Experimental and numerical investigation of reactive shock-accelerated flows

Bonazza, Riccardo

doi:10.2172/1336609

Title: Experimental and numerical investigation of reactive shock-accelerated flows

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Abstract

The main goal of this program was to establish a qualitative and quantitative connection, based on the appropriate dimensionless parameters and scaling laws, between shock-induced distortion of astrophysical plasma density clumps and their earthbound analog in a shock tube. These objectives were pursued by carrying out laboratory experiments and numerical simulations to study the evolution of two gas bubbles accelerated by planar shock waves and compare the results to available astrophysical observations. The experiments were carried out in an vertical, downward-firing shock tube, 9.2 m long, with square internal cross section (25×25 cm²). Specific goals were to quantify the effect of the shock strength (Mach number, M) and the density contrast between the bubble gas and its surroundings (usually quantified by the Atwood number, i.e. the dimensionless density difference between the two gases) upon some of the most important flow features (e.g. macroscopic properties; turbulence and mixing rates). The computational component of the work performed through this program was aimed at (a) studying the physics of multi-phase compressible flows in the context of astrophysics plasmas and (b) providing a computational connection between laboratory experiments and the astrophysical application of shock-bubble interactions. Throughout the study, we used the FLASH4.2 code tomore »« less

Authors:

Bonazza, Riccardo ^[1]

Univ. of Wisconsin, Madison, WI (United States). Dept. of Engineering Physics

Publication Date:: Tue Dec 20 00:00:00 EST 2016

Research Org.:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

OSTI Identifier:: 1336609

Report Number(s):: DOE-Wisconsin-0010730-F
6082652337; TRN: US1701407

DOE Contract Number:: SC0010730

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; COMPUTERIZED SIMULATION; ASTROPHYSICS; PLASMA DENSITY; SCALING LAWS; BUBBLES; COMPRESSIBLE FLOW; MACH NUMBER; SHOCK TUBES; GASES; MULTIPHASE FLOW; SHOCK WAVES; TIME DEPENDENCE; MIXING; TURBULENCE; MAGNETOHYDRODYNAMICS; HYDRODYNAMICS; COSMIC GASES; Shock-driven turbulence; Astrophysical shocks; Astrophysical plasmas; Density clumps; Shock-accelerated inhomogeneous flows

Citation Formats


                    Bonazza, Riccardo. Experimental and numerical investigation of reactive shock-accelerated flows.  United States: N. p., 2016. 
        Web.  doi:10.2172/1336609.

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                    Bonazza, Riccardo. Experimental and numerical investigation of reactive shock-accelerated flows.  United States.  https://doi.org/10.2172/1336609

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                    Bonazza, Riccardo. 2016.  
        "Experimental and numerical investigation of reactive shock-accelerated flows".  United States.  https://doi.org/10.2172/1336609.  https://www.osti.gov/servlets/purl/1336609.

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@article{osti_1336609,

  title        = {Experimental and numerical investigation of reactive shock-accelerated flows},

  author       = {Bonazza, Riccardo},

  abstractNote = {The main goal of this program was to establish a qualitative and quantitative connection, based on the appropriate dimensionless parameters and scaling laws, between shock-induced distortion of astrophysical plasma density clumps and their earthbound analog in a shock tube. These objectives were pursued by carrying out laboratory experiments and numerical simulations to study the evolution of two gas bubbles accelerated by planar shock waves and compare the results to available astrophysical observations. The experiments were carried out in an vertical, downward-firing shock tube, 9.2 m long, with square internal cross section (25×25 cm2). Specific goals were to quantify the effect of the shock strength (Mach number, M) and the density contrast between the bubble gas and its surroundings (usually quantified by the Atwood number, i.e. the dimensionless density difference between the two gases) upon some of the most important flow features (e.g. macroscopic properties; turbulence and mixing rates). The computational component of the work performed through this program was aimed at (a) studying the physics of multi-phase compressible flows in the context of astrophysics plasmas and (b) providing a computational connection between laboratory experiments and the astrophysical application of shock-bubble interactions. Throughout the study, we used the FLASH4.2 code to run hydrodynamical and magnetohydrodynamical simulations of shock bubble interactions on an adaptive mesh.},

  doi          = {10.2172/1336609},

  url          = {https://www.osti.gov/biblio/1336609},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Dec 20 00:00:00 EST 2016},

  month        = {Tue Dec 20 00:00:00 EST 2016}

}

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https://doi.org/10.2172/1336609

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