Results 31 to 40 of about 28,996 (257)

Heat conduction and thermal convection on thermal front movement during natural gas hydrate thermal stimulation exploitation

open access: yesOil & Gas Science and Technology, 2018
Natural Gas Hydrate (NGH) has attracted increasing attention for its great potential as clean energy in the future. The main heat transfer mode that controls the thermal front movement in the process of NGH exploitation by heat injection was discussed ...
Hao Yongmao   +5 more
doaj   +1 more source

Inverse cascades of kinetic energy and thermal variance in three-dimensional horizontally extended turbulent convection

open access: yesPhysical Review Research, 2022
Inverse cascades of kinetic energy and thermal variance in the subset of vertically homogeneous modes in spectral space are found to cause a slow aggregation to a pair of convective supergranules that eventually fill the whole horizontally extended ...
Philipp P. Vieweg   +3 more
doaj   +1 more source

The Cheng-Minkowycz problem for quadratic convective and radiative heat transfer in a nanofluid saturated porous medium: A revised model

open access: yesCase Studies in Thermal Engineering, 2023
The characteristics of heat transport in a porous medium saturated by a nanoliquid subject to non-linear variations of density-temperature relation and a novel quadratic thermal radiation are studied.
Puneet Rana, Akash Kumar, Sarita Pippal
doaj   +1 more source

Air Convection in the Active Layer of Rock Glaciers

open access: yesFrontiers in Earth Science, 2020
Coarse blocks are an abundant surface cover in mountainous permafrost landscapes. In this coarse blocky layer, air convection occurs and has a significant influence on the ground thermal regime of the underlying permafrost.
Jonas Wicky, Christian Hauck
doaj   +1 more source

Onset of convection in a hybrid nanofluid porous layer

open access: yesZaštita Materijala
Thermal instability in nanofluid–porous systems is of significant interest due to its direct relevance in advanced thermal management, energy storage, and heat transfer enhancement technologies.
Sushma Patil   +3 more
doaj   +1 more source

Compressible Analysis of Bénard Convection of Magneto Rotatory Couple-Stress Fluid

open access: yesInternational Journal of Applied Mechanics and Engineering, 2018
Thermal Instability (Benard’s Convection) in the presence of uniform rotation and uniform magnetic field (separately) is studied. Using the linearized stability theory and normal mode analyses the dispersion relation is obtained in each case. In the case
C.B. Mehta, M. Singh
doaj   +1 more source

MHD mixed convection flow of third grade liquid subject to non-linear thermal radiation and convective condition

open access: yesResults in Physics, 2017
Magnetohydrodynamic (MHD) mixed convection flow of third grade fluid by an exponentially stretching sheet is addressed. Energy expression involves the convective condition and non-linear thermal radiation.
T. Hayat   +3 more
doaj   +1 more source

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

open access: yesAdvanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm   +3 more
wiley   +1 more source

Evaluation of the melting process of phase change materials in a tilted rectangular container: Experimental study

open access: yesEnergy and Built Environment
Natural convection plays a crucial role in improving the heat transfer efficiency during the phase change material (PCM) melting process. A major challenge is understanding the intensity and transformation of natural convection, which was strongly ...
Qi Peng   +5 more
doaj   +1 more source

Performance study of a solar chimney air heater

open access: yesCase Studies in Thermal Engineering, 2019
The thermal efficiency of conventional solar air heaters could be significantly improved by making some design configurations. In this study, a solar chimney air heater was employed and the effect of glazing, fins and convection (natural/forced) on the ...
Prakash Parthasarathy   +1 more
doaj   +1 more source

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