Investigation of axisymmetric wave flows under interaction of a spherical impact pulse with a barrier of aqueous foam

The problem of spherical explosion in the gas region with a protective foam layer is solved in a two-dimensional axisymmetric formulation using a two-phase model of a gas-liquid mixture that includes the laws of conservation of mass, momentum and energy of the mixture and the equation for the dynamics of the volume content of phases. The numerical implementation of the model was carried out by modifying the standard solver of the compressibleMultiphaseInterFoam of the open package OpenFOAM. The results of computer modeling are visualized using the ParaView graphical platform.

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The Numerical Modeling of Spherical Explosion in the Foam

Proceedings of the Mavlyutov Institute of Mechanics ◽

10.21662/uim2016.1.009 ◽

2016 ◽

Vol 11 (1) ◽

pp. 60-65 ◽

Cited By ~ 3

Author(s):

R.Kh. Bolotnova ◽

E.F. Gainullina

Keyword(s):

Shock Wave ◽

Numerical Modeling ◽

Initial Pressure ◽

Water Volume ◽

Symmetric Model ◽

Two Phase ◽

Experimental Conditions ◽

Initial Water ◽

Aqueous Foam ◽

Spherical Explosion

The spherical explosion propagation process in aqueous foam with the initial water volume content α10=0.0083 corresponding to the experimental conditions is analyzed numerically. The solution method is based on the one-dimensional two-temperature spherically symmetric model for two-phase gas-liquid mixture. The numerical simulation is built by the shock capturing method and movable Lagrangian grids. The amplitude and the width of the initial pressure pulse are found from the amount of experimental explosive energy. The numerical modeling results are compared to the real experiment. It’s shown, that the foam compression in the shock wave leads to the significant decrease in velocity and in amplitude of the shock wave.

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Features of spatial shock-wave flows in vapor-gas-liquid mixtures

Proceedings of the Mavlyutov Institute of Mechanics ◽

10.21662/uim2014.1.005 ◽

2014 ◽

Vol 10 ◽

pp. 27-31

Author(s):

R.Kh. Bolotnova ◽

U.O. Agisheva ◽

V.A. Buzina

Keyword(s):

Shock Wave ◽

High Pressure ◽

Shock Waves ◽

Liquid Mixture ◽

Liquid Mixtures ◽

Pressure Vessels ◽

Water Mixture ◽

Two Dimensional ◽

Nonstationary Processes ◽

Two Phase

The two-phase model of vapor-gas-liquid medium in axisymmetric two-dimensional formulation, taking into account vaporization is constructed. The nonstationary processes of boiling vapor-water mixture outflow from high-pressure vessels as a result of depressurization are studied. The problems of shock waves action on filled by gas-liquid mixture volumes are solved.

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Investigation of two-dimensional nonstationary processes of outflow a gas-saturated liquid from axisymmetric vessels

Proceedings of the Mavlyutov Institute of Mechanics ◽

10.21662/uim2012.1.008 ◽

2012 ◽

Vol 9 (1) ◽

pp. 47-52

Author(s):

R.Kh. Bolotnova ◽

V.A. Buzina

Keyword(s):

Comparative Analysis ◽

Numerical Model ◽

Liquid Mixture ◽

Phase Model ◽

Test Problems ◽

Two Dimensional ◽

Nonstationary Processes ◽

Saturated Liquid ◽

Two Phase ◽

One Dimensional

The two-dimensional and two-phase model of the gas-liquid mixture is constructed. The validity of numerical model realization is justified by using a comparative analysis of test problems solution with one-dimensional calculations. The regularities of gas-saturated liquid outflow from axisymmetric vessels for different geometries are established.

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Modeling of weak shock waves propagation in aqueous foam layer

Journal of Physics Conference Series ◽

10.1088/1742-6596/2103/1/012217 ◽

2021 ◽

Vol 2103 (1) ◽

pp. 012217

Author(s):

R Kh Bolotnova ◽

E F Gainullina

Keyword(s):

Shock Waves ◽

Equations Of State ◽

Weak Shock ◽

Foam Layer ◽

Contact Heat ◽

Two Phase ◽

Aqueous Foam ◽

Proposed Model ◽

Waves Propagation ◽

Two Temperature

Abstract Dynamics of low-intensity air shock waves in the shock tube containing an aqueous foam layer is theoretically investigated. Modeling of studied process is carried out using two-phase model of aqueous foam developed by the authors in single-pressure, single-speed and two-temperature approximations. The model takes into account the Ranz-Marshall interphase contact heat transfer, effective Herschel-Bulkley viscosity, which describes foam behavior as a non-Newtonian fluid, and elastic properties of aqueous foam under a weak shock impaction without destruction of foam structure. Properties of air and water as the foam components are described by realistic equations of state. Computer implementation of the aqueous foam model is carried out in the solver, developed by the authors in OpenFOAM software. The influence of aqueous foam viscoelastic properties on the intensity and structure of a shock wave has been investigated. When analyzing the obtained solutions, reliability of the proposed model and method of numerical modeling is estimated by comparative analysis of the found solutions and literature experimental data.

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Fluid Flow and Heat Transfer of the Two-Phase Solid/Liquid Mixture at the Equilibration Phase Structure via MD Method: Atomic Value Effects in a Case Study of Energy Consumption and Absorbed Energy

Journal of Molecular Liquids ◽

10.1016/j.molliq.2021.116384 ◽

2021 ◽

pp. 116384

Author(s):

Nidal H. Abu-Hamdeh ◽

Radi A. Alsulami ◽

Ashkan Alimoradi ◽

Arash Karimipour

Keyword(s):

Heat Transfer ◽

Fluid Flow ◽

Energy Consumption ◽

Phase Structure ◽

Liquid Mixture ◽

Absorbed Energy ◽

Two Phase ◽

Flow And Heat Transfer ◽

Solid Liquid

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Two-phase solid/liquid mixture of water/carbon nanotubes at the equilibration phase of atomic structures: Atomic value effects in a microchannel using the Molecular Dynamics method

Journal of Molecular Liquids ◽

10.1016/j.molliq.2021.116820 ◽

2021 ◽

pp. 116820

Author(s):

Mostafa Naderi ◽

Arash Karimipour

Keyword(s):

Carbon Nanotubes ◽

Molecular Dynamics ◽

Liquid Mixture ◽

Molecular Dynamics Method ◽

Two Phase ◽

Atomic Structures ◽

Solid Liquid ◽

Dynamics Method

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Numerical Analysis of Two-Phase Pipe Flow of Liquid Helium Using Multi-Fluid Model

Journal of Fluids Engineering ◽

10.1115/1.1400747 ◽

2001 ◽

Vol 123 (4) ◽

pp. 811-818 ◽

Cited By ~ 6

Author(s):

Jun Ishimoto ◽

Mamoru Oike ◽

Kenjiro Kamijo

Keyword(s):

Phase Transition ◽

Gas Phase ◽

Liquid Helium ◽

Two Phase Flow ◽

Fluid Model ◽

Numerical Results ◽

Phase Flow ◽

Two Dimensional ◽

Two Phase ◽

Normal Fluid

The two-dimensional characteristics of the vapor-liquid two-phase flow of liquid helium in a pipe are numerically investigated to realize the further development and high performance of new cryogenic engineering applications. First, the governing equations of the two-phase flow of liquid helium based on the unsteady thermal nonequilibrium multi-fluid model are presented and several flow characteristics are numerically calculated, taking into account the effect of superfluidity. Based on the numerical results, the two-dimensional structure of the two-phase flow of liquid helium is shown in detail, and it is also found that the phase transition of the normal fluid to the superfluid and the generation of superfluid counterflow against normal fluid flow are conspicuous in the large gas phase volume fraction region where the liquid to gas phase change actively occurs. Furthermore, it is clarified that the mechanism of the He I to He II phase transition caused by the temperature decrease is due to the deprivation of latent heat for vaporization from the liquid phase. According to these theoretical results, the fundamental characteristics of the cryogenic two-phase flow are predicted. The numerical results obtained should contribute to the realization of advanced cryogenic industrial applications.

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