Results 31 to 40 of about 4,986 (224)

Effect of The Screw-Barrel Clearance and The Cooling Fan on Non-Wheat Noodle Extruder Performance [PDF]

open access: yesBIO Web of Conferences, 2023
This research was related to the development of technology for making non-wheat noodles. The process of making non-wheat noodles requires special treatment because of their different characteristics from wheat noodles.
Hanifah U, Taufan A, Sholichah E
doaj   +1 more source

Toroidal Vortices of Energy in Tightly Focused Second-Order Cylindrical Vector Beams

open access: yesPhotonics, 2021
In this paper, we simulate the focusing of a cylindrical vector beam (CVB) of second order, using the Richards–Wolf formula. Many papers have been published on focusing CVB, but they did not report on forming of the toroidal vortices of energy (TVE) near
Sergey S. Stafeev   +2 more
doaj   +1 more source

Hu Y. S., Wei H. J., Yu B., Yang O. X., Wang J., Wu J. Research on the vapor injection of two-stage rotary compressor / trans. from Engl. M. A. Fedorova [PDF]

open access: yesОмский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2021
In order to understand the vapor injection flow characteristics of two-stage rotary compressor in the course of compression, a mathematical model based on mass conservation equation, energy equation and thermodynamic identity was established and proved
M. A. Fedorova
doaj   +1 more source

A tangential regularization method for backflow stabilization in hemodynamics [PDF]

open access: yes, 2013
In computational simulations of fluid flows, instabilities at the Neumann boundaries may appear during backflow regime. It is widely accepted that this is due to the incoming energy at the boundary, coming from the convection term, which cannot be ...
Bertoglio, Cristóbal, Caiazzo, Alfonso
core   +2 more sources

Focusing fractional-order cylindrical vector beams

open access: yesКомпьютерная оптика, 2021
By numerically simulating the sharp focusing of fractional-order vector beams (0≤m≤1, with azimuthal polarization at m=1 and linear polarization at m=0), it is shown that the shape of the intensity distribution in the focal spot changes from elliptical ...
S.S. Stafeev, V.D. Zaitsev
doaj   +1 more source

Study on the Energy Loss Characteristics of Shaft Tubular Pump Device under Stall Conditions Based on the Entropy Production Method

open access: yesJournal of Marine Science and Engineering, 2023
This study aimed to reveal the energy loss characteristics of each part of the shaft tubular pump device (STPD) under stall conditions. Numerical simulations were conducted by using the SST k-ω turbulence model with curvature correction, and the ...
Dongtao Ji   +4 more
doaj   +1 more source

Energy flux of a vortex field focused using a secant gradient lens

open access: yesКомпьютерная оптика, 2020
In this paper we simulated the focusing of left circular polarized beam with a second order phase vortex and a second-order cylindrical vector beam by a gradient index Mikaelian lens.
A.G. Nalimov
doaj   +1 more source

Toroidal polarization vortices in tightly focused beams with singularity

open access: yesКомпьютерная оптика, 2020
In this paper, we numerically investigated tight focusing of cylindrical vector beams of the sec-ond order using Richards-Wolf formulae. It was shown that intensity rings where the Poynting vector was equal to zero appeared not only in the focal plane ...
S.S. Stafeev, V.V. Kotlyar
doaj   +1 more source

Quantum backflow in the presence of defects [PDF]

open access: yes, 2021
A physical quantity that is positive in classical physics can become negative in quantum physics, but it may be bounded. Quantum inequalities are lower bounds on averages of these physical quantities.
de Vasconcelos Junior, Alexandre Hefren
core  

Rational Design Strategy for Triboelectric Nanogenerators Based on Electron Back Flow and Ionic Defects: The Case of Polytetrafluoroethylene

open access: yesAdvanced Electronic Materials, 2023
The lack of theoretical understanding of triboelectrification has hindered the development of energy harvesting technologies like triboelectric nanogenerators.
Giulio Fatti   +10 more
doaj   +1 more source

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