A CFD model of frost formation based on dynamic meshes technique via secondary development of ANSYS fluent

You, Yonghua; Wang, Sheng; Lv, Wei; Chen, Yuanyuan; Groß, Ulrich

doi:10.1016/j.ijheatfluidflow.2021.108807

Cited by 37 publications

(6 citation statements)

References 29 publications

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“…The Fluent model for dynamic mesh enables the simulation of flow phenomena involving temporal changes in the fluid domain due to either boundary deformation or rigid motion. The flow field of a conservative dynamic mesh is Equation ( 7): [24,25] d dt…”

Section: Turbulence Modelmentioning

confidence: 99%

Flow Field Analysis and Performance Study of a Hydrogen Circulation Pump for Proton Exchange Membrane Fuel Cell Vehicles with Different Working Clearances

Liang,

Pang,

Liu

et al. 2024

Energy Tech

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This study investigates the impact of working clearances on the internal flow field, pressure pulsations, flow pulsations, and radial forces experienced by a hydrogen circulation pump. Numerical calculations are conducted on seven sets of distinct working clearances for the pump. The research findings demonstrate that an increase in meshing clearance and radial clearance results in higher leakage flow rate during the compression exhaust process, leading to a decrease in hydrogen circulation pump's exhaust flow rate. When the meshing clearance increases from 0.15 to 0.21 mm, the actual exhaust flow rate of the pump decreases from 37.46 to 32.73 m3 h−1. Similarly, when the radial clearance increases from 0.18 to 0.24 mm, the actual exhaust flow rate of the pump decreases from 42.46 to 29.71 m3 h−1. Additionally, with an increase in meshing clearance, both the radial forces Fx and Fy of the active rotor exhibit a downward trend. Yet, as radial clearance grows, the radial force Fx slightly descends, while the change trend of radial force Fy is first positive decrease and then reverse increase.

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Section: Turbulence Modelmentioning

confidence: 99%

Flow Field Analysis and Performance Study of a Hydrogen Circulation Pump for Proton Exchange Membrane Fuel Cell Vehicles with Different Working Clearances

Liang,

Pang,

Liu

et al. 2024

Energy Tech

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show abstract

“…The finer meshes facilitate a better precision. Meanwhile, they could increase computation load and worsen numerical stability [20]. Dense uniform and well-distributed meshes with size of 0.5 mm-2 mm are chosen and the total number of meshes are 19,194,909,12,047,960 and 7,484,211 in WCS, WGS and sector structure with software ANSYS, respectively.…”

Section: Computational Domain Mesh Quality and Boundary Conditionsmentioning

confidence: 99%

Three-dimensional temperature and stress field simulation with all-hexahedral element mesh in a high efficiency cooling structure for the fabrication of amorphous ribbons

Chen

Shen

et al. 2022

Mater. Res. Express

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Planar flow casting is an advanced technology to produce amorphous and nanocrystalline ribbons in electrical application. At present, the utilization rate of roller surface is generally under 20% in industrial production. This work reports a new cooling structure that is designed to produce ribbons width 65mm with the utilization rate of roller surface up to 65%. The cooling structure is simulated with the software ANSYS by employing three-dimensional temperature and stress field mathematic model incorporating actual production conditions with all-hexahedral element mesh. It is shown that the liquid velocity is uniform with consistent distribution of convective heat transfer coefficient in width direction between cooling water and rotating roller. The thermal expansion difference in the new cooling structure is only 0.0042mm at the ribbon edge. In this case, it is unnecessary to make the slit with an upward bend. The new cooling structure is expected to be applied for industrial production at an ideal level.

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“…Water vapors in the air first condense into droplets and then freeze into frost crystals, i.e., condensation frost. In comparison, in hoarfrost formation, water vapors directly appear from a gaseous state as frost crystals and grow into a frost layer [4]. The Gibbs Free Energy (GFE) barrier must be overcome in both condensation frost and hoarfrost formations.…”

Section: Formation Mechanism Of Frost and Dew; Application Status Of ...mentioning

confidence: 99%

Review on the Application of Machine Vision in Defrosting and Decondensation on the Surface of Heat Exchanger

et al. 2022

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Under low outdoor temperature and high humidity, frost easily forms on the Heat Exchanger (Exchanger) surface on the outdoor side. The formation and growth of this frost layer will seriously impact the Exchanger’s heat extraction process and the system’s energy efficiency, triggering malfunction in the compressor. To this end, this work first analyzes the formation and growth mechanism of Exchanger surface frosting and condensation. It then summarizes the current research status of Machine Vision (MV) technology in defrosting and decondensation. Further, it previews the follow-up research direction. The experimental findings show that MV technology can automatically observe frost and dew, guaranteeing a real-time understanding of the frost layer. Directly obtaining the frost and dew information from the image can significantly save human resources and improve efficiency.

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A CFD model of frost formation based on dynamic meshes technique via secondary development of ANSYS fluent

Cited by 37 publications

References 29 publications

Flow Field Analysis and Performance Study of a Hydrogen Circulation Pump for Proton Exchange Membrane Fuel Cell Vehicles with Different Working Clearances

Flow Field Analysis and Performance Study of a Hydrogen Circulation Pump for Proton Exchange Membrane Fuel Cell Vehicles with Different Working Clearances

Three-dimensional temperature and stress field simulation with all-hexahedral element mesh in a high efficiency cooling structure for the fabrication of amorphous ribbons

Review on the Application of Machine Vision in Defrosting and Decondensation on the Surface of Heat Exchanger

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