Philip Varghese

Philip Varghese

Department of Aerospace Engineering and Engineering Mechanics

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Publications

Refereed Journal Publications (Last 5 years)

  1. Prem, P., Goldstein, D. B., Varghese, P. L., and Trafton, L. M., “Coupled DSMC-Monte Carlo Radiative Transfer Modeling of Gas Dynamics in a Transient Impact-Generated Lunar Atmosphere.” Icarus 326, 2019, pp. 88-104. doi: 10.1016/j.icarus.2019.02.036.
  2. McDoniel, W. J., Goldstein, D. B., Varghese, P. L., and Trafton, L. M. “Simulation of Io’s plumes and Jupiter’s plasma torus.” Physics of Fluids 31, 2019, 077103. doi: 10.1063/1.5097961.
  3. Mahieux, A., Goldstein, D., Varghese, P., Trafton, L., “Parametric study of water vapor and water ice particle plumes based on DSMC calculations: Application to the Enceladus geyser.” Icarus 319, 2019, pp. 729-744. doi:10.1016/j.icarus.2018.10.022.
  4. Prem, P., Hurley, D. M., Goldstein, D. B., and Varghese, P. L., “The Evolution of a Spacecraft-Generated Lunar Exosphere.” Journal of Geophysical Research: Planets 125, e2020JE006464, doi: 10.1029/2020JE006464.
  5. Poondla, Y., Tovar, S., Agrawal, A., Mahieux, A., Heldmann, J., Colaprete, A., Goldstein, D., Trafton, L., and Varghese, P., “Characterizing the hydroxyl observation of the LCROSS UV-visible spectrometer: Modeling of the impact plume.” Icarus 343, 2020, 113626. doi:10.1016/j.icarus.2020.113626.
  6. Oblapenko, G., Goldstein, D., Varghese, P., Moore, C., “A velocity space hybridization-based Boltzmann equation solver.” J. Computational Physics 408, 2020, 109302, doi: 10.1016/j.jcp.2020.109302.
  7. Haller, T. W. and Varghese, P. L., “Measurements of pressure broadening of N2 in the anisotropic tensor component of spontaneous Raman spectra,” Combustion and Flame, 2020.
  8. Ackley, P., Hoey, W., Goldstein, D., Trafton, L., and Varghese, P., “Hybrid Dust-Tracking Method for Modeling Ionian Volcanic Plume Observations.” Icarus 359, 2021,114274. doi: 10.1016/j.icarus.2020.114271.
  9. Hoey, W., Trafton, L., Ackley, P., Goldstein, D., Varghese, P., “Variations in the canopy shock structures of massive extraterrestrial plumes: Parametric DSMC simulation of the 2007 Tvashtar observations.” Icarus 363, 2021,114431. doi: 10.1016/j.icarus.2021.114431.
  10. Winters, C., Haller, T. Kearney, S., Varghese, P. Lynch, K., Daniel, K., and Wagner, J., “Pulse-Burst Spontaneous Raman Thermometry of Unsteady Wave Phenomena in a Shock Tube,” Optics Letters 46, 2021, pp. 2160-2163. doi: 10.1364/OL.420484.
  11. Oblapenko, G., Goldstein, D., Varghese, P. and Moore, C., “Velocity-space Hybridization of DSMC and a Quasi-Particle Boltzmann Solver,” J. Thermophysics and Heat Transfer 35, 2021, pp. 788-798. doi:10.2514/1.T6074.
  12. Winters, C., Haller, T. Kearney, S. Varghese P., Lynch, K. Daniel, K., and Wagner, J., “Pulse-burst spontaneous Raman thermometry of unsteady wave phenomena in a shock tube.” Optics Letters 46, 2021, pp. 2160-2163, doi: 10.1364/OL.420484.
  13. Steckloff J.K., Goldstein D., Varghese P., Trafton L., and Prem P., 2022. “Exosphere-Mediated Migration of Volatile Species on Airless Bodies Across the Solar System”. Icarus 384, 2022, 115092. doi: 1016/j.icarus.2022.115092.
  14. Poondla Y., Goldstein D., Varghese P., Clarke, P., and Moore C. “Modeling Rarefied Gas Chemistry with QuiPS, a novel quasi-particle method.” Invited paper for special issue on Hypersonics, Theoretical and Computational Fluid Dynamics 36, 2022, pp. 81-116, doi: 10.1007/s00162-021-00598-4.
  15. Oblapenko G., Goldstein D., Varghese P., and Moore C., “Hedging Direct Simulation Monte Carlo Bets via Event Splitting.” Computational Physics 466, 2022 (October), 111390. doi: 10.1016/j.jcp.2022.111390.
  16. Macias, A., Carreon, A., Berisford, D.F., Nordheim, T.A., Kale, G., Goldstein, D., Varghese, P., Trafton, L., Steckloff, J., & Hand, K. P. “Molecular Transport Conditions Required for the Formation of Penitentes on Airless, Ice-Covered Worlds, With Specific Application to Europa, Enceladus, and Callisto.” Journal of Geophysical Research: Planets 128, 2023, e2021JE007106. doi:10.1029/2021JE007106
  17. Weniger, D., Varghese, P.L., Kowalski, J., and Torrilhon, M. “Unsteady Stefan problem with kinetic interface conditions for rarefied gas deposition.” International Journal of Heat and Mass Transfer 217, (2023) 124696, doi: 10.1016/j.ijheatmasstransfer.2023.124696.
  18. Fries, D., Stark, S.T., Murray, J.S., Bhakta, R., Jans, E.R., Clemens, N.T., Varghese, P.L., Kearney, S.P. “Nitrogen thermometry in an inductively coupled plasma torch using broadband nanosecond coherent anti-Stokes Raman scattering.” Applied Optics 62, 7689 (2023). doi: 10.1364/AO.497298.
  19. Carreon, A., Macias, A., Berisford, D., Goldstein, D., Varghese, P., Trafton, L., Hand, K., Steckloff, J., and Mahieux, A. 2023. “Simulating Radiative Heat Transfer in Multi-Scattering Irregular Surfaces: Application to Snow and Ice Morphologies on Europa.” Journal of Geophysical Research: Planets 128, e2023JE007800 (2023) doi: 10.1029/2023JE007800.
  20. Macias Canizares, A., Berisford, D.F., Goldstein, D., Varghese, P., Trafton, L., Steckloff, J., Hand, K.P., “Topography formation driven by sublimation of pure species on icy airless worlds,” Icarus 415, 116403 (2024). doi: 10.1016/j.icarus.2024.116

Refereed Conference Proceedings (Last 5 years)

  1. Higdon, K., Goldstein, D., Varghese, P., “DSMC simulation of a radiating hypersonic flow.” 31st International Symposium on Rarefied Gas Dynamics, 2018, AIP Conf. Proc. 2132, 070014 (2019), doi: 10.1063/1.5119568.
  2. Poondla, Y., Varghese, P. Goldstein, D., and Higdon, K., “Modeling of chemical reactions using quasiparticle simulation (QuiPS).” 31st International Symposium on Rarefied Gas Dynamics, 2018, AIP Conf. Proc. 2132, 140002 (2019), doi: 10.1063/1.5119636.

Non-Refereed Conference Proceedings (Last 5 years)

  1. Oblapenko, G., Goldstein, D., Varghese, P. and Moore, C., “Velocity-space Hybridization of DSMC and a Boltzmann Solver.” Paper No. 2020-1063, AIAA SciTech Forum, Orlando, FL, January 2020. doi: 10.2514/6.2020-1063.
  2. Winters, C., Kearney, S., Wagner, J., Haller, T., and Varghese, P., “Burst-Mode Spontaneous Raman Thermometry in a Flat Flame,” Paper 2020-0518, AIAA SciTech Forum, Orlando, FL, January 2020. doi: 10.2514/6.2020-0518
  3. Oblapenko, G., Goldstein, D., Varghese, P. and Moore, C., “Modeling of Ionized Gas Flows with a Velocity-space Hybrid Boltzmann Solver,” Paper 2021-0705, AIAA SciTech Forum, January 2021. doi: 10.2514/6.2021-0705.
  4. Winters, C., Kearney, S., Wagner, J., Haller, T., and Varghese P., “Burst-Mode Spontaneous Raman Thermometry in a Flat Flame.” Paper 2020-0518, AIAA SciTech Forum, Orlando, FL, January 2020. doi: 10.2514/6.2020-0518
  5. Oblapenko, G., Goldstein D., Varghese P., Moore C., 2021. “An Event Splitting Collision Scheme for PIC-DSMC Simulations.” STAB-Workshop, 16-17 November, Göttingen, Germany.
  6. Oblapenko, G., Goldstein D., Varghese P., and Moore C., “Modelling of Unsteady Ionized Flows Using a Velocity-Space Hybridization of DSMC and a Quasi-Particle Solver”, 73rdAnnual Meeting of the APS Division of Fluid Dynamics, November 2020.
  7. Oblapenko, G., Goldstein D., Varghese P., and Moore C., “Modeling of Ionized Gas Flows with a Velocity-space Hybrid Boltzmann Solver.” Paper 2021-0705, AIAA SciTech Forum, January 2021. doi: 10.2514/6.2021-0705.
  8. Oblapenko, G., Goldstein D., Varghese P., and Moore C., “Improving PIC-DSMC Simulations of Electrical Breakdown via Event Splitting.” Paper No. 2022-2152, AIAA SciTech Forum, January 2022. doi.org/10.2514/6.2022-2152.
  9. Fries, D., Clemens, N.T., Varghese, P.L. “Time Dynamics of an Inductively Coupled Plasma Torch.” Paper No. 2022-0984, AIAA SciTech Forum, January 2022. doi.org/10.2514/6.2022-0984.
  10. Mahieux A., Goldstein D.B., Varghese P.L., Trafton L.M., “Constraining the Enceladus Geyser Using the Markov Chain Monte Carlo Algorithm and DSMC Simulations”, Paper #1282, 53rd Lunar and Planetary Science Conference, Houston, TX, March 2022.
  11. Oblapenko G., Goldstein D., Varghese P., Moore C..” 2022. “Improving PIC-DSMC Simulations of RF Plasmas via Event Splitting.” EUCASS-3AF 2022, Lille, France, 27 June – 01 July, 2022, doi: 10.13009/EUCASS2022-6130.
  12. Fries, D., Stark, S.T., Murray, J.S., Clemens, N., Varghese, P.L., Bhakta, R., Jans, E.R., Kearney, S. “CARS in an Inductively Coupled Plasma Torch, Part 1: High Temperature Nitrogen Thermometry.” Paper No. 2023-0167, AIAA SciTech Forum, January 2023. doi.org/10.2514/6.2023-0167.
  13. Kearney, S., Bhakta, R., Fries, D., Murray, J.S., Stark, S.T., Clemens, N., Varghese, P.L., “CARS in an Inductively Coupled Plasma Torch, Part 2: CARS in an Inductively Coupled Plasma Torch, Part 2: Temperature and Carbon-Monoxide Measurements in the Reaction Layer of a Graphite Ablator” Paper No. 2023-0168, AIAA SciTech Forum, January 2023. doi.org/10.2514/6.2023-0168.
  14. Fries, D., Stark, S.T., Murray, J.S., Clemens, N., Varghese, P.L., Bhakta, R., Kearney, S. “Nanosecond CARS Measurements of Temperature and Relative CO Concentration in the Boundary Layer of a Graphite Ablator in an Inductively Coupled Plasma Torch.” Paper No. 2024-0446, AIAA SciTech Forum, January 2024. doi.org/10.2514/6.2024-0446.
  15. Neal, J.M., Nair, S., Tiwari, A., Moreno, A., Underwood, T., Goldstein, D.B., Varghese, P. “Computational and Experimental Investigation of Plume Impingement for Orbital Detumbling,” Paper 2024-4208, AIAA Aviation Forum and Ascend 2024, August 2024. doi:10.2514/6.2024-4208.

CONTACT

Email: varghese@mail.utexas.edu

Phone: (512) 471-3110

Office: ASE 4.222

© Philip Varghese 2020

Department of Aerospace Engineering and Engineering Mechanics

Cockrell School of Engineering

The University of Texas at Austin

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