Global effect of local skin friction drag reduction in spatially developing turbulent boundary layer
, 2016 A numerical investigation of two locally applied drag reducing control schemes is carried out in the configuration of a spatially developing turbulent boundary layer (TBL).
Frohnapfel, B. +3 more
core +1 more source
Turbulent drag reduction in magnetohydrodynamic and quasi-static magnetohydrodynamic turbulence
, 2020 In hydrodynamic turbulence, the kinetic energy injected at large scales cascades to the inertial range, leading to a constant kinetic energy flux. In contrast, in magnetohydrodynamic (MHD) turbulence, a fraction of kinetic energy is transferred to the ...
Alam, Shadab +2 more
core +1 more source
Simulation analysis tentative scheme of drag reduction by additives in water cannon system
Zhongguo Jianchuan Yanjiu, 2019 [Objectives]In order to increase the range and flow rate of the water cannon system,drag reduction additive was introduced.[Methods]Firstly,the experimental results showed that the typical drag reduction additive was also effective for seawater system ...
Lin Peng +4 more
doaj +1 more source
Performance losses of drag-reducing spanwise forcing at moderate values of the Reynolds number
, 2013 A fundamental problem in the field of turbulent skin-friction drag reduction is to determine the performance of the available control techniques at high values of the Reynolds number $Re$.
Gatti, Davide, Quadrio, Maurizio
core +1 more source
Measurement of Drag Reduction in Dilute Polymer Solution Using Triboelectric Effect
Applied Rheology, 2018 In this paper, we present a novel method we have developed for measuring the drag reduction in a dilute polymer solution, based on the triboelectricity phenomenon.
Nsom Blaise, Latrache Noureddine
doaj +1 more source
Advances in Aerodynamics, 2023 Turbulence drag reduction is of great significance for the range increase of hypersonic flight vehicles. The proposed velocity-temperature coupling control method (Liu et al, Phys Rev Fluids 6:044603, 2021) is further extended to the hypersonic turbulent
Qiang Liu +4 more
doaj +1 more source
Analysis of Drag Reduction Methods and Mechanisms of Turbulent
Applied Bionics and Biomechanics, 2017 Turbulent flow is a difficult issue in fluid dynamics, the rules of which have not been totally revealed up to now. Fluid in turbulent state will result in a greater frictional force, which must consume great energy.
Gu Yunqing +4 more
doaj +1 more source
Shell Model for Drag Reduction with Polymer Additive in Homogeneous Turbulence
, 2003 Recent direct numerical simulations of the FENE-P model of non-Newtonian hydrodynamics revealed that the phenomenon of drag reduction by polymer additives exists (albeit in reduced form) also in homogeneous turbulence.
C.D. Dimitropoulos +14 more
core +1 more source
[18F]Fluorodeprenyl‐D2 PET as a Tool to Monitor Disease Activity in GAD65‐Ab Autoimmune Encephalitis
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To evaluate [18F]fluorodeprenyl‐D2 ([18F]F‐DED) positron‐emission tomography (PET) imaging as a biomarker of disease activity in autoimmune encephalitis (AIE) associated with glutamic acid decarboxylase 65 (GAD65) antibodies. Methods [18F]F‐DED PET was performed in 25 GAD65‐AIE patients and 8 controls using dynamic (0–60 min) and ...
Julia S. Dorneich +19 more
wiley +1 more source
Experimental Study on Drag Reduction Characteristics of Bionic Earthworm Self-Lubrication Surface
Applied Bionics and Biomechanics, 2019 In the present study, a coupling bionic method is used to study the drag reduction characteristics of corrugated surface with lubrication. In order to test the drag reduction features, bionic specimen was prepared inspired by earthworm surface and ...
Guomin Liu +4 more
doaj +1 more source