Results 21 to 30 of about 56,783 (308)

Numerical investigation of two-component single-phase natural convection and thermal stratification phenomena in a rod bundle with axial heat flux profile

open access: yesNuclear Engineering and Technology, 2022
The most numerical investigations of the thermal-hydraulic phenomena following the loss of the residual heat removal capability during the mid-loop operation of the pressurized water reactor were performed according to simplifications and are not ...
Audrius Graževičius   +3 more
doaj   +1 more source

Thermal balance in convective therapies [PDF]

open access: yesNephrology Dialysis Transplantation, 2003
Among the factors causing intradialytic haemodynamic instability, dialysate temperature has been shown to play a relevant role. An improved cardiovascular response during isolated ultrafiltration or with cooled dialysate has been described in the past. Cold dialysate may increase the external heat loss compensating for the increase in core temperature,
Antonio, Santoro   +3 more
openaire   +2 more sources

Thermal vibrational convection in near-critical fluids. Part 1. Non-uniform heating [PDF]

open access: yes, 2006
A theoretical model describing the response of a single-phase near-critical fluid to small-amplitude, high-frequency translational vibrations is developed on the basis of the multiple-scale and averaging methods.
Vorobev, Anatoliy   +9 more
core   +1 more source

Numerical optimization of forced thermal convection in transverse tube bundles based on double-distribution-function lattice Boltzmann method

open access: yesCase Studies in Thermal Engineering, 2023
Forced thermal convection of transverse tube bundles is common in various thermal equipment, such as boiler economizers and air pre-heaters. In this study, the forced thermal convection in transverse tube bundles is simulated based on the double ...
Jialei Xue   +3 more
doaj   +1 more source

Convection Heat Transfer and Flow Calculations Suitable for Electric Machines Thermal Models [PDF]

open access: yes, 2008
This paper deals with the formulations used to predict convection cooling and flow in electric machines. Empirical dimensionless analysis formulations are used to calculate convection heat transfer.
D. A. STATON   +2 more
core   +1 more source

Hydrodynamics of thermal granular convection [PDF]

open access: yesPhysical Review E, 2002
A hydrodynamic theory is formulated for buoyancy-driven ("thermal") granular convection, recently predicted in molecular dynamic simulations and observed in experiment. The limit of a dilute flow is considered. The problem is fully described by three scaled parameters.
He, Xiaoyi   +2 more
openaire   +3 more sources

Time Evolution Features of Entropy Generation Rate in Turbulent Rayleigh-Bénard Convection with Mixed Insulating and Conducting Boundary Conditions

open access: yesEntropy, 2020
Time evolution features of kinetic and thermal entropy generation rates in turbulent Rayleigh-Bénard (RB) convection with mixed insulating and conducting boundary conditions at Ra = 109 are numerically investigated using the lattice Boltzmann method. The
Yikun Wei   +4 more
doaj   +1 more source

Data on the Validation to Determine the Material Thermal Properties Estimation Via a One-Dimensional Transient Convection Model

open access: yesData in Brief, 2022
These data were acquired to estimate the parameters of a closed form solution of a one-dimensional transient convection heat diffusion PDE. The purpose was to demonstrate that the model could be used to determine the thermal conductivity.
Lauren B. Tomanek, Daniel S. Stutts
doaj   +1 more source

Melting of PCM in a thermal energy storage unit: Numerical investigation and effect of nanoparticle enhancement [PDF]

open access: yes, 2012
The present paper describes the analysis of the melting process in a single vertical shell-and-tube latent heat thermal energy storage (LHTES), unit and it is directed at understanding the thermal performance of the system.
Sciacovelli, Adriano   +3 more
core   +1 more source

Thermal Convection for Large Prandtl Numbers [PDF]

open access: yesPhysical Review Letters, 2001
The Rayleigh-Benard theory by Grossmann and Lohse [J. Fluid Mech. 407, 27 (2000)] is extended towards very large Prandtl numbers Pr. The Nusselt number Nu is found here to be independent of Pr. However, for fixed Rayleigh numbers Ra> 10^{10} a maximum around Pr= 2 in the Nu(Pr)-dependence is predicted which is absent for lower Ra.
Grossmann, Siegfried, Lohse, Detlef
openaire   +3 more sources

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