Numerical study on the dissipation mechanisms in sloshing flows induced by violent and high-frequency accelerations. I. Theoretical formulation and numerical investigation

2021 ◽  
Vol 6 (11) ◽  
Author(s):  
S. Marrone ◽  
A. Colagrossi ◽  
F. Gambioli ◽  
L. González-Gutiérrez
Keyword(s):  
Numerical Investigation ◽  
High Frequency ◽  
Numerical Study ◽  
Theoretical Formulation

An experimental and numerical study of high-frequency Raman scattering in argon gas

1993 ◽  
Vol 173 (2) ◽  
pp. 153-159 ◽  
Author(s):  
François Chapeau-Blondeau ◽  
Victor Teboul ◽  
Jacques Berrué ◽  
Yves le Duff
Keyword(s):  
Raman Scattering ◽  
High Frequency ◽  
Numerical Study ◽  
Argon Gas

Efficient Finite Element for Evaluation of Strain Concentrations in Concrete Coated Pipelines

2008 ◽  
Author(s):  
Svein Sævik ◽  
Martin Storheim ◽  
Erik Levold
Keyword(s):  
Finite Element ◽  
Numerical Study ◽  
Sandwich Beam ◽  
Beam Theory ◽  
Material Model ◽  
Body Motion ◽  
Theoretical Formulation ◽  
Concrete Material ◽  
Non Linear ◽  
Full Scale Tests

MARINTEK has developed software for detailed analysis of pipelines during installation and operation. As part of the software development a new coating finite element was developed in cooperation with StatoilHydro enabling efficient analysis of field joint strain concentrations of long concrete coated pipeline sections. The element was formulated based on sandwich beam theory and application of the Principle of Potential Energy. Large deformations and non-linear geometry effects were handled by a Co-rotated “ghost” reference description where elimination of rigid body motion was taken care of by referring to relative displacements in the strain energy term. The non-linearity related to shear interaction and concrete material behaviour was handled by applying non-linear springs and a purpose made concrete material model. The paper describes the theoretical formulation and numerical studies carried out to verify the model. The numerical study included comparison between model and full-scale tests as well as between model and other commercial software. At last a 3000 m long pipeline was analysed to demonstrate the strain concentration behaviour of a concrete coated pipeline exposed to high temperature snaking on the seabed.

Numerical Investigation of a Stiffened Panel Subjected to Low Velocity Impacts

2015 ◽  
Vol 665 ◽  
pp. 277-280 ◽  
Author(s):  
Aniello Riccio ◽  
S. Saputo ◽  
A. Sellitto ◽  
A. Raimondo ◽  
R. Ricchiuto
Keyword(s):  
Numerical Investigation ◽  
Composite Laminates ◽  
Mechanical Response ◽  
Numerical Study ◽  
Fem Analysis ◽  
Matrix Cracking ◽  
Stiffened Panel ◽  
Low Velocity ◽  
Formation And Evolution ◽  
The Impact

The investigation of fiber-reinforced composite laminates mechanical response under impact loads can be very difficult due to simultaneous failure phenomena. Indeed, as a consequence of low velocity impacts, intra-laminar damage as fiber and matrix cracking and inter-laminar damage, such as delamination, often take place concurrently, leading to significant reductions in terms of strength and stability for composite structure. In this paper a numerical study is proposed which, by means of non-linear explicit FEM analysis, aims to completely characterize the composite reinforced laminates damage under low velocity impacts. The numerical investigation allowed to obtain an exhaustive insight on the different phases of the impact event considering the damage formation and evolution. Five different impact locations with the same impact energy are taken into account to investigate the influence on the onset and growth of damage.

scholarly journals Observation and a numerical study of gravity waves during tropical cyclone Ivan~(2008)

2013 ◽  
Vol 13 (4) ◽  
pp. 10757-10807 ◽  
Author(s):  
F. Chane Ming ◽  
C. Ibrahim ◽  
S. Jolivet ◽  
P. Keckhut ◽  
Y.-A. Liou ◽  
...  
Keyword(s):  
Tropical Cyclone ◽  
Gravity Waves ◽  
High Frequency ◽  
Lower Stratosphere ◽  
Numerical Study ◽  
Wide Spectrum ◽  
Spectral Characteristics ◽  
Background Wind ◽  
Quasi Biennial Oscillation ◽  
North East

Abstract. Activity and spectral characteristics of gravity-waves (GWs) are analyzed during tropical cyclone (TC) Ivan (2008) in the troposphere and lower stratosphere using radiosonde and GPS radio occultation data, ECMWF outputs and simulations of French numerical model Meso-NH with vertical resolution varying between 150 m near the surface and 500 m in the lower stratosphere. Conventional methods for GW analysis and signal and image processing tools provide information on a wide spectrum of GWs with horizontal wavelengths of 40–1800 km and short vertical wavelengths of 0.6–10 km respectively and periods of 20 min–2 days. MesoNH model, initialized with Aladin-Réunion analyses, produces realistic and detailed description of TC dynamics, GWs, variability of the tropospheric and stratospheric background wind and TC rainband characteristics at different stages of TC Ivan. In particular a dominant eastward propagating TC-related quasi-inertia GW is present during intensification of TC Ivan with horizontal and vertical wavelengths of 400–600 km and 1.5–3.5 km respectively during intensification. A wavenumber-1 vortex Rossby wave is identified as a source of this medium-scale mode while short-scale modes located at north-east and south-east of the TC could be attributed to strong localized convection in spiral bands resulting from wavenumber-2 vortex Rossby waves. Meso-NH simulations also reveal high-frequency GWs with horizontal wavelengths of 20–80 km near the TC eye and high-frequency GWs-related clouds behind TC Ivan. In addition, GWs produced during landfall are likely to strongly contribute to background wind in the middle and upper troposphere as well as the stratospheric quasi-biennial oscillation.

scholarly journals Experimental and numerical investigation into rapid cooling of rock salt related to high frequency cycling of storage caverns

2018 ◽  
Vol 102 ◽  
pp. 120-130 ◽  
Author(s):  
Laura Blanco-Martín ◽  
Ahmed Rouabhi ◽  
Joël Billiotte ◽  
Faouzi Hadj-Hassen ◽  
Bruno Tessier ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Rock Salt ◽  
High Frequency ◽  
Rapid Cooling

Experimental and numerical study of high frequency superconducting air-core transformer

2021 ◽  
Author(s):  
Guanjie Liu ◽  
GuoMin Zhang ◽  
Guole Liu ◽  
Liwei Jing ◽  
Haonan Wang
Keyword(s):  
High Frequency ◽  
Numerical Study ◽  
Air Core

Numerical investigation of high-frequency pulsating electrohydrodynamic jet at low electric Bond numbers

2022 ◽  
Vol 34 (1) ◽  
pp. 012001
Author(s):  
Yin Guan ◽  
Shuang Wu ◽  
Mengduo Wang ◽  
Yu Tian ◽  
Chuanpeng Yu ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
High Frequency

Numerical study on increasing mass flow ratio by energy deposition of high frequency pulsed laser

2013 ◽  
Vol 25 (7) ◽  
pp. 1715-1718 ◽  
Author(s):  
王殿恺 Wang Diankai ◽  
洪延姬 Hong Yanji ◽  
李倩 Li Qian
Keyword(s):  
Mass Flow ◽  
High Frequency ◽  
Energy Deposition ◽  
Numerical Study ◽  
Pulsed Laser ◽  
Flow Ratio ◽  
Mass Flow Ratio
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