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This book focuses on the modeling of gas-solid, liquid-solid, non-Newtonian fluid-solid, and supercritical fluid-solid fluidized beds and multiphase flows. Simulation techniques are categorized into Euler–Euler with kinetic theory of granular flow (KTGF) and Euler–Lagrange with discrete element method (DEM) approaches. Both the governing equations and numerical implementations are presented. A new CFD-KTGF-DEM approach describes phase interactions, free from the empirical restitution coefficient used in KTGF, and accounts for turbulence effects on discrete particle motion, which DEM cannot achieve. Additionally, a low Stokes number KTGF model is introduced, incorporating the interstitial fluid's effect, unlike the classical KTGF, which assumes vacuum conditions. Special attention is given to momentum exchange between heterogeneous and homogeneous flows in fluidized beds and multiphase systems, and various multiscale drag models are presented. The book also discusses the application of these approaches in fluid-solid fluidized bed reactors and oil-gas drilling processes.

Huilin Lu is a professor of Energy Science and Engineering at Harbin Institute of Technology. He has taught multiphase flow process, transport phenomena and fluidization courses. His research interests include computational fluid dynamic of multiphase flow and fluidized bed reactors. He has been a visiting scholar at the Illinois Institute of Technology from 1993 to 1997. Professor Huilin has received a number of national awards including the second class prizes of Natural Science Award of the Ministry of Education (2013) and Heilongjiang Province (2021). He is a winner of AIChE Particle Technology Forum’s PSRI Fluidization and Fluid Particle System Award (2019).

Guodong Liu is currently a professor of School of Energy Science and Engineering at Harbin Institute of Technology (HIT) in China. He holds a B.Eng. in Thermal and Power Engineering, as well as M.Sc. and Ph.D. in Thermal Engineering from the Harbin Institute of Technology. He has taught multiphase flow and heat transfer and fluidization engineering courses for undergraduate and graduate students. His research interests include computational fluid dynamic of multiphase flow, thermal hydraulics and fluidized bed reactors. Professor Guodong Liu was a visiting scholar at the Petroleum Engineering at the Colorado School of Mines in 2012-2013, and Chemical Engineering at the Princeton University in 2018-2019. He received the second class prizes of Natural Science Award of the Ministry of Education (2013) and Heilongjiang Province (2021).  

Qinghong Zhang is an instructor of Transportation and Vehicle Engineering at Shandong University of Technology. She has taught fluid-mechanics, fluidization engineering and combustion theory in engine courses. She holds a B.Eng. in thermal and power engineering at the Shandong University of Technology, as well as a M.Sc. plus a Ph.D. in Thermal Engineering from the Harbin Institute of Technology. Her research interests include multiphase flow and reaction processes. Dr. Qinghong is a winner of Young Excellent Talents Recruitment Program of Shandong Province (2020).

Xiaoxue Jiang is a lecturer of Oil and Gas Storage and Transportation Engineering at the Changzhou University. She holds a B.Eng. and a M.Sc. degree in petroleum engineering from the Northeast Petroleum University, plus a Ph.D. degree in Thermal Engineering from the Harbin Institute of Technology. Her research interests are in the field of non-Newtonian fluid-particle multiphase flow in petroleum engineering and gas-solid fluidization in chemical engineering. Dr. Xiaoxue has received awards for National Scholarship for doctoral students of the Ministry of Education (2021), Outstanding Graduate Student of Wu Zhonghua Award Fund Council (2022) and first-class Award of Chinese Industry-University Research Cooperation Innovation Achievement from China Association for Promotion of Industry-University-Research Cooperation (2023).

Boxue Pang is an instructor of Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines at the Northeastern University. He holds a B.Eng. and a M.Sc. degree in oil and gas storage and transportation engineering from the Northeast Petroleum University, plus a Ph.D. degree in Thermal Engineering from the Harbin Institute of Technology. He has taught deep environmental mechanics and deep multi-field mechanics courses. His research interests are in the field of non-Newtonian fluid-particle flow, with a focus on the kinetic theory of granular flow in petroleum engineering, deep mining ventilation and safety. Dr. Boxue has received awards for Excellent Graduate from Harbin Institute of Technology (2021) and Excellent Postdoctoral Fellow from Northeastern University (2023).

Wenjian Cai is a principal investigator of Aerospace Science and Technology at Academy of Aerospace Solid Propulsion Technology. He holds a B.Eng. and a M.Sc. in Power Engineering and Engineering Thermophysics, plus a Ph.D. in Thermal Engineering from Harbin Institute of Technology. His research interests include multiphase fluid mechanics, heat and mass transfer, combustion mechanisms and power machinery design. Dr. Wenjian has more than 10 publications in major international journals. He has received honors for the first-class People's Scholarship (2017), the National Inspiration Award (2017) and the National Scholarship for Doctoral Students of the Ministry of Education (2022).