Publications

Journal Publication
2021
1 Yamashiro B., Tomac I. Particle Clustering Dynamics in Dense-Phase Particle-Fluid Slurries, Computers and Geotechnics* In print.
2020
3 Ma W., Perng J. and Tomac I. Experimental Investigation of Proppant Flow and Transport Dynamics Through Fracture Intersections, Geomechanics for Energy and Environment, 100232. 
4 Tomac, I. and Gutierrez, M. Micromechanics of hydraulic fracturing and damage in rock based on DEM modeling. Granular Matter, 22:56 (2020)
2019
5 Tomac, I. and Gutierrez, M. Micro-mechanics of hydro-thermo-mechanical processes during convective heat flow from a borehole in rock. Journal of Engineering Mechanics, 145(8) 04019055 (2019)
7 Fjaestad, D. and Tomac, I. Experimental investigation of sand proppant particles flow and transport regimes through narrow slots. Powder Technology. 343: 495-511 (2019)
2018
8 Luo L. and Tomac, I. Experimental investigation of particle agglomeration effects on slurry settling in Viscous Fluid. Transport in Porous Media, 121: 333-352 (2018)
9 Tomac, I. and Sauter, M. A Review on challenges in the assessment of geomechanical rock performance for deep geothermal reservoir development. Renewable and Sustainable Energy Reviews, 82(2): 3972-3980 (2018)
10 Luo L. and Tomac, I. Particle Image Velocimetry (PIV) Analysis of Particle Settling in Narrow Fracture Experiments. Geotechnical Testing Journal, 41(2) (2018)
2017
11 Tomac, I. and Gutierrez M. Coupled hydro-thermo- mechanical modeling of hydraulic fracturing in quasi-brittle rocks using DEM. Journal of Rock Mechanics and Geotechnical Engineering, 9(1): 92-104 (2017)
12 Caulk R. and Tomac, I. Reuse of abandoned oil and gas wells for geothermal energy production. Renewable Energy, 112 (C): 388-397 (2017)
2016
13 McCartney, J.S., Sánchez, M., and Tomac, I. Energy geotechnics: Advances in subsurface energy recovery, storage, and exchange. Computers and Geotechnics, 75: 244-256. (2016)
2015
14 Tomac, I. and Gutierrez, M. Micromechanics of proppant agglomeration during settling in hydraulic fractures. Journal of Petroleum Exploration and Production Technology, 5: 417–434 (2015)
15 Tomac, I. and Gutierrez, M. Formulation and implementation of coupled forced heat convection and heat conduction in DEM. Acta Geotechnica, 10: 421-433 (2015)
2014
16 Tomac, I. and Gutierrez, M. Fluid lubrication effects on particle flow in a channel. International Journal of Multiphase Flow, 65: 143-156 (2014)
2013
17 Tomac, I., Gutierrez, M. Discrete element modeling of non-linear submerged particle collisions. Granular Matter 15, 759–769 (2013)

Conference publications

  1. Yamashiro B.D. and Tomac, I. Particle Clustering Mechanisms and Influence on Proppant Flow and Transport, ARMA Golden, USA (2020)
  2. Yamashiro B.D. and Tomac, I. Proppant Slurry Flow and Transport Within Fractures With Rough Surfaces, ARMA Golden, USA (2020)
  3. Wei, S. and Tomac, I. Evaluation of Hydro-Mechanical Inelastic Fracture Propagation in Weak Sandstone Reservoirs. AGU, San Francisco, USA (2020)
  4. Movasat, M. and Tomac, I. Understanding the onset of mudflows and droplet dynamic on water repellent tilted surfaces. AGU, San Francisco, USA (2020)
  5. Yamashiro, B.D. and Tomac, I. Proppant Transport Behavior in Varying Fracture Alignments. 53rd ARMA 53rd US Rock Mechanics/Geomechanics Symposium, New York City, USA (2019)
  6. Movasat, M. and Tomac, I. Post-fire Mudflow Prevention by Biopolymer Treatment of Water Repellent Slopes. GeoCongress, Minneapolis, MI, USA (2020)
  7. Tomac, I. and Yamashiro, B. Micromechanics of dense-phase sand-fluid flow and transport in fractures. XVI Panamerican Conference on Soil Mechanics and Geotechnical Engineering, Cancun, Mexico (2019)
  8. Yamashiro, B. and Tomac, I. Proppant Transport Behavior due to Varying Fracture Geometry and Particle Concentration Distribution. EMI/G-I, Pasadena, CA, USA (2019)
  9. Yamashiro, B. and Tomac, I. Proppant Transport Behavior in Varying Fracture Alignments. 53rd ARMA 53rd US Rock Mechanics/Geomechanics Symposium, New York City, USA (2019)
  10. Yamashiro, B. and Tomac, I. Particle-Fluid Flow and Transport Between Geometrically Rough Surface Boundaries. DEM 8, Twente, Netherlands (2020)
  11. Tomac, I., Fjaestad, D. and Luo L. Experimental and Numerical Investigation of Micro-Mechanics of Particle-Fluid Flow and Transport. IS-Atlanta 2018: Geo-Mechanics from Micro to Macro, Atlanta, GA, USA (2018)
  12. Fjaestad, D. and Tomac, I. Proppant Flow and Transport in a Narrow Fracture in Turbulent Flow Regime, International Symposium on Energy Geotechnics (SEG-2018), EPFL Lausanne, Switzerland (2018)
  13. Fjaestad, D. and Tomac, I. Experimental Investigation of Proppant Flow and Transport in Narrow Fractures, ARMA 2018, Seattle, CA, USA (2018)
  14. Tomac, I. and Tartakovsky D. Experimental Evaluation of Turbulent Flow and Proppant Transport in a Narrow Fracture, 43rd Workshop on Geothermal Reservoir Engineering Stanford University, CA, USA (2018)
  15. Caulk, R.A. and Tomac, I. Micro-mechanics of hydro-mechanical coupled processes during hydraulic fracturing in sandstone. AGU Fall Meeting, New Orleans, USA (2017)
  16. Caulk, R. and Tomac, I. Reuse of abandoned oil and gas wells for geothermal energy production. AGU Fall Meeting, San Francisco, CA, USA (2016)
  17. Tomac, I. and Gutierrez, M. Quantification of transient heat flow and damage around the borehole using conductive-convective heat flow and transport DEM model in synthetic rock. Proceedings of the 4th Itasca Symposium on Applied Numerical Modeling, Lima, Peru. p. 559-569 (2016)
  18. Tomac, I. Hydro-thermo-mechanical behavior of granular material near the wellbore. Geo-Chicago 2016: Geotechnics for Sustainable Energy, Chicago, IL, USA,22-31 (2016)
  19. Luo, L. and Tomac, I. Particle image velocimetry analysis of proppant settling in a narrow slot. ARMA 2016, Houston, Texas, USA. ARMA-2016-652 (2016)
  20. Luo, L. and Tomac, I. Experimental study of proppant particle-particle interaction micromechanics during flow and transport in the fracture. 1st International Conference on Energy Geotechnics ICEGT 2016 in Kiel, Germany. p. 231-238 (2016)
  21. Tatomir, A.B., Tomac, I. and Sauter, M. A parametric sensitivity study on CO2 injection in deep saline aquifers accounting for hydro-mechanical micro fracturing. 1st International Conference on Energy Geotechnics ICEGT 2016 in Kiel, Germany. 223-230 (2016)
  22. Tomac, I., Tatomir, A.B. and Sauter, M., Effect of fracture surface damage on fluid flow and transport in geo-reservoirs. Second EAGE Workshop on Geomechanics and Energy, Celle, Germany (2015)
  23. Tomac, I. and Gutierrez, M. The effect of loading rate on hydraulic fracturing in synthetic granite: A Discrete element study. 2015 AGU Fall Meeting, San Francisco, CA, USA (2015)
  24. Tomac, I. and Gutierrez, M. Micromechanics of hydro-thermo-mechanical fracture propagation in granite. ARMA, Minneapolis, Minnesota, USA (2014)
  25. Tomac, I. and Gutierrez, M. Coupled hydro-thermo-mechanical modeling of hydraulic fracturing in quasi-brittle rocks using DEM. IS-Cambridge, UK (2014)
  26. Tomac, I., Salkovic, A. and Pest, D. Case history on determination of old bridge foundation depths using parallel seismic method. XV Danube - European Conference on Geotechnical Engineering (DECGE) (2014)
  27. Tomac, I. and Gutierrez, M. Particulate modeling of sand slurry flow retardation. 18th International Conference on Soil Mechanics and Geotechnical Engineering (ICSMGE), Paris, France. September (2013)
  28. Tomac, I. and Gutierrez, M. Numerical study of horizontal proppant flow and transport in a narrow hydraulic fracture. 47th U.S. Rock Mechanics/Geomechanics Symposium ARMA, San Francisco, USA. June (2013)
  29. Tomac, I. and Gutierrez, M. DEM study of hydraulic fracturing in enhanced geothermal systems. European Geothermal Congress, Pisa, Italy. June (2013)
  30. Tóth, A.N., McCartney, J.S., Tomac, I. and Balla, L. Geothermal E-learning through Hungarian-American cooperation. European Geothermal Congress, Pisa, Italy (2013)
  31. Tomac, I. and Gutierrez, M. DEM Study of proppant settling in a rough hydraulic fracture in granite. DEM6 International Conference, Golden, CO. August (2013)
  32. Tomac, I. and Gutierrez, M. Convective-conductive heat flow in granite. DEM6 International Conference, Golden, CO. August (2013)
  33. Tomac, I. and Gutierrez, M. Evaluation of the Brazilian test size effect using Discrete Element Modeling. 46th U.S. Rock Mechanics/Geomechanics Symposium ARMA, Chicago, USA (2012)
  34. Tomac, I. and Čorko, D. Braced deep excavation projects in the City of Zagreb - Execution details and risk sources. 5th Meeting of the Croatian Geotechnical Society, Osijek, Croatia (2009)
  35. Marić, B., Tomac, I., Puljak, S. and Lovrenćić, D. Settlement measurements in the area of the town of Sisak over a period of 30 years. 6th Austrian Geotechnik Tagung, "Vienna - Terzaghi Lecture", Vienna, Austria (2007)
  36. Tomac, I. and Marić, B. Deep excavation case histories in the City of Zagreb. XIII Danube-European Conference on Geotechnical Engineering. Ljubljana, Slovenia (2006)
  37. Čorko, D., Tomac, I., Leko, I. and Lašić, A. Jet-grouting application for landslide remediation. In-country training program, principles of design, rehabilitation and monitoring of landslides. Sarajevo, Bosnia and Herzegovina (2005)
  38. Tomac, I, Van Impe W.F., Verástegui Flores and R.D., Mengé, P. Binder-soil interaction in cement deep mixing through SEM analysis. 16th ICSMGE Osaka, Japan (2005)
  39. Tomac, I. and Marić, B. Foundation design of the new cable stayed bridge over the Kupa river in the town of Sisak. Book of Papers of the 1st Meeting of Croatian Bridge Constructors, Brijuni Islands, Croatia (2005)
  40. Čorko, D., Marić, B. Lovrenčić, D. and Tomac, I. The application of jet-grouting method for landslide remediation. The 5th Šuklje Day, Rogaška Slatina, Slovenia (2004)
  41. Čorko, D., Marić, B. Lovrenčić, D. and Tomac, I. Application of jet grouting in slide remediation. ASEP-GI Paris, France (2004)
  42. Marić, B., Kvasnička, P. Radaljac, D. Škacan, B. and Tomac, I. Use of combined soil nailing and geotechnical anchor system as the retaining structure for an open excavation. 3rd Nonveiller lecture, Hvar, Croatia (2004)
  43. Tomac, I. Retaining structure for basement deepening. XIV European Young Geotechnical Engineering Conference (EYGEC), Plovdiv, Bulgaria (2001)
  44. Tomac, I. Soil nailed retaining structure for the open excavation. International Young Geotechnical Engineering Conference (IYGEC), Southampton, UK. (2000)