Results 1 to 10 of about 12,205,950 (252)

Estimating flow fields with reduced order models

open access: yesHeliyon, 2023
The estimation of fluid flows inside a centrifugal pump in realtime is a challenging task that cannot be achieved with long-established methods like CFD due to their computational demands.
Kamil David Sommer   +4 more
doaj   +4 more sources

A Reduced Order Model to Predict Transient Flows around Straight Bladed Vertical Axis Wind Turbines

open access: yesEnergies, 2018
We develop a reduced order model to represent the complex flow behaviour around vertical axis wind turbines. First, we simulate vertical axis turbines using an accurate high order discontinuous Galerkin–Fourier Navier–Stokes Large Eddy Simulation solver ...
Soledad Le Clainche, Esteban Ferrer
doaj   +3 more sources

Tandem Cascade Flow Prediction by POD-RBFN Reduced Order Model

open access: yesHangkong gongcheng jinzhan, 2022
The cost of obtaining a large amount of flow field information by traditional experiment or CFD is unacceptable,so it is of significance to develop faster forecasting calculation methods.Proper orthogonal decomposition(POD)is used to extract the dominant
SHANG Xun   +3 more
doaj   +1 more source

Second order cyclic analysis of counter flow pulse tube refrigerator

open access: yesJournal of Thermal Engineering, 2023
Stirling machines are ecologically propitious refrigeration devices that utilize natural gases like helium, nitrogen, or air. Stirling machines are active refrigerators that should be designed with minimal vibrations and durability in order to fulfil ...
Mahmadrafik CHOUDHARI1   +4 more
doaj   +1 more source

Flow-induced order–order transitions in amyloid fibril liquid crystalline tactoids

open access: yesNature Communications, 2020
Tactoids are liquid crystal droplets with nearly vanishing interfacial tension. Almohammadi et al. show using a microfluidic focusing device how to manipulate them gently enough to facilitate the study of amyloid liquid crystal phase transitions subject ...
Hamed Almohammadi   +2 more
doaj   +1 more source

Radiation of higher order modes from circular ducts with flow

open access: yesActa Acustica, 2023
This work aims to predict the transfer function of a given modal content inside a circular duct with a bellmouth inlet in the presence of a mean flow. The transfer function is the relation in amplitude and phase between a given mode inside the duct and ...
Ford Courtney   +2 more
doaj   +1 more source

Lagrangian generic second order traffic flow models for node

open access: yesJournal of Traffic and Transportation Engineering (English ed. Online), 2018
This study sheds light on higher order macroscopic traffic flow modeling on road networks, thanks to the generic second order models (GSOM family) which embeds a myriad of traffic models.
Asma Khelifi   +3 more
doaj   +1 more source

Analytical Deriving of Second Order Model of Payne from First Order Lighthil-Whitham-Richards Model

open access: yesCybernetics and Information Technologies, 2013
Analytical deriving has been realized to obtain the second order Payne model from the first order Lighthil-Witham-Richards model.
Stoilova Vasilka   +2 more
doaj   +1 more source

Flow in a Channel with a Second-Order Fluid Under Transverse Flow Conditions [PDF]

open access: yesE3S Web of Conferences
We examine the linear stability of a second-order fluid flow between two parallel, porous plates, with uniform transverse flow. An analytical approach was developed to obtain the base solution for stationary flows of a slightly viscoelastic fluid, which ...
Lamine Mustapha   +2 more
doaj   +1 more source

Verification of flow velocity measurements using micrometer-order thermometers

open access: yesScientific Reports, 2021
In flow velocity measurements, resolution, miniaturization, and accuracy of measuring devices are important issues because the measuring devices significantly affect the flow in the micro-space, sonic flow, and turbulent flow.
Naoki Takegawa   +4 more
doaj   +1 more source

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