Results 21 to 30 of about 4,821 (295)

Design and manufacturing of roller bearing polymeric cages and development of a theoretical model for predicting the roller push-out force

open access: yesScientific Reports, 2022
In the present work, polymeric cages with 18 different pocket geometries are developed to investigate the effects of geometrical parameters and material properties on the amount of roller push-out force.
Alireza Zarei   +5 more
doaj   +1 more source

Thermal Performance Enhancement Using Absorber Tube with Inner Helical Axial Fins in a Parabolic Trough Solar Collector

open access: yesApplied Sciences, 2021
In the present work, a parabolic trough solar (PTC) collector with inner helical axial fins as swirl generator or turbulator is considered and analyzed numerically.
Mohammad Zaboli   +3 more
doaj   +1 more source

Essential Killing fields of parabolic geometries [PDF]

open access: yesIndiana University Mathematics Journal, 2013
50 pages.
Cap, Andreas, Melnick, Karin
openaire   +3 more sources

Thermal neutron albedo and flux for different geometries neutron guide

open access: yesNuclear Engineering and Technology, 2019
This paper presents a study on thermal neutron reflection properties of neutron guide for cylinder, spindle, elliptic and parabolic geometries using 241Am-Be neutron source (5.2 Ci) and BF3 detector, whereas neutron guide is important instrument for ...
S. Azimkhani   +2 more
doaj   +1 more source

ESERK Methods to Numerically Solve Nonlinear Parabolic PDEs in Complex Geometries: Using Right Triangles

open access: yesFrontiers in Physics, 2020
In this paper Extrapolated Stabilized Explicit Runge-Kutta methods (ESERK) are proposed to solve nonlinear partial differential equations (PDEs) in right triangles.
Jesús Martín-Vaquero
doaj   +1 more source

Jet-determination of symmetries of parabolic geometries [PDF]

open access: yes, 2017
We establish 2-jet determinacy for the symmetry algebra of the underlying structure of any (complex or real) parabolic geometry. At non-flat points, we prove that the symmetry algebra is in fact 1-jet determined.
Boris Kruglikov   +3 more
core   +1 more source

Multi-color laser excitation of diamond nitrogen vacancy centers embedded in nanophotonic structures

open access: yesAIP Advances, 2021
Negatively charged nitrogen vacancy centers (NV−) in diamond serve as highly sensitive, optically readable sensors for magnetic fields. Improved sensing approaches rely on NV− centers embedded in diamond nanopillar waveguides, which enable scanning probe
Axel Hochstetter, Elke Neu
doaj   +1 more source

Influence of Wear Profile Geometry on Critical Plane Fatigue Crack Initiation Criteria in Plane and Axisymmetric Elastic Fretting Contacts

open access: yesFrontiers in Mechanical Engineering, 2022
The subsurface elastic stress fields in plane and axisymmetric contacts with friction under oscillating tangential loading are calculated via a very robust, high-precision method, which operates with appropriate superpositions of analytic solutions for ...
Emanuel Willert
doaj   +1 more source

Organ-on-a-Chip: Design and Simulation of Various Microfluidic Channel Geometries for the Influence of Fluid Dynamic Parameters

open access: yesApplied Sciences, 2022
Shear stress, pressure, and flow rate are fluid dynamic parameters that can lead to changes in the morphology, proliferation, function, and survival of many cell types and have a determinant impact on tissue function and viability.
Francesca Pisapia   +2 more
doaj   +1 more source

Stochastic Modeling of Particle Transport in Confined Geometries: Problems and Peculiarities

open access: yesFluids, 2022
The equivalence between parabolic transport equations for solute concentrations and stochastic dynamics for solute particle motion represents one of the most fertile correspondences in statistical physics originating from the work by Einstein on Brownian
Giuseppe Procopio, Massimiliano Giona
doaj   +1 more source

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