Direct Numerical Simulation of Reactive Fluid–Particle Systems Using an Immersed Boundary Method

In this paper, direct numerical simulation (DNS) is performed to study coupled heat and mass-transfer problems in fluid–particle systems. On the particles, an exothermic surface reaction takes place. The heat and mass transport is coupled through the particle temperature, which offers a dynamic boun...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2018-11, Vol.57 (45), p.15565-15578, Article acs.iecr.8b03158
Main Authors: Lu, Jiangtao, Tan, Michael D, Peters, Elias A. J. F, Kuipers, Johannes A. M
Format: Article
Language:English
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Summary:In this paper, direct numerical simulation (DNS) is performed to study coupled heat and mass-transfer problems in fluid–particle systems. On the particles, an exothermic surface reaction takes place. The heat and mass transport is coupled through the particle temperature, which offers a dynamic boundary condition for the thermal energy equation of the fluid phase. Following the case of the unsteady mass and heat diffusion in a large pool of static fluid, we consider a stationary spherical particle under forced convection. In both cases, the particle temperatures obtained from DNS show excellent agreement with established solutions. After that, we investigate the three-bead reactor, and finally a dense particle array composed of hundreds of particles distributed in a random fashion is studied. The concentration and temperature profiles are compared with a one-dimensional heterogeneous reactor model, and the heterogeneity inside the array is discussed.
ISSN:0888-5885
1520-5045
DOI:10.1021/acs.iecr.8b03158