Igor Bolotnov

Professor of Nuclear Engineering

  • 518-542-8939
  • Burlington Laboratory 2153
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Dr. Bolotnov holds a joint faculty appointment with Oak Ridge National Laboratory and actively collaborates with Nuclear Energy and Fuel Cycles Division. He teaches reactor engineering (NE-402/502) and multiscale simulation of two-phase flow (MAE/NE-577) courses.

Dr. Bolotnov specializes in computational fluid dynamics applications in nuclear reactor engineering in general, and in multiphase turbulent flow. Dr. Bolotnov research has been supported by the Department of Energy’s Consortium for Advanced Simulation of LWRs (CASL), the U.S. Nuclear Regulatory Commission, DOE’s NEUP program, and the National Science Foundation (NSF) among others. Bolotnov’s Multiphase research group has vast experience and capability with high-performance-computing enabled CFD simulation of complex single- and multi-phase flow, using PHASTA code.

Dr. Bolotnov is currently serving as Secretary for the Thermal Hydraulics Division of American Nuclear Society (ANS). In addition, he has been appointed the Associate Editor for Annals of Nuclear Energy.


Ph.D. 2008

Engineering Physics

Rensselaer Polytechnic Institute

M.S. 2003

Engineering Physics

Rensselaer Polytechnic Institute

B.S. 2001

Applied Mathematics and Informatics

Bashkir State University, Russia

Research Description

The Multiphase Research Group focuses on using multiscale approaches for nuclear reactor simulations, development of new spectral cascade transfer multiphase flow turbulence models, and direct numerical simulation of single and multiphase turbulent flows.


A direct numerical simulation study to elucidate the enhancement of heat transfer for nucleate boiling on surfaces with micro-pillars
Zhang, J., Rafique, M., Ding, W., Bolotnov, I. A., & Hampel, U. (2023), INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 147. https://doi.org/10.1016/j.icheatmasstransfer.2023.106943
Data-Driven RANS Turbulence Closures for Forced Convection Flow in Reactor Downcomer Geometry
Iskhakov, A. S., Tai, C.-K., Bolotnov, I. A., Nguyen, T., Merzari, E., Shaver, D. R., & Dinh, N. T. (2023, March 16), NUCLEAR TECHNOLOGY, Vol. 3. https://doi.org/10.1080/00295450.2023.2185056
Direct Numerical Simulation of Low and Unitary Prandtl Number Fluids in Reactor Downcomer Geometry
Tai, C.-K., Nguyen, T., Iskhakov, A. S., Merzari, E., Dinh, N. T., & Bolotnov, I. A. (2023, June 17), NUCLEAR TECHNOLOGY, Vol. 6. https://doi.org/10.1080/00295450.2023.2213286
Direct Numerical Simulation of Single- and Two-Phase Flows for Nuclear Engineering Geometries
Bolotnov, I. A. (2023, July 24), NUCLEAR TECHNOLOGY, Vol. 7. https://doi.org/10.1080/00295450.2023.2232222
Direct numerical simulation of heat transfer on a deformable vapor bubble rising in superheated liquid
Li, J., Liao, Y., Bolotnov, I. A., Zhou, P., Lucas, D., Li, Q., & Gong, L. (2023), PHYSICS OF FLUIDS, 35(2). https://doi.org/10.1063/5.0137675
Direct numerical simulation of microlayer formation and evaporation underneath a growing bubble driven by the local temperature gradient in nucleate boiling
Zhang, J., Rafique, M., Ding, W., Bolotnov, I. A., & Hampel, U. (2023), INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 193. https://doi.org/10.1016/j.ijthermalsci.2023.108551
Interface Capturing Flow Boiling Simulations in a Compact Heat Exchanger
Iskhakova, A., Kondo, Y., Tanimoto, K., Dinh, N. T., & Bolotnov, I. A. (2023), ASME JOURNAL OF HEAT AND MASS TRANSFER, 145(4). https://doi.org/10.1115/1.4056688
Study of Stable Stratification in HiRJET Facility With Direct Numerical Simulation
Tai, C.-K., Mao, J., Petrov, V., Manera, A., & Bolotnov, I. A. (2023, June 9), NUCLEAR SCIENCE AND ENGINEERING, Vol. 6. https://doi.org/10.1080/00295639.2023.2197656
Toward Improved Correlations for Mixed Convection in the Downcomer of Molten Salt Reactors
Nguyen, T., Merzari, E., Tai, C.-K., Bolotnov, I. A., & Jackson, B. (2023, July 20), NUCLEAR TECHNOLOGY, Vol. 7. https://doi.org/10.1080/00295450.2023.2223036
Validation of RANS-Based Turbulence Models Against High-Resolution Experiments and DNS for Buoyancy-Driven Flow with Stratified Fronts
Mao, J., Vishwakarma, V., Welker, Z., Tai, C. K., Bolotnov, I. A., Petrov, V., & Manera, A. (2023, August 10), NUCLEAR SCIENCE AND ENGINEERING, Vol. 8. https://doi.org/10.1080/00295639.2023.2241800

View all publications via NC State Libraries


Pilot Study on Two-Phase Flow DNS Application to Heat Transfer Enhancement Pipe
Mitsubishi Heavy Industries, Ltd.(10/01/22 - 5/15/23)
US Dept. of Energy (DOE)(11/01/22 - 3/07/23)
Two Phase Flow Modeling and Simulation – CNP Core Project 7
Consortium for Nuclear Power (CNP)(7/01/22 - 6/30/23)
ICS Heat Exchange Optimization, CNP Core Project 8
Consortium for Nuclear Power (CNP)(7/01/22 - 6/30/23)
Biocatalyst Interactions with Gases (BIG) Collaboration
Novo Nordisk Foundation(9/01/22 - 8/31/27)
High-performance computing studies of HFIR flow channel
Oak Ridge National Laboratories - UT-Battelle LLC(8/26/21 - 3/31/22)
Two-Phase Flow DNS Phase 2 Project
Mitsubishi Heavy Industries, Ltd.(5/01/21 - 10/31/22)
Plasma Breakdown and Instabilities in the Multiphase Plasma-Gas Bubble-Liquid System
National Science Foundation (NSF)(5/01/21 - 4/30/24)
Multiple Bubble Boiling Simulation Scaling and Evaluation
US Dept. of Energy (DOE)(9/08/20 - 11/30/20)
Center for thermal-fluids application in nuclear energy: Establishing the knowledge base for thermal-hydraulic multiscale simulation to accelerate the deployment of advanced reactors.
US Dept. of Energy (DOE)(10/01/20 - 9/30/23)