Results 21 to 30 of about 1,940 (222)
Journal of Engineering, 2023 The simulation have been made for 3D flow structure and heat transfer with and without longitudinal riblet upstream of leading edge vane endwall junction of first stage nozzle guide vane .The research explores concept of weakening the secondary ...
Najdat Nashat Abdulla +2 more
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Numerical simulation of turbulent channel flow with particle-adhered riblet surfaces
Journal of Fluid Science and Technology, 2023 Numerical simulations of particle laden and fully developed turbulent channel flows with rectangular riblet were performed to investigate the influence of particle adhesion on the drag reduction effect.
Chikara SHIMIZU +2 more
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Pharmacotherapeutic Management of Depression in Patients With Cancer: A Review of Mechanistic and Clinical Evidence. [PDF]
Cancer Rep (Hoboken)ABSTRACT Background Depression is a prevalent comorbidity in cancer, yet conventional treatments show inconsistent efficacy. This review sought to provide a mechanism‐based framework for managing cancer‐related depression by exploring its unique pathophysiology and evaluating promising pharmacotherapies based on their alignment with these biological ...
Hajivalizadeh S +4 more
europepmc +2 more sources
Microshape Control, Riblets, and Drag Minimization [PDF]
SIAM Journal on Applied Mathematics, 2013 Relying on the rugosity effect, we analyse the drag minimization problem in relation to the microstructure of the surface of a given obstacle. We construct a mathematical framework for the optimization problem, prove the existence of an optimal solution by $\Gamma$-convergence arguments, and analyze the stability of the drag with respect to the ...
Bucur, Dorin, Bonnivard, Matthieu
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Effect of Riblets Geometry on Drag Reduction [PDF]
Engineering and Technology Journal, 2010 The effect of longitudinal riblet surface models (U, V and semi-Circular and U with fillet corner riblets) on the performance of unsymmetrical airfoil (NACA23015) which has been investigated numerically and experimentally. Numerical investigation involve
Nibras M. Mahdi, Ikhlase M. Fayed
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Optical riblet sensor: Beam parameter requirements for the probing laser source [PDF]
, 2022 Art. 458, 13 S.Beam parameters of a probing laser source in an optical riblet sensor are studied by considering the high demands on a sensors' precision and reliability for the determination of deviations of the geometrical shape of a riblet.
Imlau, M. +5 more
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2011 The interaction of the overlying turbulent flow with riblets, and its impact on their drag reduction properties are analysed. In the so-called viscous regime of vanishing riblet spacing, the drag reduction is proportional to the riblet size, but for larger riblets the proportionality breaks down, and the drag reduction eventually becomes ...
García Mayoral, Ricardo +1 more
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Direct numerical simulation of turbulent flow above zigzag riblets
AIP Advances, 2018 We investigate the drag-reducing performance of a zigzag riblet inspired by the “Miura fold” and its influence on the streamwise vortices above a wall-bounded turbulent flow through direct numerical simulations of channel flows. The employed channel wall
Kie Okabayashi +3 more
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Turbulent structure effects due to ordered surface roughness
Alexandria Engineering Journal, 2020 The effects of ordered surface feature in the form of converging-diverging riblets are investigated experimentally on an airfoil. Riblet sheets are applied onto the surface of NACA 0026 airfoil at a yaw angle of α=0°,±10°, Riblet height of h = 1 mm, and ...
Zambri Harun +3 more
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International Journal of Thermofluids, 2022 In this paper the flow characteristics and velocity fields over the vertical axis wind turbines DU 06 W 200 airfoil developed by Delft University of Technology and some other innovative designs are examined by computational fluid dynamics (CFD ...
Omid Ali Zargar +6 more
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