TY - GEN
T1 - Numerical simulation of mixing zone growth between two fluids under acceleration
AU - Adam, Carlton
AU - Hadim, Hamid
N1 - Publisher Copyright:
© 2019 Begell House Inc. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Numerical simulations are performed on the propulsion of a liquid slug which is driven through a tube by a gas at high pressure (10 MPa). A 2D axisymmetric CFD model is used to study the evolution of a turbulent mixing zone between the slug and the air, which forms due to Rayleigh-Taylor instability (RTI) caused by the relative difference in density between the slug and the driver gas. The dependency of the mixing zone growth rate on several parameters such as fluid type (density, viscosity), and pipe diameter is analyzed by performing several parametric simulations. Over the range of fluids simulated in the model, the Atwood number varies from 0.75 to 0.80 while the Reynolds number varies from approximately 103 to 106. The model shows that the mixing zone growth rate is sensitive to both the type of fluid and the aspect ratio of the fluid slug.
AB - Numerical simulations are performed on the propulsion of a liquid slug which is driven through a tube by a gas at high pressure (10 MPa). A 2D axisymmetric CFD model is used to study the evolution of a turbulent mixing zone between the slug and the air, which forms due to Rayleigh-Taylor instability (RTI) caused by the relative difference in density between the slug and the driver gas. The dependency of the mixing zone growth rate on several parameters such as fluid type (density, viscosity), and pipe diameter is analyzed by performing several parametric simulations. Over the range of fluids simulated in the model, the Atwood number varies from 0.75 to 0.80 while the Reynolds number varies from approximately 103 to 106. The model shows that the mixing zone growth rate is sensitive to both the type of fluid and the aspect ratio of the fluid slug.
KW - CFD
KW - Multiphase
KW - Numerical simulation
KW - Rayleigh-Taylor instability
KW - Turbulence
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U2 - 10.1615/TFEC2019.cfd.028147
DO - 10.1615/TFEC2019.cfd.028147
M3 - Conference contribution
AN - SCOPUS:85081579209
T3 - Proceedings of the Thermal and Fluids Engineering Summer Conference
SP - 1495
EP - 1500
BT - 4th Thermal and Fluids Engineering Conference, TFEC 2019
T2 - 4th Thermal and Fluids Engineering Conference, TFEC 2019
Y2 - 14 April 2019 through 17 April 2019
ER -