Results 31 to 40 of about 6,223 (297)
Perturbed spiral real‐time phase‐contrast MR with compressive sensing reconstruction for assessment of flow in children [PDF]
Magnetic Resonance in Medicine, 2019 Purposewe implemented a golden‐angle spiral phase contrast sequence. A commonly used uniform density spiral and a new ‘perturbed’ spiral that produces more incoherent aliases were assessed. The aim was to ascertain whether greater incoherence enabled more accurate Compressive Sensing reconstruction and superior measurement of flow and velocity.MethodsA
Grzegorz Tomasz Kowalik +3 more
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Numerical modelling the air flow in parts of air jet loom
Computer Assisted Methods in Engineering and Science, 2023 Paper summarizes the first results of two-dimensional (2D) numerically modelled expansion and flow of compressible and non-viscous gas in typical parts of air jet weaving system; namely in main nozzle designed as an ejector with various shapes of the ...
Karel Adámek
doaj
Compressible two-dimensional turbulence: cascade reversal and sensitivity to imposed magnetic field
New Journal of Physics, 2023 We study the impact of compressibility on two-dimensional turbulent flows, such as those modeling astrophysical disks. We demonstrate that the direction of cascade undergoes continuous transition as the Mach number Ma increases, from inverse at Ma = 0 ...
Itzhak Fouxon +2 more
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Variational multiscale stabilization and local preconditioning for compressible flow [PDF]
, 2016 This thesis is about the stabilization of the numerical solution of the Euler and Navier- Stokes equations of compressible flow. When simulating numerically the flow equations, if no stabilization is added, the solution presents non-physical (but ...
Moragues Ginard, Margarida
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Real Gas Models in Coupled Algorithms Numerical Recipes and Thermophysical Relations
International Journal of Turbomachinery, Propulsion and Power, 2020 In the majority of compressible flow CFD simulations, the standard ideal gas state equation is accurate enough. However, there is a range of applications where the deviations from the ideal gas behaviour is significant enough that performance predictions
Lucian Hanimann +4 more
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Applied Sciences, 2022 Fluid film bearings lubricated with supercritical carbon dioxide (sCO2) eliminate the infrastructural requirement for oil lubricant supply and sealing in turbomachinery for sCO2 power systems.
Syed Muntazir Mehdi, Tae Ho Kim
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Numerical Simulation of Unsteady Flow and Calculation of Heat Transfer Coefficient inside the Solid Propellant Engine Shell [PDF]
فناوری در مهندسی هوافضاIn this study, the simulation of internal ballistics and the exhaust flow of a solid propellant engine have been investigated. The flow field considered in this problem including the cylindrical grain and the solid wall of the engine and the flow at the ...
Mohsen Esfandi, Mohammad Kazem Moayyedi
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An experimental method of characterization of deformable porous media
EPJ Web of Conferences, 2012 A porous medium saturated with liquid and placed within a medium that undergoes a change in pressure reacts by shrinking. If the space contains the same liquid as the pores of the sample, then after a certain lapse of time the sample dilates.
Sommier Alain +3 more
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A New Lumped Parameter Model for Natural Gas Pipelines in State Space
Energies, 2018 Many algorithms and numerical methods, such as implicit and explicit finite differences and the method of characteristics, have been applied for transient flow in gas pipelines.
Kai Wen +3 more
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Actuator Disk Theory for Compressible Flow
, 2017 Because compressibility effects arise in real applications of propellers and turbines, the Actuator Disk Theory or Froude’s Momentum Theory was established for compressible, subsonic flow using the three laws of conservation and isentropic thermodynamics.
Oo, Htet Htet Nwe
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