Results 11 to 20 of about 58,423 (313)
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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Generative modeling of turbulence
Physics of Fluids, 2022 We present a mathematically well-founded approach for the synthetic modeling of turbulent flows using generative adversarial networks (GAN). Based on the analysis of chaotic, deterministic systems in terms of ergodicity, we outline a mathematical proof that GAN can actually learn to sample state snapshots from the invariant measure of the chaotic ...
C. Drygala +3 more
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Prediction of the Supersonic Flow Base Pressure by Axisymmetric Direct Numerical Simulation [PDF]
Journal of Applied and Computational Mechanics, 2023 Axisymmetric direct numerical simulation (DNS) has been carried out to predict supersonic base flow behavior. Substantially fine grid has been used to perform calculations for the flow with Reynolds number up to 106.
Sergey A. Karskanov +5 more
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Numerical simulation of JBC flow based on GEKO model
Zhongguo Jianchuan Yanjiu, 2022 ObjectivesTwo-equation models are the turbulence models most commonly used for RANS calculations in engineering applications. The SST k-ω turbulence model is self-adaptive of wall distance and capable of predicting adverse pressure gradient flows ...
Hui XU, Takanori HINO, Zuogang CHEN
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Burgers' Turbulence Models [PDF]
The Physics of Fluids, 1969 A detailed investigation of the stability of the solutions and the growth of secondary solutions beyond the critical points is carried out for the Burgers' model equations. It is found that the transitions at some critical points are very much like the intuitive description given by Landau; however, the possibility of finite jumps is also encountered.
Case, K. M., Chiu, S. C.
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Spherical model for turbulence [PDF]
Physical Review Letters, 1993 A new set of models for homogeneous, isotropic turbulence is considered in which the Navier-Stokes equations for incompressible fluid flow are generalized to a set of N coupled equations in N velocity fields. It is argued that in order to be useful these models must embody a new group of symmetries, and a general formalism is laid out for their ...
, Mou, , Weichman
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Augmented reduced order models for turbulence
Frontiers in Physics, 2022 The authors introduce an augmented-basis method (ABM) to stabilize reduced-order models (ROMs) of turbulent incompressible flows. The method begins with standard basis functions derived from proper orthogonal decomposition (POD) of snapshot sets taken ...
Kento Kaneko +3 more
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Numerical Simulation of Cavitation Phenomenon in the Stepped Spillway with Fluent Software [PDF]
پژوهشهای زیرساختهای عمرانی, 2020 In the present research, the effects of different turbulence models and cavitation phenomenon in the stepped spillway of Siah Bisheh dam was investigated using the FLUENT model. Three standard K-Epsilon, Renormalization Group (RNG) K-Epsilon, and K-Omega
Farideh Karimi Pirmoosaei +1 more
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Investigation of Turbulence Modeling for Point-Absorber-Type Wave Energy Converters
Energies, 2020 Reviewing the literature of CFD-based numerical wave tanks for wave energy applications, it can be observed that different flow conditions and different turbulence models are applied during numerical wave energy converter (WEC) experiments.
Christian Windt +2 more
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Effect of Mesh Shape and Turbulence Model on Aerodynamic Performance at NACA 4415 [PDF]
Journal of Applied Fluid Mechanics, 2023 This study uses three turbulence model variations, i.e., S - A, k - ε, and k – ω turbulence models. In addition, there are two variations of cell shape and three variations of cell number. The number of cells is 500, 5000, 50000, and 100000. Verification
J. Julian, W. Iskandar, F. Wahyuni
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