Results 11 to 20 of about 26,103 (305)
Helicity and vortex generation [PDF]
Annals of Physics, 2018 In this paper we have continued the calculations made recently concerning he generalization of the minimal coupling prescription. We have obtained the Navier-Stokes equation for the charged fluid embedded into an electromagnetic field. We have analyzed the wave feature of the fields.
Mendes, Albert C. R. +5 more
openaire +3 more sources
Results in Engineering, 2022 Improvement of the convection heat transfer coefficient of the airflow has become a concern nowadays to increase the rate of heat transfer. Therefore, the present study is focused on evaluating the improvement of heat transfer numerically from several ...
Syaiful +4 more
doaj +1 more source
Rekayasa Mesin, 2020 Fin and tube heat exchangers use gas as a cooling/heating medium on the fin side. The low thermal conductivity of gases results in high thermal resistance, which results in a low rate of heat transfer.
Syaiful Syaiful +3 more
doaj +1 more source
Research Progress on Supersonic Mixing Enhanced by Vortex Generators [PDF]
Hangkong bingqiEfficient mixing of fuel and air under supersonic conditions is important for achieving efficient combustion in scramjet and combined-cycle combustion chambers.
Xie Haiwei, Zhang Dongdong, Wang Pengren, Xu Zheng, Tan Jianguo
doaj +1 more source
Generation of multiterawatt vortex laser beams [PDF]
Applied Optics, 2014 13 pages, 7 ...
Ament, Craig +5 more
openaire +3 more sources
Design of Solar-powered Endurance Glider with Vortex Generators [PDF]
Renewable Energy Research and Applications, 2021 The research aims at designing a solar endurance glider for an increased flight time. The constraints for design include reduction in weight compared to a typical glider and improving its aerodynamic performance by application of vortex generators on its
Sh. Sham Dol +4 more
doaj +1 more source
Proceeding of First Symposium on Turbulence and Shear Flow Phenomena, 1999 Abstract Vortex generating jets (VGJs) are jets that pass through a wall and into a crossflow to create a dominant streamwise vortex that remains embedded in the boundary layer over the wall. The VGJ is characterized by its pitch and skew angles (Φ and Θ) and the velocity ratio (VR) between the jet and the crossflow. For VR=1.0, the VGJ configuration
Zia U. Khan, James P. Johnston
openaire +1 more source
Generation of Nonlinear Vortex Precursors
Physical Review Letters, 2016 We numerically study the propagation of a few-cycle pulse carrying orbital angular momentum (OAM) through a dense atomic system. Nonlinear precursors consisting of high-order vortex har- monics are generated in the transmitted field due to ultrafast Bloch oscillation.
Chen, Yue-Yue +2 more
openaire +4 more sources
Generalized helical vortex pairs [PDF]
Journal of Fluid Mechanics, 2019 New solutions describing the interaction of helical pairs of counter-rotating vortices are obtained using a vortex filament approach. The vortices are assumed to have a small core size allowing the calculation of the self-induced velocities from the Biot–Savart law using the cutoff theory. These new vortex structures do not possess any helical symmetry
E. Durán Venegas, S. Le Dizès
openaire +6 more sources
Advances in Mechanical Engineering, 2015 A numerical and experimental study was conducted for heat transfer enhancement and fluid flow in a constant heat-fluxed rectangular wooden duct fitted with two shapes of vortex generators (circular and square).
Kutiaba JM Al-khishali, Munzer SY Ebaid
doaj +1 more source