Correlation for cross-flow resistance coefficient using STAR-CCM+ simulation data for flow of water through rod bundle supported by spacer grid with split-type mixing vane

Agbodemegbe, Vincent Yao; Xu, Cheng; Akaho, E.H.K.; Allotey, F.K.A

doi:10.1016/j.nucengdes.2015.01.003

Cited by 20 publications

(8 citation statements)

References 22 publications

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“…Using this methodology, the results of the heat transfer calculation related to the minichannel heat sink performed in the Simcenter Star-CCM+ software were described in [20]. Furthermore, when comparing the results with those of other authors who applied rectangular minichannels in heat exchanger construction, it can be noticed that the results are similar in the "hot" minichannel as in works [14,15,[26][27][28][29][30][31][32].…”

Section: Cfd Calculation Resultsmentioning

confidence: 97%

“…A two-fluid model coupled with an extended wall boiling model was used to simulate DNB in vertical heated tubes with both uniform and nonuniform heat fluxes. In [15] in order to obtain data to correlate cross-flow resistance coefficient, a computational fluid dynamic simulation using Star-CCM+ was performed for the flow of water through a 5 × 5 rod bundle geometry supported by a spacer grid with split mixing. The two layer k-epsilon turbulence model was used with an all y+ automatic wall treatment function in Simcenter STAR-CCM+.…”

Section: Introductionmentioning

confidence: 99%

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Conception of minichannel cooling for a PVT heat exchanger

Strąk,

Piasecka

2022

EPJ Web Conf.

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In the paper, a new construction of a compact plate heat exchanger dedicated to PVT cooling was numerically tested. The efficiency of photovoltaic panels decreases as their temperature increases, but cooling improves efficiency. A model counter-current heat exchanger with rectangular minichannels was presented. A heated wall of the heat exchanger was a photovoltaic cell. There were laminar flows of Fluorinert FC-72 and distilled water in the minichannels. FC-72 was heated by the photovoltaic panel. The CAD model of a minichannel heat exchanger was proposed. CFD calculations were performed using Simcenter STAR-CCM+ software. The fluid temperature and velocity profile in the minichannels were determined to finally obtain the values of the heat transfer coefficient. The main parameters taken into consideration in the computations concerned: meshes, physics, and geometry. Finally, local heat transfer coefficients were determined.

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Section: Cfd Calculation Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Conception of minichannel cooling for a PVT heat exchanger

Strąk,

Piasecka

2022

EPJ Web Conf.

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“…In order to model the stress tensor, the Reynolds stress transport models and Boussinesq approximation (which is an eddy viscosity model) were employed. Further details can be found in [34,35].…”

Section: Governing Transport Equations In the Cfd Modelmentioning

confidence: 99%

Computational fluid dynamics modeling for performance assessment of permeate gap membrane distillation

Yazgan‐Birgi

Ali

Swaminathan

et al. 2018

Journal of Membrane Science

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“…Agbodemegbe et al (2015) [28] utilized the CFD code STAR-CCM+ to model crossflow across subchannel gaps and compare the predicted results with experimental data. The rod bundle, a 5x5 rod layout, utilized spacer grids with mixing vanes.…”

Section: Numerical Studies On Spacer Grid Effects On Flow Patterns Anmentioning

confidence: 99%

Development and Implementation of CFD-Informed Models for the Advanced Subchannel Code CTF

Blyth¹

2017

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The research described in this PhD thesis contributes to the development of efficient methods for utilization of high-fidelity models and codes to inform low-fidelity models and codes in the area of nuclear reactor core thermal-hydraulics. The objective is to increase the accuracy of predictions of quantities of interests using high-fidelity CFD models while preserving the efficiency of low-fidelity subchannel core calculations. An original methodology named Physicsbased Approach for High-to-Low Model Information has been further developed and tested. The overall physical phenomena and corresponding localized effects, which are introduced by the presence of spacer grids in light water reactor (LWR) cores, are dissected in corresponding four building basic processes, and corresponding models are informed using high-fidelity CFD codes. These models are a spacer grid-directed cross-flow model, a grid-enhanced turbulent mixing model, a heat transfer enhancement model, and a spacer grid pressure loss model. The localized CFD-models are developed and tested using the CFD code STAR-CCM+, and the corresponding global model development and testing in sub-channel formulation is performed in the thermalhydraulic subchannel code CTF. The improved CTF simulations utilize data-files derived from CFD STAR-CCM+ simulation results covering the spacer grid design desired for inclusion in the CTF calculation. The current implementation of these models is examined and possibilities for improvement and further development are suggested. The validation experimental database is extended by including the OECD/NRC PSBT benchmark data. The outcome is an enhanced accuracy of CTF predictions while preserving the computational efficiency of a low-fidelity subchannel code. v

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Correlation for cross-flow resistance coefficient using STAR-CCM+ simulation data for flow of water through rod bundle supported by spacer grid with split-type mixing vane

Cited by 20 publications

References 22 publications

Conception of minichannel cooling for a PVT heat exchanger

Conception of minichannel cooling for a PVT heat exchanger

Computational fluid dynamics modeling for performance assessment of permeate gap membrane distillation

Development and Implementation of CFD-Informed Models for the Advanced Subchannel Code CTF

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