Results 1 to 10 of about 35,410 (148)
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
doaj +1 more source
Experimental Study on Wake Characteristics of Secondary Grooved Cylinders with Different Depths [PDF]
Journal of Applied Fluid Mechanics, 2023 In this study, the flow field of a new secondary-grooved cylinder is determined by using particle image velocimetry (PIV) to understand the wake characteristics at different depths of the secondary grooved cylinders.
F. Peng, F. Yan, B. J. Yin, J. N. Liang
doaj +1 more source
Turbulence structures and sediment transport of different countermeasure roughness of the squire bridge pier [PDF]
مهندسی عمران شریف, 2022 Laboratory experiments were carried out to investigate the hydraulics, turbulence structure, and sediment removal capacity of bridge pier with different adjusted roughness.
Amin Mahmudi Moghadam +2 more
doaj +1 more source
Measurements of the Reynolds stress in the turbulent premixed flame
Nihon Kikai Gakkai ronbunshu, 2021 It has been shown in our previous study that the bi-modal distribution is seen in the radial component of the gas velocity obtained in the turbulent flame brush, implying that the shear component of the Reynolds stress conditioned on the unburnt mixture ...
Nobuhiro MAKITA +3 more
doaj +1 more source
Numerical simulation analysis of flow characteristics in the cavity of the rotor-stator system
Engineering Applications of Computational Fluid Mechanics, 2022 Investigating the flow characteristics in the cavity by changing the rotor profile of the rotor-stator system is of considerable significance, this paper simplifies clearance flow to rotor-stator cavity flow. The numerical simulation results are compared
Jianwei Shi +4 more
doaj +1 more source
Inner-outer decomposition of wall shear stress fluctuations in turbulent channels
Theoretical and Applied Mechanics Letters, 2022 Fluctuating wall shear stress in turbulent channel flows is decomposed into small-scale and large-scale components. The large-scale fluctuating wall shear stress is computed as the footprints of the outer turbulent motions, and the small-scale one is ...
Limin Wang, Ruifeng Hu
doaj +1 more source
Revisiting the Reynolds-averaged Navier–Stokes equations
Open Physics, 2022 This study revisits the Reynolds-averaged Navier–Stokes (RANS) equations and finds that the existing literature is erroneous regarding the primary unknowns and the number of independent unknowns in the RANS. The literature claims that the Reynolds stress
Sun Bohua
doaj +1 more source
Reynolds Stresses Derived from Simulations [PDF]
Symposium - International Astronomical Union, 1993 Three-dimensional simulations of convection are studied with specific attention to the effects of rotation and latitude on different quantities. The latitude-dependence of the strength of convection is found to decrease with increasing strength of the turbulence. The λ-effect is, however, still present also in a more turbulent case.
Pulkkinen, P. +4 more
openaire +1 more source
Intense Reynolds-stress events in turbulent ducts
International Journal of Heat and Fluid Flow, 2021 Abstract The aim of the present work is to investigate the role of intense Reynolds shear-stress events in the generation of the secondary flow in turbulent ducts. We consider the connected regions of flow where the product of the instantaneous fluctuations of two velocity components is higher than a threshold based on the long-time turbulence ...
Atzori M. +3 more
openaire +1 more source
Test problem of flow modelling in the Rotor 37 compressor stage
Авіаційно-космічна техніка та технологія, 2023 The subject of the study is the dependence of the degree of pressure increase on the airflow in the impeller of the axial compressor degree. The object of study is the Rotor 37 axial compressor.
Andrii Duliepov +4 more
doaj +1 more source