Determination of integral turbulence model parameters as applied to calculation of rod-bundle flows in porous-body approximation

Vlasov, M. N.; Korsun, A. S.; Maslov, Yu. A.; Merinov, I. G.; Rachkov, V. I.; Kharitonov, V. S.

doi:10.1134/s0869864316020062

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…The last two Equations for the components of the effective stress and effective thermal conductivity tensors are united by the need to determine the integral coefficient of effective kinematic viscosity ν t i . This coefficient can be determined using the integral turbulence model [18].…”

Section: Closing Relations Of the Anisotropic Model Of A Porous Bodymentioning

confidence: 99%

“…Examples of the practical application of the developed model were not presented. Due to the shortcomings of the integral model of Pedras and de Lemos [7], it was decided to develop a different integral turbulence model [18], also based on the k−ε turbulence model [10].…”

Section: The State Of Work On the Development Of An Integral Turbulen...mentioning

confidence: 99%

“…The integral k−ε turbulence model [18] includes two equations for describing the transfer of the integral kinetic energy of turbulence k and its dissipation ε. The model was obtained by averaging over the space of the initial local equations of the standard k−ε turbulence model [10,24].…”

Section: Integral K−ε Turbulence Modelmentioning

confidence: 99%

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Application of an Integral Turbulence Model to Close the Model of an Anisotropic Porous Body as Applied to Rod Structures

Vlasov

Merinov

2022

Fluids

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In practice, often devices are ordered rod structures consisting of a large number of rods. Heat exchangers, fuel assemblies of nuclear reactors, and their cores in the case of using caseless assemblies are examples of such devices. Simulation of heat and mass transfer processes in such devices in porous-body approximation can significantly reduce the required resources compared to computational fluid dynamics (CFD) approaches. The paper describes an integral turbulence model developed for defining anisotropic model parameters of a porous body. The parameters of the integral turbulence model were determined by numerical simulations for assemblies of smooth rods, assemblies with spacer grids, and wire-wrapped fuel assemblies. The results of modeling the flow of a liquid metal coolant in an experimental fuel assembly with local blocking of its flow section in anisotropic porous-body approximation using an integral turbulence model are described. The possibility of using the model of an anisotropic porous body with the integral model of turbulence to describe thermal-hydraulic processes during fluid flow in rod structures is confirmed.

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Section: Closing Relations Of the Anisotropic Model Of A Porous Bodymentioning

confidence: 99%

Section: The State Of Work On the Development Of An Integral Turbulen...mentioning

confidence: 99%

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Application of an Integral Turbulence Model to Close the Model of an Anisotropic Porous Body as Applied to Rod Structures

Vlasov

Merinov

2022

Fluids

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Determination of integral turbulence model parameters as applied to the calculation of flows in fuel assemblies of fast reactors in porous-body approximation

Vlasov

Korsun

Maslov

et al. 2020

J. Phys.: Conf. Ser.

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This work aimed to correct the integral turbulence model developed earlier for assemblies of smooth rods. Two variants of the fuel assembly design were considered. In the first variant, the fuel rods were spaced using spacer grids. The presence of a spacer grid does not require a change in the form of the system of equations but leads to a change in the form of the resistance tensor and the generation of turbulence in the spacer grid region. In the second variant, a wire-wrapped fuel bundle was analyzed. The presence of a wire-wrapped fuel bundle requires an additional term in the equation for the conservation of momentum and change in the form of the resistance tensor. The simulations were obtained by CFD code ANSYS CFX and aimed at the determination of parameters involved in an integral model of turbulence being developed for modeling nuclear-reactor cores and heat exchangers in anisotropic porous-body approximation.

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Determination of the turbulence integral model parameters for a case of a coolant angular flow in regular rod-bundle

Bayaskhalanov

Vlasov

Korsun

et al. 2017

J. Phys.: Conf. Ser.

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Determination of integral turbulence model parameters as applied to calculation of rod-bundle flows in porous-body approximation

Cited by 7 publications

References 1 publication

Application of an Integral Turbulence Model to Close the Model of an Anisotropic Porous Body as Applied to Rod Structures

Application of an Integral Turbulence Model to Close the Model of an Anisotropic Porous Body as Applied to Rod Structures

Determination of integral turbulence model parameters as applied to the calculation of flows in fuel assemblies of fast reactors in porous-body approximation

Determination of the turbulence integral model parameters for a case of a coolant angular flow in regular rod-bundle

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