAL

2012 ◽  
Vol 11 (2) ◽  
pp. 117
Author(s):  
PRIYO HERU ADIWIBOWO
Keyword(s):  
Flow Pattern ◽  
Power Plants ◽  
Bubbly Flow ◽  
Digital Camera ◽  
Vertical Pipe ◽  
Two Phase ◽  
Pressurized Water ◽  
Industrial Facilities ◽  
Multi Phase ◽  
Pattern Visualization

Multi-phase flows are widely encountered in several engineering and industrial facilities, such as conventional steam power  plants, evaporators and condensers, pressurized-water nuclear reactors, a wide variety of petroleum industries, chemicals and  food processing industries. Surely, in the complex pipeline  installation of these systems, vertical pipe will be commonly  used for pipe connection. The purpose of this work is to investigate the flow pattern of gas-liquid two phase in the vertical pipe. Experiments will be performed in a 36 mm ID  acrylic pipe vertical. Superifical liquid velocities and volumetric gas quality will be varied 0.3~1,1 m/s and 0.05~0.2 respectively. Digital camera will be used for flow pattern  visualization in the vertical pipe. It was observed that effect of vertical pipe on flow pattern formed cluster bubbly flow for low volumetric gas quality with high superifical liquid velocities. For  superifical liquid velocities with medium volumetric gas quality formed homogeneous bubbly flow and high volumetric gas quality is dense bubbly flow.

scholarly journals Void Fraction Distribution of Upward Bubbly Flow in a Vertical Pipe with Sudden Expansion

2005 ◽  
Vol 71 (703) ◽  
pp. 796-803 ◽  
Author(s):  
Koichi KONDO ◽  
Kenji YOSHIDA ◽  
Tadayoshi MATSUMOTO ◽  
Tomio OKAWA ◽  
Isao KATAOKA
Keyword(s):  
Void Fraction ◽  
Bubbly Flow ◽  
Sudden Expansion ◽  
Vertical Pipe ◽  
Void Fraction Distribution ◽  
Fraction Distribution

Local parameter measurement of bubbly flow in vertical pipe by using Wire Mesh Tomography

2004 ◽  
Vol 2004.2 (0) ◽  
pp. 261-262
Author(s):  
N. Fuangworawong ◽  
W. Wangjiraniran ◽  
H. Muragawa ◽  
H. Kikura ◽  
M. Aritomi
Keyword(s):  
Bubbly Flow ◽  
Wire Mesh ◽  
Parameter Measurement ◽  
Local Parameter ◽  
Vertical Pipe

Phase Distribution of Upward Bubbly Flow through a Vertical Pipe with Sudden Expansion

2002 ◽  
Vol 2002 (0) ◽  
pp. 249-250
Author(s):  
Koichi KONDO ◽  
Kenji YOSHIDA ◽  
Tadayoshi MATSUMOTO ◽  
Tomio OKAWA ◽  
Isao KATAOKA
Keyword(s):  
Phase Distribution ◽  
Bubbly Flow ◽  
Sudden Expansion ◽  
Vertical Pipe ◽  
Flow Through

CFD Modeling of Subcooled Boiling in Vertical Bubbly Flow Condition Using ANSYS CFX 12

2010 ◽  
Author(s):  
Filippo Pellacani ◽  
Silvana Matturro Mestre ◽  
Sergio Chiva Vicent ◽  
Rafael Macian Juan
Keyword(s):  
Void Fraction ◽  
Lift Force ◽  
Bubbly Flow ◽  
Cfd Modeling ◽  
Computational Domain ◽  
Subcooled Boiling ◽  
Vertical Pipe ◽  
Mean Values ◽  
Drag Forces ◽  
Ansys Cfx

Subcooled boiling in upward non-isothermal turbulent bubbly flow in tubes is numerically modeled using ANSYS-CFX 12 in this contribution. The approach is based on the RPI wall boiling model developed by Kurul and Podowski [1]. The interfacial non-drag forces are also investigated and included in the model. The Antal [5] model with different coefficients is used for the wall lubrication force. The lift force was calculated in two ways, with the Tomiyama model [4] and based on a constant value. The void fraction axial profiles for high pressure subcooled boiling in tubes are compared against the experimental data of Bartolomej [17] [18]. The pressure varies from 3 up to 6.89 MPa and the wall heat flux from 0.38 to 1.2 MW m−2. The mass flux range is between 900 and 1500 kg s−1m−2. The computational domain has up to 70000 nodes, and represents one eighth of a vertical pipe. In general, the models give predictions in close agreement with experimental results if the axial mean values are considered. The main difficulties for the simulation are observed for flow in transition to flow regimes with high void fraction, when the bubbly flow is not able to maintain the spherical condition of the bubbles, which is a requirement of the boiling models.

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