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Hari S. Viswanathan

Hari Viswanathan

Email
Phone (505) 665-6737

Capabilities

  • Computational Physics and Applied Mathematics
  • Applied Math
  • Earth and Space Sciences
  • Subsurface flow and transport
  • Hydrology
  • Geochemistry
  • Computer and Computational Sciences
  • Machine learning,
  • Earth and Space Sciences
  • PFLOTRAN
  • Information Science and Technology
  • Machine Learning
  • Network dynamics

Expertise

1. Subsurface flow and transport modeling

2. Flow in porous media and fractured systems, fracture propagation, reactive transport modeling

3. Applications include: hydraulic fracturing, carbon sequestration, radionuclide transport, nuclear nonproliferation and brittle fracture.

Education

B.S., Chemical Engineering with Honors, University of California, Santa Barbara (1993)

M.S., Ph.D., Environmental Engineering, University of Illinois, Urbana-Champaign (1995,1999)

 

LANL Positions

Subsurface Flow and Transport Team Leader, Computational Earth Science (EES-16)

Scientist 4

 

Professional Societies

American Geophysical Union

American Chemical Society

 

Awards

Esmilla writing award for masters thesis

2001 LANL distinguished performance award

2013 LAAP award for hydraulic fracturing efforts

2017 Fellow of Geological Society of America

2017 dfnWork R&D 100 award winner

 

Publications

  1. Viswanathan, H.S., J. D. Hyman, S. Karra, D. O’Malley, S. Srinivasan, A. Hagberg, and G. Srinivasan. Advancing graph-based algorithms for predicting flow and transport in fractured rock. Submitted to Water Resour. Res., 2018.
  2. G. Aldrich, J. Lukasczyk, J.D. Hyman, G. Srinivasan, H. Viswanathan, H. Leitte, J. Ahrens, B. Hamann A Query-based Framework for Searching, Sorting, and Exploring Data Ensembles, submitted to IEEE Computing in science and engineering, 2018.  
  3. E. Lovell, S. Srinivasan, S. Karra, D. O’Malley, N. Makedonska, H. S. Viswanathan, G. Srinivasan, J. W. Carey, and L. P. Frash. Extracting hydrocarbon from shale: An investigation of the factors that influence the decline and the tail of the production curve. Water Resources Research, 2017.
  4. O’Malley, S. Karra, J. D. Hyman, H. Viswanathan, and G. Srinivasan. Efficient monte carlo with graph-based subsurface flow and transport models. Water Resour. Res., 2017.
  5. Srinivasan, J. D. Hyman, D. Osthus, B. Moore, D. O’Malley, S. Karra, E Rougier, A. Hagberg, A. Hunter, and H. S. Viswanathan. Quantifying topological uncertainty in fractured systems using graph theory and machine learning. Scientific Reports, 2017. 
  6. Zhao,  J., Kang, Q., Pawar, R., Viswanathan, H.S., The Effect of Wettability Heterogeneity on Relative Permeability of Two-phase Flow in Porous Media: A Lattice Boltzmann Study, submitted to Water Resources Research.
  7. Karra, S., O’Malley, D. O., Hyman, J.D., Viswanathan, H.S., Srinivasan, G., Modeling flow and transport in fracture networks using graphs, submitted to PRE.
  8. J. D. Hyman, J.W. Carey, S. Karra, C.W. Gable, H. Viswanathan, E. Rougier, and Z. Lei. Discontinuities in effective permeability due to fracture percolation, accepted to Mechanics of Materials, 2018. 
  9. Miller, R., Moore, B. Viswanathan, H., Srinivasan, G., Image analysis using Convolution Neural Networks for Modeling Fracture Propagation, IEEE International Conference on Data Mining.
  10. Valera, M., Guo, Z., Kelly, P., Matz, S., Cantu, A., Percus, A.G., Hyman, J.D., Srinivasan, G., Viswanathan., H.,  Machine learning for graph-based representations of three-dimensional discrete fracture networks, accepted Computers and Geosciences.
  11. Zhang, Y., Zeng, Z., Dai, Z., Viswanathan, H.S., Xiao, T., Ma, Y., Feng, X., Experimental investigation on oil migration and accumulation in tight sandstones, Journal of of Petroleum Science and Engineering, vol 160, pp. 267-275, 2018.
  12. Mudunuru, M.K., Karra, S., Harp, D.R.,  Guthrie, G.D., Viswanathan, H.S., Regression-based reduced-order models to predict transient thermal output for enhanced geothermal systems, Geothermics, Vol. 70, pp. 192-205, 2017.
  13. Xiao, T., Dai, Z., McPherson, B., Viswanathan, H.S., Jia, W., Reactive transport modeling of arsenic mobilization in shallow groundwater: Impacts of CO2 and brine leakage, Geomechanics and Geophysics for Geo-Energy and Geo-Resources, vol 3., pp. 339-350, 2017.
  14. Hadgu, T., Karra, S., Kalinina, E., Makedonska, N., Hyman, J.D., Klise, K., Viswanathan. H.S., Wang, Y., A Comparative Study of Discrete Fracture Network and Equivalent Continuum Models for Simulating Flow and Transport in the Far Field of a Hypothetical Nuclear Waste Repository in Crystalline Host Rock, Journal of Hydrology, 2017.
  15. Frash, L.P., Carey, J.W., Ickes, T., Viswanathan, H.S., Caprock integrity susceptibility to permeable fracture creation, International Journal of Greenhouse Gas Control, 64, pp. 60-72, 2017.
  16. Hyman, J.D., Hagberg, A., Srinivasan, S., Mohd-Yusof, J., Viswanathan, H.S., Accurate and efficient predictions of first passage times in sparse discrete fracture networks using graph-based reductions, Physical Review E, 96(1), 2017.
  17. Xiao, T., Bordelon, A., Viswanathan, H.S., Dai, Z., Tian, H., Esser, R., Jia, W., Carey, J.W., Quantification of CO2-cement-rock Interactions at the Well-Caprock-Reservoir Interface and Implications for Geologic CO2 Storage, International Journal of Greenhouse Gas Control, vol 63, pp 126-140, 2017.
  18. Xiao, T., Viswanathan, H.S., Hakala, A., Cather, M., Jia, W., Zhang, Y., Mcpherson, B. Arsenic mobilization in shallow aquifers due to CO2 and brine intrusion from storage reservoir, Nature Scientific Reports, vol 7, 2017.
  19. Middleton, R.S., Gupta, R., Hyman, J.D., Viswanathan, H.S., The shale gas revolution: barriers, sustainability, and emerging opportunities, 199, pp. 88-95, Applied Energy, 2017.
  20. Djidjev, H., O’Malley, D., Viswanathan, H.S., Hyman, J.D., Karra, S., Srinivasan, Learning on Graphs for Predictions of Fracture Propagation, Flow and Transport,  First Workshop on the Intersection of Graph Algorithms and Machine Learning, Parallel and Distributed Processing Sympossium Workshops, IEEE, 2017.
  21. JD Hyman, J Jiménez-Martínez, HS Viswanathan, JW Carey, ML Porter, E Rougier, S Karra, Q Kang, L Frash, L Chen, Z Lei, D O’Malley, N Makedonska, Understanding hydraulic fracturing: a multi-scale problem, Phil. Trans. R. Soc. A, 374 (2078), 2016.
  22. IC Christov, HS Viswanathan, Introduction: energy and the subsurface, Phil. Trans. R. Soc. A, 374 (2078), 2016.
  23. Z. Lei, E. Rougier, EE Knight, L Frash, JW Carey, H Viswanathan, A non-locking composite tetrahedron element for the combined finite discrete element method, Engineering Computations, 33(7), 2016.
  24. N Makedonska, JD Hyman, S Karra, SL Painter, CW Gable, HS Viswanthan, Evaluating the effect of internal aperture variability on transport in kilometer scale discrete fracture networks, Advances in Water Resources, 94, pp. 486-497, 2016.
  25. F Pan, BJ McPherson, Z Dai, W Jia, SY Lee, W Ampomah, H Viswanathan, Rich Esser, Uncertainty analysis of carbon sequestration in an active CO2-EOR field, International Journal of Greenhouse Gas Control, 51, pp. 18-28, 2016.
  26. JD Hyman, G. Alrich, H Viswanathan, N Makedonska, S Karra, Fracture Size and Transmissivity Correlations: Implications for Transport Simulations in Discrete Fracture Networks, Water Resources Research, 52 (8), pp. 6472-6489, 2016.
  27. LP Frash, JW Carey, Z. Lei, E Rougier, T Ickes, HS Viswanathan, High-stress triaxial direct-shear fracturing of Utica shale and in situ x-ray microtomography with permeability measurement, Journal of Geophysical Research, Solid Earth 121(7), pp. 5493-5508, 2016.
  28. Z. Dai, H Viswanathan, R Middleton, F Pan, W Ampomah, C Yang, W Jia, T Xia, SY Lee, B McPherson,R Balch, R Grigg, M White, CO2 accounting and risk analysis for CO2 sequestration at enhanced oil recovery sites, Environmental Science and Technology, 50(14), pp. 7456-7554, 2016.
  29. JW Carey, LP Frash, HS Viswanathan, Dynamic triaxial study of direct shear fracturing and precipitation-induced transient permeability observed by in situ x-ray radiography, 50th US Rock Mechanics/Geomechanics Proceedings, 2016.
  30. LP Frash, JW Carey, HS Viswanathan, Notched specimen hydraulic fracturing method for conducting mechanical and hydrological experiments at triaxial reservoir conditions,  50th US Rock Mechanics/Geomechanics Proceedings, 2016.
  31. G Aldrich, J Hyman, S Karra, C Gable, N Makedonska, H Viswanathan, Analysis and visualization of discrete fracture networks using a flow topology graph, IEEE, 2016.
  32. MK Mudunuru , S Karra, DR Harp, GD Guthrie, HS Viswanathan, Interpolation-based reduced-order models to predict transient thermal output for enhanced geothermal systems, arXIV preprint, pp. 1606.04567, 2016.
  33. Z Lei, E Rougier, EE Knight, A Munjiza, H Viswanathan, A generalized anisotropic deformation formulation for geomaterials, Compuational Particle Mechanics, 3(2), 215-228, 2016.
  34. OT Summerscales, BL Scott, HS Viswnathan, AD Sutton, Synthesis and reactivity of cis-FeH 2 (dcpe) 2 (dcpe= 1, 2-bis (dicyclohexylphosphino) ethane), Inorganic Chemistry Communications, 63, pp. 57-60, 2016.
  35. JD Hyman, S Karra, N Makedonska, CW Gable, SL Painter, HS Viswanathan, dfnWorks: A discrete fracture network framework for modeling subsurface flow and transport, Computers & Geosciences 84, 10-19, 2015.
  36. L Chen, Q Kang, Z Dai, HS Viswanathan, W Tao, Permeability prediction of shale matrix reconstructed using the elementary building block model, Fuel 160, 346-356, 2015.
  37. ML Porter, J Jiménez-Martínez, JW Carey, H Viswanathan, F Mody, Fundamental Investigation of Gas Injection in Microfluidic Shale Fracture Networks at Geologic Conditions, 49th US Rock Mechanics/Geomechanics Symposium Proceedings, 2015.
  38. DT Birdsell, H Rajaram, D Dempsey, HS Viswanathan, Numerical Model of Hydraulic Fracturing Fluid Transport in the Subsurface with Pressure Transient and Density Effects, 49th US Rock Mechanics/Geomechanics Symposium Proceedings, 2015.
  39. GD Lackey, H Rajaram, S Karra, HS Viswanathan, Modeling Stray Gas Leakage from Wellbores in Colorado Shale Gas Operations, 49th US Rock Mechanics/Geomechanics Symposium Proceedings, 2015.
  40. JJ Sheng, T Cook, W Barnes, F Mody, M Watson, M Porter, HS Viswanathan, Screening of the EOR Potential of a Wolfcamp Shale Oil Reservoir,  49th US Rock Mechanics/Geomechanics Symposium Proceedings, 2015.
  41. JW Carey, E Rougier, Z Lei, H Viswanathan, Experimental Investigation of Fracturing of Shale with Water, 49th US Rock Mechanics/Geomechanics Symposium Proceedings, 2015.
  42. Z Lei, E Rougier, EE Knight, A Munjiza, W Carey, HS Viswanathan, FDEM Simulation on a Triaxial Core-Flood Experiment of Shale, 49th US Rock Mechanics/Geomechanics Symposium Proceedings, 2015.
  43. HS Viswanathan, JW Carey, S Karra, ML Porter, E Rougier, RP Currier, Q Kang, Integrated Experimental and Computational Study of Hydraulic Fracturing and the Use of Alternative Fracking Fluids, 49th US Rock Mechanics/Geomechanics Symposium Proceedings, 2015.
  44. D O'Malley, S Karra, RP Currier, N Makedonska, JD Hyman, HS Viswanathan, Where Does Water Go During Hydraulic Fracturing?, Groundwater, 2015.
  45. S Karra, N Makedonska, HS Viswanathan, SL Painter, JD Hyman, Effect of advective flow in fractures and matrix diffusion on natural gas production, Water Resources Research, 2015.
  46. JW Carey, Z Lei, E Rougier, H Mori, H Viswanathan, Fracture-permeability behavior of shale, Journal of Unconventional Oil and Gas Resources 11, 27-43, 2015.
  47. JD Hyman, SL Painter, H Viswanathan, N Makedonska, S Karra, Influence of injection mode on transport properties in kilometer‐scale three‐dimensional discrete fracture networks, Water Resources Research 51 (9), 7289-7308, 2015.
  48. DT Birdsell, H Rajaram, D Dempsey, HS Viswanathan, Hydraulic fracturing fluid migration in the subsurface: A review and expanded modeling results, Water Resources Research 51 (9), 7159-7188, 2015.
  49. RS Middleton, JW Carey, RP Currier, JD Hyman, Q Kang, S Karra, J Jimenez-Martinez, ML Porter, HS Viswanathan, Shale gas and non-aqueous fracturing fluids: Opportunities and challenges for supercritical CO2, Applied Energy 147, 500-509, 2015
  50. RS Middleton , Levine, J., Bielicki, J. Rice, M., Viswanathan, H.S., Carey, J.W., Stauffer, P.H., Jumpstarting commercial‐scale CO2 capture and storage with ethylene production and enhanced oil recovery in the US Gulf, Greenhouse Gases: Science and Technology, 2015.
  51. L Chen, W Fang, Q Kang, JDH Hyman, HS Viswanathan, WQ Tao, Generalized lattice Boltzmann model for flow through tight porous media with Klinkenberg's effect, Physical Review E 91 (3), 033004, 2015.
  52. L Chen, L Zhang, Q Kang, HS Viswanathan, J Yao, W Tao, Nanoscale simulation of shale transport properties using the lattice Boltzmann method: permeability and diffusivity, Nature Scientific reports 5, 2015.
  53. Z Lei, E Rougier, EE Knight, A Munjiza, H Viswanathan, A generalized anisotropic deformation formulation for geomaterials, Computational Particle Mechanics, 1-14, 2014.
  54. ML Porter, J Jiménez-Martínez, R Martinez, Q McCulloch, JW Carey, HS Viswanathan, Geo-material microfluidics at reservoir conditions for subsurface energy resource applications, Lab on a Chip 15 (20), 4044-4053, 2015.
  55. R Middleton, H Viswanathan, R Currier, R Gupta, CO2 as a fracturing fluid: Potential for commercial-scale shale gas production and CO2 sequestration, Energy Procedia 63, 7780-7784, 2014.
  56. Z Dai, H Viswanathan, J Fessenden-Rahn, R Middleton, F Pan, W Jia, Uncertainty Quantification for CO 2 Sequestration and Enhanced Oil Recovery, Energy Procedia 63, 7685-7693, 2014.
  57. L Chen, Q Kang, HS Viswanathan, WQ Tao, Pore‐scale study of dissolution‐induced changes in hydrologic properties of rocks with binary minerals, Water Resources Research 50 (12), 9343-9365, 2014.
  58. Kelkar, S. Lewis, K., Karra, S., Zyvoloski, G., Rapaka, S., Viswanathan, H., et al., Modeling coupled thermo-hydro-mechanical processes in subsurface geological media using the simulator FEHM, International Journal of Rock Mechanics and Mining Sciences, 70, 569-580, 2014.
  59. Q Kang, L Chen, AJ Valocchi, HS Viswanathan, Pore-scale study of dissolution-induced changes in permeability and porosity of porous media, Journal of Hydrology 517, 1049-1055, 2014.
  60. Bazant, Z., M. Salviato, V. T. Chau, H. S. Viswanathan, and A. Zubelewicz. Why fracking works. Journal of Applied Mechanics. 81 (10): 101010-101020, 2014.
  61. Zubelewicz, A., Rougier, E., Ostoja-Starzewski,  M., Bradley, C., Knight, E.E., Viswanathan, H.S., Dynamic behavior and fracture in geomaterial, International Journal of Rock Mechanics & Mining Sciences, 277-282, 2014.
  62. Dai, Z., Keating, E., Pawar, R., Bacon, D., Viswanathan, H.S. , Zheng, L., Carrol, S., Risk assessment for shallow groundwater resources at a potential carbon sequestration site, Nature Scientific Reports, 2014.
  63. Dai, Z., Middleton, R., Viswanathan, H.S., Fessenden-Rahn, J., Baumaan, J., Pawar, R., Lee, S., Determining optimal parameters for CO2-Enhanced Recovery, Environmental Science and Technology Letters 1 (1), 49-54, 2013.
  64. Chaudhuri, A., Rajararam, H., Viswnathan, H.,Early-stage Hypogene Karstification in a Mountain Hydrologic System: A Coupled Thermo-Hydro-Chemical Model Incorporating Buoyant Convection, Water Resources Research, 49 (9), 5880-5899, 2013.
  65. Kelkar, S., Srinivasan, G., Robinson, B., Roback, R., Viswanathan, H., Rehfeldt, Tucci, P., Breakthrough of contaminant plumes in saturated volcanic rock: implications from the Yucca Mountain Site, Geofluids, 2013.
  66. Severino, G., Bartolo, D, Toraldo, G, Srinivasan, G, Viswanathan, H, Travel time approach to kinetically sorbing solute by diverging radial flows through heterogeneous porous formations, Vol 48, 2012.
  67. Keating, E.; Newell, D.L.; Viswanathan, H.; Pawar, R.; Carey, J.W.; Zyvoloski. G.; CO2-brine transport into shallow aquifers along fault zones, Environmental Science and Technology Special Issue, 2012.
  68. Keating, E.; Hakala, J.A.; Viswanathan, H.; Carey, J.W.; Pawar, R.; Guthrie, G.D.; Fessenden-Rahn, J.; CO2 Leakage impacts on shallow groundwater: field-scale reactive-transport simulations informed by observations at a natural analog site, Applied Geochemistry Special Issue on CO2 sequestration, 2012.
  69. Viswanathan, H.S.; Dai, Z.; Lopano, C.; Keating, E.; Hakala, J.A.; Scheckel, K.G.; Zheng, L.; Guthrie; G.D.; Pawar, R.J., A Robust Geochemical and Reactive Transport Model to Evaluate Possible Sources of Arsenic at the CO2 Sequestration Natural Analog Site in Chimayo, New Mexico,  International Journal of Greenhouse Gas Control, vo. 10, pp. 199-214, 2012.
  70. Middleton, R. S.; Keating, G. N.; Viswanathan, H. S.; Stauffer, P. H.; Pawar, R. J., Effects of geologic reservoir uncertainty on CO2 transport and storage infrastructure. International Journal of Greenhouse Gas Control 2012, 8, 132-142.
  71. Middleton, R. S.; Keating, G. N.; Stauffer, P. H.; Jordan, A. B.; Viswanathan, H. S.; Kang, Q. J.; Carey, J. W.; Mulkey, M. L.; Sullivan, E. J.; Chu, S. P., The cross-scale science of CO2 capture and storage: from pore scale to regional scale. Energy & Environmental Science 2012.
  72. Chaudhuri, A.; Rajaram, H.; Viswanathan, H., Fracture alteration by precipitation resulting from thermal gradients: Upscaled mean aperture-effective transmissivity relationship. Water Resources Research 2012, 48 (1), W01601.
  73. Stauffer, P. H.; Pawar, R. J.; Surdam, R. C.; Jiao, Z.; Deng, H.; Lettelier, B. C.; Viswanathan, H. S.; Sanzo, D. L.; Keating, G. N., Application of the CO2-PENS risk analysis tool to the Rock Springs Uplift, Wyoming. Energy Procedia 2011, 4, 4084-4091.
  74.  Stauffer, P.; Keating, G. N.; Middleton, R. S.; Viswanathan, H. S.; Singh, R. P.; Berchtold, K. A.; Pawar, R. J.; Mancino, A., Greening Coal: Breakthroughs and Challenges in Carbon Capture and Storage. Environmental Science & Technology 2011.
  75.  Severino, G.; Tartakovsky, D. M.; Srinivasan, G.; Viswanathan, H., Lagrangian models of reactive transport in heterogeneous porous media with uncertain properties. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Science 2011.
  76.  Keating, G. N.; Middleton, R. S.; Viswanathan, H. S.; Stauffer, P. H.; Pawar, R. J., How storage uncertainty will drive CCS infrastructure. Energy Procedia 2011, 4, 2393-2400.
  77.  Keating, G. N.; Middleton, R. S.; Stauffer, P. H.; Viswanathan, H. S.; Letellier, B. C.; Pasqualini, D.; Pawar, R. J.; Wolfsberg, A. V., Mesoscale Carbon Sequestration Site Screening and CCS Infrastructure Analysis†. Environmental science & technology 2011.
  78.  Keating, E. H.; Hakala, J. A.; Viswanathan, H.; Capo, R.; Stewart, B.; Gardiner, J.; Guthrie, G.; William Carey, J.; Fessenden, J., The challenge of predicting groundwater quality impacts in a CO2 leakage scenario: Results from field, laboratory, and modeling studies at a natural analog site in New Mexico, USA. Energy Procedia 2011, 4, 3239-3245.
  79.  Kaszuba, J. P.; Viswanathan, H. S.; Carey, J. W., Relative stability and significance of dawsonite and aluminum minerals in geologic carbon sequestration. Geophys. Res. Lett 2011, 38, L08404.
  80.  Wang, M.; Kang, Q.; Viswanathan, H.; Robinson, B. A., Modeling of electro-osmosis of dilute electrolyte solutions in silica microporous media. J. Geophys. Res 2010, 115, B10205.
  81.  Srinivasan, G.; Tartakovsky, D. M.; Dentz, M.; Viswanathan, H.; Berkowitz, B.; Robinson, B. A., Random walk particle tracking simulations of non-Fickian transport in heterogeneous media. Journal of Computational Physics 2010, 229 (11), 4304-4314.
  82.  Kang, Q.; Lichtner, P. C.; Viswanathan, H. S.; Abdel-Fattah, A. I., Pore scale modeling of reactive transport involved in geologic CO 2 sequestration. Transport in porous media 2010, 82 (1), 197-213.
  83. Connington, K.; Kang, Q.; Viswanathan, H.; Chen, S., LBM Simulations of 3D  Peristaltic Transport with Particles. Bulletin of the American Physical Society 2010, 55.
  84. Chaudhuri, A.; Rajaram, H.; Viswanathan, H., W10410-Alteration of fractures by precipitation and dissolution in gradient reaction environments: Computational results and stochastic analysis (DOI 10.1029/2008WR006982). Water Resources Research 2010, 44 (10).
  85. Wang, M.; Kang, Q.; Viswanathan, H., Electroosmosis of Dilute Electrolyte Solutions in Microporous Media. 2009.
  86. Fessenden, J. E.; Stauffer, P. H.; Viswanathan, H. S., Natural Analogs of Geologic CO2 Sequestration: Some General Implications for Engineered Sequestration. Natural Analog Research 2009, 1-23.
  87. Connington, K.; Kang, Q.; Viswanathan, H.; Abdel-Fattah, A.; Chen, S., Peristaltic particle transport using the lattice Boltzmann method. Physics of Fluids 2009, 21, 053301.
  88. Chaudhuri, A.; Rajaram, H.; Viswanathan, H.; Zyvoloski, G.; Stauffer, P., Buoyant convection resulting from dissolution and permeability growth in vertical limestone fractures. Geophys. Res. Lett 2009, 36, L03401.
  89. Bromhal, G.; Harbert, B.; McPherson, B.; Deo, M.; Stauffer, P.; Carey, W.; Strazisar, B.; Kutchko, B.; Viswanathan, H.; Wildman, D., Understanding the impact of the level of characterization on long-term performance predictions at geologic CO2 sequestration sites. IOP Conference Series: Earth and Environmental Science 2009, 6, 172007.
  90. Zyvoloski, G. A.; Robinson, B. A.; Viswanathan, H. S., Generalized dual porosity: A numerical method for representing spatially variable sub-grid scale processes. Advances in Water Resources 2008, 31 (3), 535-544.
  91. Viswanathan, H. S.; Pawar, R. J.; Stauffer, P. H.; Kaszuba, J. P.; Carey, J. W.; Olsen, S. C.; Keating, G. N.; Kavetski, D.; Guthrie, G. D., Development of a hybrid process and system model for the assessment of wellbore leakage at a geologic CO2 sequestration site. Environmental science & technology 2008, 42 (19), 7280-7286.
  92. Stauffer, P. H.; Viswanathan, H. S.; Pawar, R. J.; Guthrie, G. D., A system model for geologic sequestration of carbon dioxide. Environmental Science & Technology 2008, 43 (3), 565-570.
  93.  Newell, D. L.; Kaszuba, J. P.; Viswanathan, H. S.; Pawar, R. J.; Carpenter, T., Significance of carbonate buffers in natural waters reacting with supercritical CO2: Implications for monitoring, measuring and verification (MMV) of geologic carbon sequestration. Geophysical Research Letters 2008, 35 (23), L23403.
  94. Connington, K.; Kang, Q.; Viswanathan, H.; Chen, S.; Abdel-Fattah, A., Lattice Boltzmann Simulations of Peristaltic Particle Transport. Bulletin of the American Physical Society 2008, 53.
  95. Chaudhuri, A.; Rajaram, H.; Viswanathan, H., Alteration of fractures by precipitation and dissolution in gradient reaction environments: Computational results and stochastic analysis. Water Resources Research 2008, 44 (10), W10410.
  96. Robinson, B. A.; Wolfsberg, A. V.; Viswanathan, H. S.; Reimus, P. W., A colloid-facilitated transport model with variable colloid transport properties. Geophysical research letters 2007, 34 (9), L09401.
  97. Stauffer, P.; Viswanathan, H. S.; Pawar, R. J.; Klasky, M. L.; Guthrie, G. D., CO2-PENS: A CO2 sequestration systems model supporting risk-based decisions. Proceedings of the 16th International Conference on Computational Methods in Water Resources 2006, 19-22.
  98. Pawar, R.; Carey, J.; Chipera, S.; Fessenden, J.; Kaszuba, J.; Keating, G.; Lichtner, P.; Olsen, S.; Stauffer, P.; Viswanathan, H., Development of a framework for long-term performance assessment of geologic CO2 sequestration sites. Proceedings of the 8th International Conference on Greenhouse Gas Control Technologies 2006, 19-22.
  99. Viswanathan, H. S.; Robinson, B. A.; McLin, S. G., Hydrologic Behavior of Unsaturated, Fractured Tuff. Vadose Zone Journal 2005, 4 (3), 694-707.
  100. Viswanathan, H. S.; Valocchi, A. J., Comparison of streamtube and three-dimensional models of reactive transport in heterogeneous media. Journal of Hydraulic Research 2004, 42 (S1), 141-145.
  101. Valocchi, A. J.; Herrera, P.; Viswanathan, H., Incorporating transverse mixing into streamline-based simulation of transport in heterogeneous aquifers. 2004.
  102. Viswanathan, H. S.; Robinson, B. A.; Gable, C. W.; Carey, J. W., A geostatistical modeling study of the effect of heterogeneity on radionuclide transport in the unsaturated zone, Yucca Mountain. Journal of contaminant hydrology 2003, 62, 319-336.
  103.  Robinson, B. A.; Viswanathan, H. S., Application of the theory of micromixing to groundwater reactive transport models. Water Resour. Res 2003, 39 (11), 1313.
  104.  Robinson, B. A.; Viswanathan, H. S.; Valocchi, A. J., Efficient numerical techniques for modeling multicomponent ground-water transport based upon simultaneous solution of strongly coupled subsets of chemical components. Advances in Water Resources 2000, 23 (4), 307-324.
  105. Viswanathan, H. S.; Robinson, B. A.; Valocchi, A. J.; Triay, I. R., A reactive transport model of neptunium migration from the potential repository at Yucca Mountain. Journal of Hydrology 1998, 209 (1-4), 251-280.