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Fluid Flow and Effect of Turbulence Model on Large-Sized Triple-Offset Butterfly Valve [PDF]
Journal of Applied Fluid Mechanics, 2023 The performance a valve has been frequently estimated with numerical methods owing to limitations such as cost and place. In this study, for the triple-offset butterfly valves, the different sizes in various disc-opening cases was numerically conducted ...
M. S. Kim +4 more
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St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2022 In the paper, the results of RANS calculations of turbulent convection in silicon melt, obtained using several eddy-viscosity turbulence models, have been compared with previously published ILES eddy-resolving calculation data for similar conditions.
Borisov Dmitry, Kalaev Vladimir
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Aerospace, 2021 Accurate predictions of flow separation are important for aerospace design, flight accident avoidance, and the development of fluid mechanics. However, the complexity of the separation process makes accurate predictions challenging for all known Reynolds-
Ruijie Bai +3 more
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A new Reynolds stress algebraic equation model [PDF]
Computer Methods in Applied Mechanics and Engineering, 1995 A general turbulent constitutive relation is directly applied to propose a new Reynolds stress algebraic equation model. In the development of this model, the constraints based on rapid distortion theory and realizability (i.e. the positivity of the normal Reynolds stresses and the Schwarz' inequality between turbulent velocity correlations) are ...
Tsan-Hsing Shih +2 more
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Applications in Engineering Science, 2023 Flows of incompressible Navier–Stokes (Newtonian) fluids between adjacent surfaces are encountered in numerous practical applications, such as seal leakage and bearing lubrication.
Andreas Almqvist +3 more
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Wind turbine wake simulation with explicit algebraic Reynolds stress modeling [PDF]
Wind Energy Science, 2022 Reynolds-averaged Navier–Stokes (RANS) simulations of wind turbine wakes are usually conducted with two-equation turbulence models based on the Boussinesq hypothesis; these are simple and robust but lack the capability of predicting various turbulence ...
M. Baungaard +3 more
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Theoretical and Applied Mechanics Letters, 2023 A mapping function between the Reynolds-averaged Navier-Stokes mean flow variables and transition intermittency factor is constructed by fully connected artificial neural network (ANN), which replaces the governing equation of the intermittency factor in
Lei Wu, Bing Cui, Zuoli Xiao
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Large-Eddy Simulation of Turbulent Flow over Wavy Wall with Different Wave Steepness [PDF]
E3S Web of Conferences, 2021 Large-eddy simulation (LES) with dynamic one-equation subgrid-scale stress model was utilized to study the characteristics of turbulent flow over sea-surface generalized as two-dimensional wavy wall with different wave steepness.
Zhang Enwei +2 more
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Scientific Reports, 2021 With the aim for a low-aspect-ratio flying wing configuration, this study explores the influence of wall temperature gradient on the laminar and turbulent boundary layers of aircraft surface and determines the effect on the transition Reynolds number and
Peng Lin +6 more
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Mathematical Modelling of Heat Transfer in Pipes with Turbulators in the Laminar Region and in the Transition to Turbulent Flow [PDF]
E3S Web of Conferences, 2023 The article presents an analysis of mathematical modeling of heat transfer in pipes with turbulators at low Reynolds numbers characteristic of laminar and transient flow modes of heat carriers.
Lobanov Igor +2 more
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