Results 61 to 70 of about 9,992 (233)
The numerical simulation of the rope vortex creation and the possibilities of its control
Journal of Physics: Conference Series, 2021 Abstract The rope vortex is a phenomena which can be observed in many hydraulic machines, especially turbines and pump–turbines. Its creation is based on a non uniform velocity profile characterized by high value of the circumferential component.
P Szulc +3 more
openaire +1 more source
Advanced Intelligent Systems, EarlyView.Droplet‐based microfluidics enables precise, high‐throughput microscale reactions but continues to face challenges in scalability, reproducibility, and data complexity. This review examines how artificial intelligence enhances droplet generation, detection, sorting, and adaptive control and discusses emerging opportunities for clinical and industrial ...
Junyan Lai +10 more
wiley +1 more source
The origin of net electric currents in solar active regions
, 2015 There is a recurring question in solar physics about whether or not electric currents are neutralized in active regions (ARs). This question was recently revisited using three-dimensional (3D) magnetohydrodynamic (MHD) numerical simulations of magnetic ...
Aulanier, G. +5 more
core +3 more sources
The Complex Dynamics of the Precessing Vortex Rope in a Straight Diffuser
IOP Conference Series: Earth and Environmental Science, 2016 The decelerated swirling flow in the discharge cone of Francis turbines operated at partial discharge develops a self-induced instability with a precessing helical vortex (vortex rope). In an axisymmetric geometry, this phenomenon is expected to generate asynchronous pressure fluctuations as a result of the precessing motion.
Adrian Stuparu, Romeo Susan-Resiga
openaire +1 more source
Work Versus Force: Simultaneous Processes for Describing Interactions
Advanced Physics Research, EarlyView.ABSTRACT Achieving a unified description of interactions remains an open challenge in theoretical physics, which currently describes four fundamental forces. This situation may be viewed differently when interactions are formulated in terms of processes (work as actio) rather than forces (force as actio), not only at the macroscopic level but also at ...
Grit Kalies +2 more
wiley +1 more source
ActuatorsIn our previous research work, we investigated different methods to mitigate the vortex rope that appears in the draft tube of a Francis turbine when it operates at off-design operating points.
Constantin Tănasă +5 more
doaj +1 more source
Sunspot Rotation as a Driver of Major Solar Eruptions in NOAA Active Region 12158
, 2016 We studied the developing conditions of sigmoid structure under the influence of magnetic non-potential characteristics of a rotating sunspot in the active region (AR) 12158.
Cheng, X., Ravindra, B., Vemareddy, P.
core +1 more source
A Metabolomic Signature Predicts Gout Flare Clinical Outcome Associated With Colchicine Prophylaxis
Arthritis &Rheumatology, EarlyView.Objective This study investigated that serum metabolomics, before urate‐lowering therapy (ULT) initiation, could serve as a biomarker for responsiveness to colchicine prophylaxis in patients with gout commencing treat‐to‐target ULT. Methods We studied a multicenter prospective cohort (n = 409) initiating treat‐to‐target ULT plus colchicine prophylaxis.
Wenyan Sun +13 more
wiley +1 more source
How superfluid vortex knots untie
, 2015 Knotted and tangled structures frequently appear in physical fields, but so do mechanisms for untying them. To understand how this untying works, we simulate the behavior of 1,458 superfluid vortex knots of varying complexity and scale in the Gross ...
Irvine, William T. M. +2 more
core +1 more source
The physics of twisted magnetic tubes rising in a stratified medium: two dimensional results [PDF]
, 1997 The physics of a twisted magnetic flux tube rising in a stratified medium is studied using a numerical MHD code. The problem considered is fully compressible (no Boussinesq approximation), includes ohmic resistivity, and is two dimensional, i.e., there ...
Collins W. M. +7 more
core +2 more sources