Modeling droplet-laden flows in moisture separators using k- d trees

Zhang, Huang; Liu, Qianfeng; Qin, Benke; Bo, Hanliang

doi:10.1016/j.anucene.2014.08.036

Cited by 29 publications

(11 citation statements)

References 16 publications

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“…As is depicted in Figure 2, the droplet will be in a state of equilibrium when the droplet's weight is equal to the sum of buoyant force and drag force 26

false(ρ_{l} ‐ ρ_{g} false) g V = ρ_{g} v_{g}^{2} S C_{normald} / 2

…”

Section: New Entrained Droplet Modelmentioning

confidence: 99%

A novel model for calculating critical droplet entrainment rate of gas well considering droplet deformation and multiple parameters

Xiao

Tan

et al. 2020

Energy Science & Engineering

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In most gas fields, depletion development has been widely employed, which caused formation pressure to decline, and as a result, the gas well production also decreases because the pressure is insufficient to continuously remove liquids from the gas well. The liquids, accumulating at the bottomhole and imposing an additional back pressure on the formation, further reduce the effective energy to remove the liquids and restricting well productivity; in severe cases, this may even

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“…As is depicted in Figure 2, the droplet will be in a state of equilibrium when the droplet's weight is equal to the sum of buoyant force and drag force 26

false(ρ_{l} ‐ ρ_{g} false) g V = ρ_{g} v_{g}^{2} S C_{normald} / 2

…”

Section: New Entrained Droplet Modelmentioning

confidence: 99%

A novel model for calculating critical droplet entrainment rate of gas well considering droplet deformation and multiple parameters

Xiao

Tan

et al. 2020

Energy Science & Engineering

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“…Next, the droplet-laden flow in the secondary separator is simulated by CZB algorithm firstly. The dynamic equation (seen in Equation (9)) of a single droplet is a system of ordinary differential equations [21]. Meanwhile, the collision kernel equals to 1.6 8π/3…”

Section: Working Mechanism Of Secondary Moisture Separator Of Ap1000mentioning

confidence: 99%

Simulating particle collision process based on Monte Carlo method

Zhang

Liu

Qin

et al. 2015

Journal of Nuclear Science and Technology

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Particle collision is non-trivial in many processes occurring in nuclear power system. A new particle collision algorithm has been carried out based on Monte Carlo approach under Lagrangian methodology. According to different collision kernel, the traveling time that a particle experiences between two neighborhood collision events is obtained in a more physical way than that in the current standard algorithm of O'Rourke. Besides, the outcomes of particle collision are acquired by proper collision models in choosing collision pairs, which are picked up by calculating the colliding times between two particles in each pair. To evaluate the performance of this new algorithm, first, a simulation for the total number changing with time of Brownian aerosols is compared with analytical solution. And the modeling result and the analytical formulation are in excellent agreement. Second, two mutual-impingement sprays are simulated by the new collision algorithm against that of O'Rourke. Then the modeling results are compared with experimental data, and it is found that the shapes of the mutual-impingement sprays obtained by the new algorithm are much better than that got by O'Rourke algorithm. Moreover, in order to investigate the working mechanism of the secondary moisture separator of AP1000, this new collision algorithm is applied to model the distribution of droplets moving in it. These modeling cases above show that the new collision algorithm is useful for numerical analysis, some kinds of particle-laden flows within particle collision process, such as sprays and droplet-steam flows, etc.

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“…The characteristics of the liquid film have attracted great attention, so in recent years, the film thickness has been studied both theoretically and practically (Ghiaasiaan et al, 1997;Luo and Ghiaasiaan, 1997;Drosos et al, 2004;Tan et al, 2008Tan et al, , 2009Han and Shikazono, 2010;Estrada-Pérez et al, 2011;Olgac and Muradoglu, 2013;Zhang et al, 2015aZhang et al, , 2015bZhang et al, , 2017Youn et al, 2018;, 2019cChen et al, 2019Chen et al, , 2020Wang et al, , 2020. Nusselt first theoretically analyzed the falling film, assuming that the continuous flow in the tube and the momentum effect on the falling film are negligible.…”

Section: Introductionmentioning

confidence: 99%

A technical review of research progress on thin liquid film thickness measurement

Wang

Chen

et al. 2019

Exp. Comput. Multiph. Flow

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The thickness of the thin liquid film and its effects have always been a research hotspot in nuclear power applications and operating nuclear power plants, because the flow phenomenon of the liquid film is extremely common in multiphase flow research. Based on papers published in recent years, novel research progress on thin film thickness is reviewed from the following two perspectives: the experimental measurement and the theoretical model of liquid film thickness. For the experimental measurement, methods mainly include the PLIF method, the capacitance method, and the ultrasonic method. The following contents in this part are mainly reviewed from the PLIF method, the capacitance method, the ultrasonic method, and other methods for the measurement of the liquid film thickness on the wall, the liquid film thickness on the tube wall, and other aspects of the liquid film thickness. For the model, the theoretical model of liquid film thickness on the wall is mainly reviewed from two aspects: vertical flow and horizontal flow. Other models are mainly reviewed from the following aspects. They are annular film thickness, liquid film thickness for gas-liquid annular flow, and film thickness in pipes.

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Modeling droplet-laden flows in moisture separators using k- d trees

Cited by 29 publications

References 16 publications

A novel model for calculating critical droplet entrainment rate of gas well considering droplet deformation and multiple parameters

A novel model for calculating critical droplet entrainment rate of gas well considering droplet deformation and multiple parameters

Simulating particle collision process based on Monte Carlo method

A technical review of research progress on thin liquid film thickness measurement

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