Numerical Investigation of the Drag Force of Interactive Particles in Supercritical Water

Li, Xiaoyü; Wang, Huibo; Zhang, Mingyue; Jin, Hui

doi:10.1021/acs.iecr.2c01208

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…Table 3 shows the previous SCW flow around particle validation conclusions of our research group studies, 31,32 Wei et al, 22,38 and Zhang et al, 27,28 which shows the accuracy and reliability of the numerical model. Our group's previous studies 34,35,39 further showed more details for the multi-particle system. In summary, the accuracy of the calculation method adopted in this paper is verified, and it can be used in the subsequent numerical simulation calculation studies related to the particle layer.…”

Section: Numerical Model Validationmentioning

confidence: 86%

“…Our group had previously conducted studies on the drag force and heat transfer of single and two particles in SCW with different particle characteristics and considered the effect of Stefan flow, ,,,− which does not address the issues of particles in a cluster situation. In this work, we adopt the multi-particle layer consisting of several individual particles with different particle layer solid holdups to simplify the multi-particle composition structure in the dense particle-laden flows, and the simulations resolve the flow field around each particle.…”

Section: Introductionmentioning

confidence: 99%

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Direct Numerical Simulation of Fluid Flow and Heat Transfer of a Reactive Particle Layer with Stefan Flow in Supercritical Water

Wang

Jin

2023

Ind. Eng. Chem. Res.

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Supercritical water gasification is an efficient and clean way of energy conversion. The research on different scales, such as the system, reactor, and particle, has different temporal and spatial significance. A study on particle−particle and particle− fluid−particle interaction on the particle scale has a fundamental guiding value for revealing gasification performance on the reactor scale. Reactive particles such as coal are pyrolyzed and gasified in a high-temperature and high-pressure reactor to form Stefan flow, which affects the mass, momentum, and energy transfer between particles and supercritical water. In this paper, a particle-resolved direct numerical simulation study of a reactive particle layer in supercritical water is carried out to investigate the effect of different particle layer solid holdups and Stefan flow intensities and distributions on the flow and heat transfer process between the particle layer and supercritical water. This work analyzes the pressure and friction drag coefficients to which the particles are subjected and specifies the flow, velocity, and temperature distribution inside and around the particle layer. The results show that the drag coefficient and Nusselt number of particles in the particle layer decrease gradually along the flow direction, and the presence of particle Stefan flow further reduces the drag force and Nusselt number of particles. With the increasing solid holdup of the particle layer, the particle−fluid−particle interaction becomes more intense, and the effect of Stefan flow cannot be negligible.

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