Comparisons of condensation models with non-condensable gases for computational fluid analyses

Sohn, Ji Hyun; Lee, J. R.; Bae, Sung Won; Hwang, Ji-Hwan; Jerng, Dong-Wook

doi:10.1063/5.0028146

Cited by 1 publication

(7 citation statements)

References 4 publications

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“…For instance, the two-fluid, three-field CUPID code has been designed to predict dynamic behavior and wall condensation in nuclear reactors. In comparison to commercial codes, CUPID offers a broader range of mass-flux-based single-phase models and two-phase fluid-film models. , Several software packages dedicated to discrete elemental simulations have also been created. Notably, the MFIX-DEM package finds popularity in the realm of chemical engineering due to its robust thermochemical simulation functionalities.…”

Section: Cfd Approaches For Phase Change Simulationmentioning

confidence: 99%

“…In certain scenarios, the single-phase model (SPM) is employed to simulate situations where noncondensable gases play a significant role in wall film condensation, such as emergency cooling of nuclear reactors. Resolving the thin liquid film can be computationally expensive, and in many cases, researchers simplify the two-phase condensation phenomenon to a single-phase (gas) phenomenon. , In the SPM, two approaches can be utilized to account for the effects of the thin film along the wall: (1) volumetric source terms in the near-wall cell and (2) face-flux at the condensing wall . The first approach involves incorporating volumetric source terms in the near-wall cell.…”

Section: Cfd Approaches For Phase Change Simulationmentioning

confidence: 99%

“…The first approach involves incorporating volumetric source terms in the near-wall cell. This can be achieved using different methods, including the mechanic model based on diffusion theory, semimechanistic models, and empirical correlation methods . These source terms capture the influence of the thin film on heat and mass transfer near the wall.…”

Section: Cfd Approaches For Phase Change Simulationmentioning

confidence: 99%

“…concluded that the face-fluxes approach is superior to the volumetric source terms approach in terms of convergence rate, mesh independence, and mass conservation. Sohn et al compared diffusion-based mechanistic ( ), heat and mass transfer analogy ( ), and empirical ( ) wall condensation closures for mass flux calculation, which indicated that the mechanic model could be applied to a wider range of situations at the cost of computational time. It may be more efficient to use an empirical correlation method and a semimechanistic model for a particular condition if they are applicable.…”

Section: Phase Change For Thermal Management (Tm)mentioning

confidence: 99%

“…This can be achieved using different methods, including the mechanic model based on diffusion theory, semimechanistic models, and empirical correlation methods. 38 These source terms capture the influence of the thin film on heat and mass transfer near the wall. The second approach involves considering face-flux at the condensing wall, which accounts for the condensation effects on the fluid flow and heat transfer near the wall.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

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Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Zhu

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Phase change is a phenomenon that has been extensively utilized in chemical engineering, energy, electronics, vehicle, and space exploration. From both the science and engineering perspectives, gaining a profound understanding of the intricacies of multiphase flow processes accompanied by heat and mass transfer due to phase change is of fundamental importance. Indeed, the computational fluid dynamics (CFD) has been increasingly applied as an effective tool to give an in-depth and efficient analysis of the phase change processes, thereby enhancing our understanding and capacity to control and optimize the phase change effects in these processes. This paper seeks to provide a comprehensive review of the utilization of CFD methodologies in the simulations of phase change flows across various applications, including temperature management, drying, separation and purification, and others. First, the CFD models at various scales that are developed to elucidate the phase change processes are summarized. Second, the noteworthy advances in the recent CFD simulation work on various phase change processes are presented, respectively. Finally, the challenges and potential prospects to facilitate the application of the phase change flow are discussed. The current review aims to offer insightful guidance for the CFD modeling of phase change processes in numerous engineering application scenarios.

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Section: Cfd Approaches For Phase Change Simulationmentioning

confidence: 99%