Recommended direct simulation Monte Carlo collision model parameters for modeling ionized air transport processes

Swaminathan-Gopalan, Krishnan

doi:10.1063/1.4939719

Title: Recommended direct simulation Monte Carlo collision model parameters for modeling ionized air transport processes

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Abstract

A systematic approach for calibrating the direct simulation Monte Carlo (DSMC) collision model parameters to achieve consistency in the transport processes is presented. The DSMC collision cross section model parameters are calibrated for high temperature atmospheric conditions by matching the collision integrals from DSMC against ab initio based collision integrals that are currently employed in the Langley Aerothermodynamic Upwind Relaxation Algorithm (LAURA) and Data Parallel Line Relaxation (DPLR) high temperature computational fluid dynamics solvers. The DSMC parameter values are computed for the widely used Variable Hard Sphere (VHS) and the Variable Soft Sphere (VSS) models using the collision-specific pairing approach. The recommended best-fit VHS/VSS parameter values are provided over a temperature range of 1000-20 000 K for a thirteen-species ionized air mixture. Use of the VSS model is necessary to achieve consistency in transport processes of ionized gases. The agreement of the VSS model transport properties with the transport properties as determined by the ab initio collision integral fits was found to be within 6% in the entire temperature range, regardless of the composition of the mixture. The recommended model parameter values can be readily applied to any gas mixture involving binary collisional interactions between the chemical species presented for themore » specified temperature range.« less

Authors:: Swaminathan-Gopalan, Krishnan

Publication Date:: Mon Feb 15 00:00:00 EST 2016

OSTI Identifier:: 22482496

Resource Type:: Journal Article

Journal Name:: Physics of Fluids (1994)

Additional Journal Information:: Journal Volume: 28; Journal Issue: 2; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-6631

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AIR TRANSPORT; ALGORITHMS; COLLISION INTEGRALS; COLLISIONS; COMPUTERIZED SIMULATION; FLUID MECHANICS; MIXTURES; MONTE CARLO METHOD; RELAXATION

Citation Formats


                    Swaminathan-Gopalan, Krishnan, and Stephani, Kelly A., E-mail: ksteph@illinois.edu. Recommended direct simulation Monte Carlo collision model parameters for modeling ionized air transport processes.  United States: N. p., 2016. 
        Web.  doi:10.1063/1.4939719.

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                    Swaminathan-Gopalan, Krishnan, & Stephani, Kelly A., E-mail: ksteph@illinois.edu. Recommended direct simulation Monte Carlo collision model parameters for modeling ionized air transport processes.  United States.  https://doi.org/10.1063/1.4939719

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                    Swaminathan-Gopalan, Krishnan, and Stephani, Kelly A., E-mail: ksteph@illinois.edu. 2016.  
        "Recommended direct simulation Monte Carlo collision model parameters for modeling ionized air transport processes".  United States.  https://doi.org/10.1063/1.4939719.

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@article{osti_22482496,

  title        = {Recommended direct simulation Monte Carlo collision model parameters for modeling ionized air transport processes},

  author       = {Swaminathan-Gopalan, Krishnan and Stephani, Kelly A., E-mail: ksteph@illinois.edu},

  abstractNote = {A systematic approach for calibrating the direct simulation Monte Carlo (DSMC) collision model parameters to achieve consistency in the transport processes is presented. The DSMC collision cross section model parameters are calibrated for high temperature atmospheric conditions by matching the collision integrals from DSMC against ab initio based collision integrals that are currently employed in the Langley Aerothermodynamic Upwind Relaxation Algorithm (LAURA) and Data Parallel Line Relaxation (DPLR) high temperature computational fluid dynamics solvers. The DSMC parameter values are computed for the widely used Variable Hard Sphere (VHS) and the Variable Soft Sphere (VSS) models using the collision-specific pairing approach. The recommended best-fit VHS/VSS parameter values are provided over a temperature range of 1000-20 000 K for a thirteen-species ionized air mixture. Use of the VSS model is necessary to achieve consistency in transport processes of ionized gases. The agreement of the VSS model transport properties with the transport properties as determined by the ab initio collision integral fits was found to be within 6% in the entire temperature range, regardless of the composition of the mixture. The recommended model parameter values can be readily applied to any gas mixture involving binary collisional interactions between the chemical species presented for the specified temperature range.},

  doi          = {10.1063/1.4939719},

  url          = {https://www.osti.gov/biblio/22482496},
  journal      = {Physics of Fluids (1994)},

  issn         = {1070-6631},

  number       = 2,

  volume       = 28,

  place        = {United States},

  year         = {Mon Feb 15 00:00:00 EST 2016},

  month        = {Mon Feb 15 00:00:00 EST 2016}

}

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