Results 121 to 130 of about 373,804 (364)
Energy Science &Engineering, EarlyView.Based on entropy theory, this study presents a comparative numerical analysis of the flow energy dissipation (FED) in a VTSP under two distinct operating conditions: pump condition and turbine condition, both characterized by relatively high hydraulic efficiencies of 88.9% and 87.4%, respectively. In pump condition, the highest FED production occurs in
S. Liu +5 more
wiley +1 more source
Energy spectra of vortex distributions in two-dimensional quantum turbulence
, 2012 We theoretically explore key concepts of two-dimensional turbulence in a homogeneous compressible superfluid described by a dissipative two-dimensional Gross-Pitaeveskii equation. Such a fluid supports quantized vortices that have a size characterized by
Anderson, Brian P., Bradley, Ashton S.
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Turbulent flow over random sphere packs – kinetic energy budgets
Journal of Fluid MechanicsBased on data from pore-resolved direct numerical simulation of turbulent flow over mono-disperse random sphere packs, we evaluate the budgets of the double-averaged turbulent kinetic energy (TKE) and the wake kinetic energy (WKE). While TKE results from temporal velocity fluctuations, WKE describes the kinetic energy in spatial variations of the time ...
S. v.Wenczowski, M. Manhart
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Estimation of the GCV of Coal Using Real‐Time Plant Data
Energy Science &Engineering, EarlyView.ABSTRACT Online or real‐time strategies of estimating the gross calorific value (GCV) of coal are still not fully explored in academic literature, even though both conventional and sophisticated offline methods for estimating the GCV are well described.
Lethukuthula Nokwazi Vilakazi +1 more
wiley +1 more source
Enhanced Energy Conversion by Turbulence in Collisionless Magnetic Reconnection
The Astrophysical JournalMagnetic reconnection and turbulence are two of the most significant mechanisms for energy dissipation in collisionless plasma. The role of turbulence in magnetic reconnection poses an outstanding problem in astrophysics and plasma physics.
Runqing Jin +6 more
doaj +1 more source
Turbulence kinetic energy equation for dilute suspensions [PDF]
A multiphase turbulence closure model is presented which employs one transport equation, namely the turbulence kinetic energy equation. The proposed form of this equation is different from the earlier formulations in some aspects.
Abou-Arab, T. W., Roco, M. C.
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Calculating Turbulence Intensity from mesoscale modeled Turbulence Kinetic Energy
, 2022 This note documents the derivation of the relationship between turbulence kinetic energy (TKE) and turbulence intensity (TI). TI is an important input for e.g. engineering wake modelling, but it is not a parameter that is provided by mesoscale modelling.
openaire +1 more source
Energy Science &Engineering, EarlyView.This study presents a new control strategy for doubly fed induction generator (DFIG) wind turbine systems to overcome the limitations of traditional direct field control using proportional‐integral (DFOC‐PI) regulators, which are sensitive to coefficient changes and lead to low power quality.
Hamza Gasmi +5 more
wiley +1 more source
Role of viscoelasticity in the appearance of low-Reynolds turbulence: considerations for modelling
Journal of Biological EngineeringInertial effects caused by perturbations of dynamical equilibrium during the flow of soft matter constitute a hallmark of turbulence. Such perturbations are attributable to an imbalance between energy storage and energy dissipation.
Ivana Pajic-Lijakovic +2 more
doaj +1 more source