Abstract
Abstract Multiphase flows with momentum, heat, and mass transfer exist widely in a variety of industrial applications. With the rapid development of numerical algorithms and computer capacity, advanced numerical simulation has become a promising tool in investigating multiphase transport problems. Immersed boundary (IB) method has recently emerged as such a popular interface capturing method for efficient simulations of multiphase flows, and significant achievements have been obtained. In this review, we attempt to give an overview of recent progresses on IB method for multiphase transport phenomena. Firstly, the governing equations, the basic ideas, and different boundary conditions for the IB methods are introduced. This is followed by numerical strategies, from which the IB methods are classified into two types, namely the artificial boundary method and the authentic boundary method. Discussions on the implementation of various boundary conditions at the interphase surface with momentum, heat, and mass transfer for different IB methods are then presented, together with a summary. Then, the state-of-the-art applications of IB methods to multiphase flows, including the isothermal flows, the heat transfer flows, and the mass transfer problems are outlined, with particular emphasis on the latter two topics. Finally, the conclusions and future challenges are identified.
Highlights
Multiphase flows with heat and mass transfer exist widely in a variety of chemical applications, such as coal combustion, conversion and utilization of biomass, physical and chemical adsorption, chemical-loop combustion, fluidized beds, and heterogeneous catalytic reactions
The governing equations, the basic ideas, and different boundary conditions for the Immersed boundary (IB) methods are introduced. This is followed by numerical strategies, from which the IB methods are classified into two types, namely the artificial boundary method and the authentic boundary method
With the development of large-scale parallel computing and numerical algorithms, the IB method has emerged as a powerful tool for fully resolved simulations of multiphase transport phenomena in the recent decades
Summary
Multiphase flows with heat and mass transfer exist widely in a variety of chemical applications, such as coal combustion, conversion and utilization of biomass, physical and chemical adsorption, chemical-loop combustion, fluidized beds, and heterogeneous catalytic reactions These processes are usually quite complicated with multiscale and multiphysics couplings. Taking the particle–fluid interaction as an example, the momentum, temperature, and mass boundary layers can be formed at the surface of fuel particles from which the interphase transport phenomena occur, including the momentum, heat, and mass transfer processes that are driven by fluid mechanics, interphase temperature difference, and concentration difference, respectively These transport processes sometimes coexist with phase change and chemical reactions and can significantly alter an industrial system’s pressure drop, heat transfer efficiency, and operation stability. Understanding of these complicated processes is of paramount importance in the design and optimization of industrial reactors to achieve higher efficiency and lower pollution emission (Faghri and Zhang 2006)
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